From 4ae318335c7e941cc7b5019fe691c941cceb03d2 Mon Sep 17 00:00:00 2001
From: "Logan.Li" <admin@attacker.club>
Date: Fri, 7 Aug 2026 15:02:00 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20=E5=AE=8C=E6=88=90=20opsx-licence=20?=
 =?UTF-8?q?=E8=AE=B8=E5=8F=AF=E8=AF=81=E7=AE=A1=E7=90=86=E5=B9=B3=E5=8F=B0?=
 =?UTF-8?q?=E5=85=A8=E6=A0=88=E5=AE=9E=E7=8E=B0?=
MIME-Version: 1.0
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Content-Transfer-Encoding: 8bit

基于 opsx-web-lite 框架（Go+Gin+Vue3+Element Plus）构建许可证管理服务器，
业务域参考 Licence 服务器 Web 版。

【后端 - 4层架构】
- 认证：单 Admin 表 + JWT（HS256）
- 核心授权域：Product / Customer / License / Activation
  · License 生成/验证/激活/机器绑定/心跳/续期/吊销
  · 客户端契约接口：/api/v1/license/{verify,activate,deactivate,heartbeat}
- 定价订单：Plan / Order / 支付网关配置
- 防重复购买：CustomerEntitlement + 幂等支付 webhook + 手动发放
- 分析审计：Dashboard 统计 / Analytics / AuditLog / Setting 管理

【前端】
- Dashboard（ECharts 图表）、产品、客户、License、计划、订单、权益、日志、设置
- 9 个完整 CRUD 业务页面 + 登录/布局

【部署】
- SQLite + 单二进制（//go:embed 嵌入前端）
- 开发：./run.sh start（前端5181/后端9001）
- 生产：./run.sh build && ./run.sh binary start
- 默认账号：admin/admin

Author: Logan.Li
---
 .env.example                                  |   47 +
 .gitignore                                    |   78 +
 AGENTS.md                                     |   85 +
 Makefile                                      |   88 +
 README.md                                     |  104 +
 backend/config/config.go                      |   94 +
 backend/database/database.go                  |   66 +
 backend/database/seed.go                      |  154 ++
 backend/embed.go                              |   60 +
 backend/go.mod                                |   50 +
 backend/go.sum                                |  109 +
 .../analytics/analytics_controller.go         |   92 +
 .../controller/auth/auth_controller.go        |   76 +
 .../customer/customer_controller.go           |  135 +
 .../entitlement/entitlement_controller.go     |   96 +
 .../controller/license/client_controller.go   |   79 +
 .../controller/license/license_controller.go  |  211 ++
 .../controller/order/order_controller.go      |  164 ++
 .../controller/plan/plan_controller.go        |  129 +
 .../controller/product/product_controller.go  |  137 +
 .../controller/setting/setting_controller.go  |  115 +
 backend/internal/dto/analytics.go             |   76 +
 backend/internal/dto/auth.go                  |   28 +
 backend/internal/dto/commerce.go              |  166 ++
 backend/internal/dto/common.go                |   19 +
 backend/internal/dto/license.go               |  103 +
 backend/internal/dto/product.go               |   75 +
 backend/internal/model/audit.go               |   42 +
 backend/internal/model/customer.go            |   28 +
 backend/internal/model/entitlement.go         |   28 +
 backend/internal/model/license.go             |   83 +
 backend/internal/model/order.go               |   54 +
 backend/internal/model/plan.go                |   26 +
 backend/internal/model/product.go             |   30 +
 backend/internal/model/setting.go             |   27 +
 backend/internal/model/user.go                |   27 +
 .../service/analytics/analytics_service.go    |  167 ++
 backend/internal/service/auth/auth_service.go |   91 +
 .../service/customer/customer_service.go      |  146 ++
 .../entitlement/entitlement_service.go        |  195 ++
 .../service/license/client_service.go         |  158 ++
 .../service/license/license_service.go        |  343 +++
 .../internal/service/order/order_service.go   |  459 ++++
 backend/internal/service/plan/plan_service.go |  161 ++
 .../service/product/product_service.go        |  171 ++
 .../service/setting/setting_service.go        |  140 +
 backend/main.go                               |   63 +
 backend/middleware/auth.go                    |   56 +
 backend/middleware/cors.go                    |   31 +
 backend/router/router.go                      |  225 ++
 backend/static/.gitkeep                       |    3 +
 backend/utils/audit.go                        |   62 +
 backend/utils/jwt.go                          |   54 +
 backend/utils/license.go                      |   89 +
 backend/utils/password.go                     |   14 +
 frontend/.env.development                     |    2 +
 frontend/.env.production                      |    2 +
 frontend/index.html                           |   13 +
 frontend/package-lock.json                    | 2310 +++++++++++++++++
 frontend/package.json                         |   27 +
 frontend/src/App.vue                          |   19 +
 frontend/src/api/analytics.js                 |   31 +
 frontend/src/api/auth.js                      |   27 +
 frontend/src/api/customer.js                  |   31 +
 frontend/src/api/entitlement.js               |   19 +
 frontend/src/api/license.js                   |   51 +
 frontend/src/api/order.js                     |   15 +
 frontend/src/api/plan.js                      |   23 +
 frontend/src/api/product.js                   |   31 +
 frontend/src/api/request.js                   |   95 +
 frontend/src/api/setting.js                   |   31 +
 frontend/src/layouts/MainLayout.vue           |  207 ++
 frontend/src/main.js                          |   26 +
 frontend/src/router/index.js                  |  109 +
 frontend/src/stores/user.js                   |   51 +
 frontend/src/views/Customers.vue              |  119 +
 frontend/src/views/Dashboard.vue              |  146 ++
 frontend/src/views/Entitlements.vue           |  118 +
 frontend/src/views/Licenses.vue               |  251 ++
 frontend/src/views/Login.vue                  |  126 +
 frontend/src/views/Logs.vue                   |   79 +
 frontend/src/views/NotFound.vue               |   22 +
 frontend/src/views/Orders.vue                 |  130 +
 frontend/src/views/Plans.vue                  |  152 ++
 frontend/src/views/Products.vue               |  134 +
 frontend/src/views/Settings.vue               |  124 +
 frontend/vite.config.js                       |   26 +
 run.sh                                        |  406 +++
 88 files changed, 10562 insertions(+)
 create mode 100644 .env.example
 create mode 100644 .gitignore
 create mode 100644 AGENTS.md
 create mode 100644 Makefile
 create mode 100644 README.md
 create mode 100644 backend/config/config.go
 create mode 100644 backend/database/database.go
 create mode 100644 backend/database/seed.go
 create mode 100644 backend/embed.go
 create mode 100644 backend/go.mod
 create mode 100644 backend/go.sum
 create mode 100644 backend/internal/controller/analytics/analytics_controller.go
 create mode 100644 backend/internal/controller/auth/auth_controller.go
 create mode 100644 backend/internal/controller/customer/customer_controller.go
 create mode 100644 backend/internal/controller/entitlement/entitlement_controller.go
 create mode 100644 backend/internal/controller/license/client_controller.go
 create mode 100644 backend/internal/controller/license/license_controller.go
 create mode 100644 backend/internal/controller/order/order_controller.go
 create mode 100644 backend/internal/controller/plan/plan_controller.go
 create mode 100644 backend/internal/controller/product/product_controller.go
 create mode 100644 backend/internal/controller/setting/setting_controller.go
 create mode 100644 backend/internal/dto/analytics.go
 create mode 100644 backend/internal/dto/auth.go
 create mode 100644 backend/internal/dto/commerce.go
 create mode 100644 backend/internal/dto/common.go
 create mode 100644 backend/internal/dto/license.go
 create mode 100644 backend/internal/dto/product.go
 create mode 100644 backend/internal/model/audit.go
 create mode 100644 backend/internal/model/customer.go
 create mode 100644 backend/internal/model/entitlement.go
 create mode 100644 backend/internal/model/license.go
 create mode 100644 backend/internal/model/order.go
 create mode 100644 backend/internal/model/plan.go
 create mode 100644 backend/internal/model/product.go
 create mode 100644 backend/internal/model/setting.go
 create mode 100644 backend/internal/model/user.go
 create mode 100644 backend/internal/service/analytics/analytics_service.go
 create mode 100644 backend/internal/service/auth/auth_service.go
 create mode 100644 backend/internal/service/customer/customer_service.go
 create mode 100644 backend/internal/service/entitlement/entitlement_service.go
 create mode 100644 backend/internal/service/license/client_service.go
 create mode 100644 backend/internal/service/license/license_service.go
 create mode 100644 backend/internal/service/order/order_service.go
 create mode 100644 backend/internal/service/plan/plan_service.go
 create mode 100644 backend/internal/service/product/product_service.go
 create mode 100644 backend/internal/service/setting/setting_service.go
 create mode 100644 backend/main.go
 create mode 100644 backend/middleware/auth.go
 create mode 100644 backend/middleware/cors.go
 create mode 100644 backend/router/router.go
 create mode 100644 backend/static/.gitkeep
 create mode 100644 backend/utils/audit.go
 create mode 100644 backend/utils/jwt.go
 create mode 100644 backend/utils/license.go
 create mode 100644 backend/utils/password.go
 create mode 100644 frontend/.env.development
 create mode 100644 frontend/.env.production
 create mode 100644 frontend/index.html
 create mode 100644 frontend/package-lock.json
 create mode 100644 frontend/package.json
 create mode 100644 frontend/src/App.vue
 create mode 100644 frontend/src/api/analytics.js
 create mode 100644 frontend/src/api/auth.js
 create mode 100644 frontend/src/api/customer.js
 create mode 100644 frontend/src/api/entitlement.js
 create mode 100644 frontend/src/api/license.js
 create mode 100644 frontend/src/api/order.js
 create mode 100644 frontend/src/api/plan.js
 create mode 100644 frontend/src/api/product.js
 create mode 100644 frontend/src/api/request.js
 create mode 100644 frontend/src/api/setting.js
 create mode 100644 frontend/src/layouts/MainLayout.vue
 create mode 100644 frontend/src/main.js
 create mode 100644 frontend/src/router/index.js
 create mode 100644 frontend/src/stores/user.js
 create mode 100644 frontend/src/views/Customers.vue
 create mode 100644 frontend/src/views/Dashboard.vue
 create mode 100644 frontend/src/views/Entitlements.vue
 create mode 100644 frontend/src/views/Licenses.vue
 create mode 100644 frontend/src/views/Login.vue
 create mode 100644 frontend/src/views/Logs.vue
 create mode 100644 frontend/src/views/NotFound.vue
 create mode 100644 frontend/src/views/Orders.vue
 create mode 100644 frontend/src/views/Plans.vue
 create mode 100644 frontend/src/views/Products.vue
 create mode 100644 frontend/src/views/Settings.vue
 create mode 100644 frontend/vite.config.js
 create mode 100755 run.sh

diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..aad1ec4
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,47 @@
+# opsx-licence - 环境变量配置模板
+# 复制此文件为 .env 并根据需要修改
+
+# ============================================
+# 后端配置 (backend)
+# ============================================
+
+# 服务器端口
+PORT=9001
+
+# 运行模式: debug / release
+GIN_MODE=debug
+
+# JWT 密钥（生产环境必须修改！）
+JWT_SECRET=your-super-secret-key-change-this-in-production
+
+# 数据库配置
+# 可选: sqlite / mysql / postgres
+DB_DRIVER=sqlite
+DB_NAME=db.sqlite3
+
+# MySQL 配置（使用 mysql 时填写）
+# DB_HOST=127.0.0.1
+# DB_PORT=3306
+# DB_USER=root
+# DB_PASSWORD=your-password
+# DB_NAME=opsx_licence
+
+# PostgreSQL 配置（使用 postgres 时填写）
+# DB_HOST=127.0.0.1
+# DB_PORT=5432
+# DB_USER=postgres
+# DB_PASSWORD=your-password
+# DB_NAME=opsx_licence
+
+# CORS 配置（多个用逗号分隔）
+# CORS_ORIGINS=http://localhost:5181,http://127.0.0.1:5181
+
+# ============================================
+# 前端配置 (frontend)
+# ============================================
+
+# 开发环境 API 地址
+VITE_API_BASE_URL=http://localhost:9001/api
+
+# 生产环境 API 地址（构建时注入）
+# VITE_APP_BASE_API=/api
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7917125
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,78 @@
+# ============================================
+# 全局忽略配置
+# ============================================
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Environment
+.env
+.env.local
+.env.*.local
+
+# ZCode / Claude 工作目录
+.zcode/
+.claude/
+
+# ============================================
+# 后端 (backend)
+# ============================================
+
+# Binaries
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+backend/backend
+backend/server
+backend/main
+
+# Test binary
+*.test
+
+# Output of the go coverage tool
+*.out
+
+# Dependency directories
+vendor/
+
+# Go workspace file
+go.work
+
+# Database
+*.db
+*.sqlite
+*.sqlite3
+
+# 日志文件
+logs/
+*.log
+
+# PID 文件
+*.pid
+*_monitor.pid
+
+# ============================================
+# 前端 (frontend)
+# ============================================
+
+node_modules/
+
+# 构建输出
+dist/
+
+# 单二进制构建时暂存的前端资源
+backend/static/*
+!backend/static/.gitkeep
+
+# 单二进制构建产物
+opsx-licence
diff --git a/AGENTS.md b/AGENTS.md
new file mode 100644
index 0000000..3a92f2a
--- /dev/null
+++ b/AGENTS.md
@@ -0,0 +1,85 @@
+# AGENTS.md — opsx-licence 开发约定
+
+本文件供 AI 协作助手（Claude / ZCode 等）参考，确保产出代码与项目既有风格一致。
+
+## 语言与签名
+
+- **所有交互、注释、文档一律使用中文。**
+- 每次新增或修改代码注释时，在注释末尾追加 `// Logan.Li` 签名。
+- 函数必须有文档注释（以函数名开头）。
+
+## 后端约定
+
+### 分层架构（4 层）
+
+```
+internal/controller/<domain>/   HTTP 处理层（gin.Context）
+        ↓
+internal/service/<domain>/      业务逻辑层（持有 *gorm.DB + *config.Config）
+        ↓
+internal/dto/                   请求/响应结构体（扁平包，按域分文件）
+internal/model/                 GORM 模型（扁平包，按域分文件）
+        ↓
+      GORM
+```
+
+### 硬性约束
+
+- **Controller 方法 ≤ 80 行**：只做参数校验 + 响应格式化；复杂逻辑下沉到 Service。
+- **Service 承载所有业务逻辑**：DB 操作、业务规则、跨表事务。
+- **单文件 ≤ 300 行**：超出则按子域拆分。
+- **标准 CRUD 方法名**：`List / Get / Create / Update / Delete`。
+- Controller 持有 `service` 与 `db`；Service 持有 `db` 与 `cfg`。
+
+### 响应格式
+
+统一使用 `dto.Response{Code, Message, Data}`，`code:0` 表示成功。
+
+分页响应结构：
+```json
+{
+  "code": 0,
+  "data": {
+    "count": 100,
+    "total_pages": 10,
+    "current_page": 1,
+    "page_size": 10,
+    "next": "...",
+    "previous": "...",
+    "results": []
+  }
+}
+```
+
+### 新增业务域步骤（示例：product）
+
+1. `internal/model/product.go` —— GORM 模型
+2. `internal/dto/product.go` —— 请求/响应 DTO
+3. `internal/service/product/product_service.go` —— 业务逻辑
+4. `internal/controller/product/product_controller.go` —— HTTP handler
+5. 在 `router/router.go` 的 protected 组注册路由
+
+### 路由规范
+
+- 统一 `/api` 前缀，集中注册于 `router/router.go`。
+- 公开接口（登录、客户端验证等）放公开组；管理接口放 JWT 保护组。
+
+## 前端约定
+
+- **Vue 3 Composition API + `<script setup>`**。
+- **Element Plus**：`el-checkbox` / `el-radio` 的选项用 `value` 而非 `label`。
+- **减少打扰**：常规操作不发成功 toast；仅错误用 `ElMessage.error`；危险操作用确认弹窗。
+- **命名**：组件 PascalCase（`UserList.vue`），工具 camelCase（`request.js`），目录 kebab-case。
+- 接口封装在 `src/api/`，每个业务域一个文件，统一基于 `@/utils/request` 或 `@/api/request` 的 axios 实例。
+
+## 认证体系
+
+- 单 Admin 表（无 RBAC 多角色）。
+- JWT 单 token，HS256，24h 过期。
+- 中间件 `AuthMiddleware` 校验 `Authorization: Bearer <token>`，写入 `user_id` 到上下文。
+
+## 安全
+
+- 生产环境（`release` 模式）必须设置 `JWT_SECRET`，否则启动失败。
+- CORS 使用显式白名单，禁止 `*`。
+- 默认账号 `admin/admin` 必须在部署后修改。
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..dbfeb43
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,88 @@
+# opsx-licence - Makefile
+# 提供常用开发命令的快捷方式
+
+.PHONY: help install dev build build-ui build-api build-binary clean status stop restart lint test
+
+# 默认显示帮助
+help:
+	@echo "opsx-licence - 可用命令:"
+	@echo ""
+	@echo "  make install       - 安装前后端依赖"
+	@echo "  make dev           - 启动开发环境（前后端）"
+	@echo "  make build         - 构建前后端（分开）"
+	@echo "  make build-ui      - 仅构建前端"
+	@echo "  make build-api     - 仅构建后端"
+	@echo "  make build-binary  - 构建前端嵌入式单二进制 opsx-licence"
+	@echo "  make test          - 运行后端测试"
+	@echo "  make lint          - 运行代码检查"
+	@echo "  make clean         - 清理构建产物和日志"
+	@echo "  make status        - 查看服务状态"
+	@echo "  make stop          - 停止所有服务"
+	@echo "  make restart       - 重启所有服务"
+	@echo "  make logs          - 查看实时日志"
+	@echo ""
+
+# 安装依赖
+install:
+	@echo "📦 安装后端依赖..."
+	cd backend && go mod download
+	@echo "📦 安装前端依赖..."
+	cd frontend && npm install
+
+# 开发环境启动
+dev:
+	./run.sh start
+
+# 构建前端
+build-ui:
+	@echo "🔨 构建前端..."
+	cd frontend && npm run build
+
+# 构建后端
+build-api:
+	@echo "🔨 构建后端..."
+	cd backend && go build -o server -ldflags="-s -w" .
+
+# 构建所有（分开）
+build: build-ui build-api
+
+# 构建前后端合一的部署二进制 // Logan.Li
+build-binary:
+	./run.sh build
+
+# 后端测试
+test:
+	@echo "🧪 运行后端测试..."
+	cd backend && go test -v -race -coverprofile=coverage.out ./...
+	@echo "📊 后端覆盖率:"
+	@cd backend && go tool cover -func=coverage.out | grep total
+
+# 代码检查
+lint:
+	@echo "🔍 检查后端代码..."
+	cd backend && go vet ./...
+
+# 清理
+clean:
+	@echo "🧹 清理构建产物..."
+	rm -f backend/server backend/backend
+	rm -rf frontend/dist
+	rm -f backend/logs/*.log frontend/logs/*.log logs/*.log
+	rm -f opsx-licence
+	@echo "🧹 清理完成"
+
+# 查看状态
+status:
+	./run.sh status
+
+# 停止服务
+stop:
+	./run.sh stop
+
+# 重启服务
+restart:
+	./run.sh restart
+
+# 查看日志
+logs:
+	@tail -f backend/logs/server.log frontend/logs/dev.log 2>/dev/null || echo "日志文件不存在"
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..44813b4
--- /dev/null
+++ b/README.md
@@ -0,0 +1,104 @@
+# opsx-licence
+
+许可证（License）管理服务器 Web 版 —— 基于 Go (Gin) + Vue 3 的单体全栈应用。
+
+## 项目简介
+
+opsx-licence 是一个统一的授权验证与管理服务，提供许可证的生成、验证、激活、机器绑定、心跳等核心能力，并支持产品定价、订单购买、防重复购买与支付回调。
+
+技术栈与工程结构参考 [opsx-web-lite](../opsx-web-lite)，业务领域参考 Licence 服务器 Web版。
+
+## 技术栈
+
+### 后端
+- **语言/框架**：Go 1.24 + Gin
+- **ORM**：GORM（默认 SQLite，支持 MySQL / PostgreSQL）
+- **认证**：JWT（HS256）+ bcrypt
+- **架构**：4 层分层（controller → service → dto → model），按业务域分包
+
+### 前端
+- **框架**：Vue 3.4 + Vite
+- **UI**：Element Plus
+- **状态/路由**：Pinia + Vue Router 4
+- **图表**：ECharts
+
+### 部署
+- 单二进制：前端通过 `//go:embed` 打包进 Go 二进制，一个文件即可部署
+
+## 快速开始
+
+### 环境要求
+- Go >= 1.24
+- Node.js >= 20
+- CGO（SQLite 驱动需要，macOS 自带 gcc）
+
+### 一键启动（开发模式）
+
+```bash
+cp .env.example .env
+./run.sh start
+```
+
+- 前端：http://localhost:5181
+- 后端：http://localhost:9001
+- 默认账号：`admin` / `admin`
+
+### 构建单二进制
+
+```bash
+./run.sh build
+./run.sh binary start
+```
+
+## 常用命令
+
+| 命令 | 说明 |
+|---|---|
+| `make dev` / `./run.sh start` | 启动前后端开发服务 |
+| `make build` / `./run.sh build` | 构建嵌入前端的单二进制 |
+| `./run.sh stop` | 停止服务 |
+| `./run.sh status` | 查看服务状态 |
+| `make clean` | 清理构建产物 |
+
+## 项目结构
+
+```
+opsx-licence/
+├── backend/                 # Go 后端
+│   ├── main.go              # 入口
+│   ├── embed.go             # 前端嵌入
+│   ├── config/              # 配置
+│   ├── database/            # 数据库初始化 + 种子数据
+│   ├── middleware/          # 中间件（auth / cors）
+│   ├── router/              # 路由
+│   ├── utils/               # 工具（jwt / password）
+│   └── internal/            # 业务分层
+│       ├── controller/      # HTTP 处理层
+│       ├── service/         # 业务逻辑层
+│       ├── dto/             # 请求/响应结构
+│       └── model/           # 数据模型
+├── frontend/                # Vue 前端
+│   └── src/
+│       ├── api/             # 接口封装
+│       ├── stores/          # Pinia 状态
+│       ├── router/          # 路由
+│       ├── layouts/         # 布局
+│       └── views/           # 页面
+├── Makefile
+├── run.sh                   # 启动脚本
+└── .env.example
+```
+
+## 业务域（规划）
+
+| 模块 | 说明 | 状态 |
+|---|---|---|
+| 认证 (Auth) | 管理员登录、JWT | ✅ |
+| 核心授权 | 产品 / 客户 / License / 激活 | 🚧 规划中 |
+| 定价订单 | Plan / Order / 支付网关 | 🚧 规划中 |
+| 防重复购买 | 客户权益 / 幂等回调 | 🚧 规划中 |
+| 分析审计 | Dashboard / Analytics / AuditLog | 🚧 规划中 |
+
+## 作者
+
+Logan.Li
diff --git a/backend/config/config.go b/backend/config/config.go
new file mode 100644
index 0000000..adfd4c2
--- /dev/null
+++ b/backend/config/config.go
@@ -0,0 +1,94 @@
+package config
+
+import (
+	"crypto/rand"
+	"encoding/base64"
+	"log"
+	"os"
+	"strings"
+
+	"github.com/joho/godotenv"
+)
+
+// Config 应用配置 // Logan.Li
+type Config struct {
+	// 服务器配置
+	Port string
+	Mode string // debug, release
+
+	// 数据库配置
+	DBDriver   string
+	DBHost     string
+	DBPort     string
+	DBUser     string
+	DBPassword string
+	DBName     string
+
+	// JWT 配置
+	JWTSecret string
+
+	// CORS 配置
+	CORSOrigins []string
+}
+
+// Load 从环境变量加载配置 // Logan.Li
+func Load() *Config {
+	// 加载 .env 文件（如果存在） // Logan.Li
+	_ = godotenv.Load()
+
+	cfg := &Config{
+		Port:       getEnv("PORT", "9001"),
+		Mode:       getEnv("GIN_MODE", "debug"),
+		DBDriver:   getEnv("DB_DRIVER", "sqlite"),
+		DBHost:     getEnv("DB_HOST", "127.0.0.1"),
+		DBPort:     getEnv("DB_PORT", "3306"),
+		DBUser:     getEnv("DB_USER", "root"),
+		DBPassword: getEnv("DB_PASSWORD", ""),
+		DBName:     getEnv("DB_NAME", "db.sqlite3"),
+		JWTSecret:  getEnv("JWT_SECRET", ""),
+		CORSOrigins: []string{
+			"http://localhost:5181",
+			"http://127.0.0.1:5181",
+			"http://localhost:3000",
+			"http://127.0.0.1:3000",
+		},
+	}
+
+	// 安全检查：生产环境拒绝空密钥，开发环境使用进程级随机密钥避免固定后门。 // Logan.Li
+	if cfg.JWTSecret == "" {
+		if cfg.Mode == "release" {
+			log.Fatal("[安全] 生产环境必须设置 JWT_SECRET 环境变量")
+		}
+		cfg.JWTSecret = generateEphemeralJWTSecret()
+		log.Println("[安全] JWT_SECRET 未设置，已生成仅当前开发进程有效的随机密钥")
+	}
+
+	return cfg
+}
+
+// IsOriginAllowed 判断浏览器 Origin 是否在显式 CORS 白名单中。 // Logan.Li
+func (c *Config) IsOriginAllowed(origin string) bool {
+	for _, allowed := range c.CORSOrigins {
+		if strings.EqualFold(strings.TrimSpace(origin), strings.TrimSpace(allowed)) {
+			return true
+		}
+	}
+	return false
+}
+
+// generateEphemeralJWTSecret 生成开发环境临时 JWT 密钥。 // Logan.Li
+func generateEphemeralJWTSecret() string {
+	bytes := make([]byte, 32)
+	if _, err := rand.Read(bytes); err != nil {
+		log.Fatal("[安全] 生成开发 JWT 密钥失败")
+	}
+	return base64.RawURLEncoding.EncodeToString(bytes)
+}
+
+// getEnv 读取环境变量，不存在则返回默认值 // Logan.Li
+func getEnv(key, defaultValue string) string {
+	if value := os.Getenv(key); value != "" {
+		return value
+	}
+	return defaultValue
+}
diff --git a/backend/database/database.go b/backend/database/database.go
new file mode 100644
index 0000000..786464b
--- /dev/null
+++ b/backend/database/database.go
@@ -0,0 +1,66 @@
+package database
+
+import (
+	"backend/config"
+	"backend/internal/model"
+	"fmt"
+
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
+)
+
+// Init 初始化数据库连接并执行迁移 // Logan.Li
+func Init(cfg *config.Config) (*gorm.DB, error) {
+	logLevel := getLogLevel(cfg.Mode)
+
+	fmt.Printf("[数据库] 使用 SQLite: %s\n", cfg.DBName)
+	db, err := gorm.Open(sqlite.Open(cfg.DBName), &gorm.Config{
+		Logger: logger.Default.LogMode(logLevel),
+	})
+	if err != nil {
+		return nil, fmt.Errorf("SQLite 连接失败: %v", err)
+	}
+
+	return migrateDatabase(db)
+}
+
+// getLogLevel 根据运行模式返回日志级别 // Logan.Li
+func getLogLevel(mode string) logger.LogLevel {
+	if mode == "release" {
+		return logger.Warn
+	}
+	return logger.Info
+}
+
+// migrateDatabase 执行数据库迁移 // Logan.Li
+func migrateDatabase(db *gorm.DB) (*gorm.DB, error) {
+	err := db.AutoMigrate(
+		// 认证与系统
+		&model.User{},                  // 管理员用户 // Logan.Li
+		&model.Setting{},               // 系统设置 // Logan.Li
+		&model.AuditLog{},              // 操作日志 // Logan.Li
+		&model.LicenseTemplate{},       // License 模板 // Logan.Li
+		&model.PaymentGatewayConfig{},  // 支付网关配置 // Logan.Li
+		// 核心授权域
+		&model.Product{},               // 产品 // Logan.Li
+		&model.Customer{},              // 客户 // Logan.Li
+		&model.License{},               // License // Logan.Li
+		&model.Activation{},            // 激活记录 // Logan.Li
+		// 定价与订单
+		&model.Plan{},                  // 定价计划 // Logan.Li
+		&model.Order{},                 // 订单 // Logan.Li
+		// 防重复购买
+		&model.CustomerEntitlement{},   // 客户权益 // Logan.Li
+	)
+	if err != nil {
+		return nil, fmt.Errorf("数据库迁移失败: %v", err)
+	}
+
+	// 初始化种子数据（默认管理员、默认设置、示例数据） // Logan.Li
+	if err := SeedDefaults(db); err != nil {
+		return nil, fmt.Errorf("种子数据初始化失败: %v", err)
+	}
+
+	return db, nil
+}
diff --git a/backend/database/seed.go b/backend/database/seed.go
new file mode 100644
index 0000000..a875af7
--- /dev/null
+++ b/backend/database/seed.go
@@ -0,0 +1,154 @@
+package database
+
+import (
+	"backend/internal/model"
+	"backend/utils"
+	"log"
+	"time"
+
+	"gorm.io/gorm"
+)
+
+const (
+	defaultAdminUsername = "admin"
+	defaultAdminPassword = "admin"
+)
+
+// SeedDefaults 初始化默认数据：管理员账号 + 系统设置 + 示例业务数据 // Logan.Li
+func SeedDefaults(db *gorm.DB) error {
+	if err := seedAdmin(db); err != nil {
+		return err
+	}
+	if err := seedSetting(db); err != nil {
+		return err
+	}
+	if err := seedSampleData(db); err != nil {
+		return err
+	}
+	return nil
+}
+
+// seedAdmin 初始化默认管理员账号（仅在不存在时创建） // Logan.Li
+func seedAdmin(db *gorm.DB) error {
+	var count int64
+	db.Model(&model.User{}).Where("username = ?", defaultAdminUsername).Count(&count)
+	if count > 0 {
+		return nil
+	}
+
+	admin := model.User{
+		Username: defaultAdminUsername,
+		Password: utils.HashPassword(defaultAdminPassword),
+		Email:    "admin@opsx-licence.local",
+		Role:     "admin",
+		IsActive: true,
+	}
+	if err := db.Create(&admin).Error; err != nil {
+		return err
+	}
+	log.Printf("[初始化] 已创建默认管理员账号: %s / %s（请尽快修改密码）", defaultAdminUsername, defaultAdminPassword)
+	return nil
+}
+
+// seedSetting 初始化默认系统设置（仅创建一次） // Logan.Li
+func seedSetting(db *gorm.DB) error {
+	var count int64
+	db.Model(&model.Setting{}).Count(&count)
+	if count > 0 {
+		return nil
+	}
+
+	setting := model.Setting{
+		SystemName:            "opsx-licence",
+		DefaultDuration:       365,
+		DefaultMaxActivations: 1,
+		ExpireReminderDays:    7,
+		APIRateLimit:          1000,
+		LogRetentionDays:      365,
+	}
+	if err := db.Create(&setting).Error; err != nil {
+		return err
+	}
+	log.Println("[初始化] 已创建默认系统设置")
+	return nil
+}
+
+// seedSampleData 初始化示例业务数据（产品/客户/计划/支付网关），便于开发联调 // Logan.Li
+func seedSampleData(db *gorm.DB) error {
+	var productCount int64
+	db.Model(&model.Product{}).Count(&productCount)
+	if productCount > 0 {
+		return nil
+	}
+
+	// 示例产品 // Logan.Li
+	product := model.Product{
+		Name:        "OpsX Tools Suite",
+		Code:        "opsx-tools",
+		Version:     "1.0.0",
+		Description: "OpsX 工具集 - 一站式运维工具箱",
+		Features:    `["CLI","GUI","Web Console","API"]`,
+		Price:       99.00,
+		PriceModel:  "subscription",
+		Status:      1,
+	}
+	if err := db.Create(&product).Error; err != nil {
+		return err
+	}
+
+	// 示例客户 // Logan.Li
+	customer := model.Customer{
+		Name:    "示例客户",
+		Company: "Acme Inc.",
+		Email:   "demo@acme.com",
+		Phone:   "13800000000",
+		Status:  1,
+	}
+	if err := db.Create(&customer).Error; err != nil {
+		return err
+	}
+
+	// 示例定价计划（买断 + 月订阅 + 年订阅） // Logan.Li
+	plans := []model.Plan{
+		{ProductID: product.ID, Name: "个人永久版", PlanType: "perpetual", Price: 199, Currency: "USD", Duration: 0, MaxDevices: 1, Features: `["全部功能","永久使用","1 设备"]`, SortOrder: 1, Status: 1},
+		{ProductID: product.ID, Name: "专业版（月）", PlanType: "monthly", Price: 19, Currency: "USD", Duration: 30, MaxDevices: 3, Features: `["全部功能","按月订阅","3 设备"]`, SortOrder: 2, Status: 1},
+		{ProductID: product.ID, Name: "企业版（年）", PlanType: "yearly", Price: 199, Currency: "USD", Duration: 365, MaxDevices: 10, Features: `["全部功能","按年订阅优惠","10 设备","优先支持"]`, SortOrder: 3, Status: 1},
+	}
+	for i := range plans {
+		if err := db.Create(&plans[i]).Error; err != nil {
+			return err
+		}
+	}
+
+	// 示例 License // Logan.Li
+	now := time.Now()
+	license := model.License{
+		LicenseKey:     utils.GenerateLicenseKey(),
+		CustomerID:     customer.ID,
+		ProductID:      product.ID,
+		Status:         model.LicenseStatusActive,
+		StartDate:      now,
+		EndDate:        now.AddDate(0, 0, 365),
+		Duration:       365,
+		MaxActivations: 3,
+		Notes:          "示例授权，初始化生成",
+	}
+	if err := db.Create(&license).Error; err != nil {
+		return err
+	}
+
+	// 示例支付网关配置（沙箱） // Logan.Li
+	gateway := model.PaymentGatewayConfig{
+		Gateway:     "creem",
+		Enabled:     true,
+		SandboxMode: true,
+		Currency:    "USD",
+		Priority:    1,
+	}
+	if err := db.Create(&gateway).Error; err != nil {
+		return err
+	}
+
+	log.Println("[初始化] 已创建示例产品、客户、计划、License、支付网关")
+	return nil
+}
diff --git a/backend/embed.go b/backend/embed.go
new file mode 100644
index 0000000..3f94a6f
--- /dev/null
+++ b/backend/embed.go
@@ -0,0 +1,60 @@
+package main
+
+import (
+	"embed"
+	"io/fs"
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+// frontendFS 是构建时嵌入的前端生产资源。 // Logan.Li
+//
+//go:embed all:static
+var frontendFS embed.FS
+
+// setupEmbeddedFrontend 为单二进制模式提供前端静态资源和 SPA 回退。 // Logan.Li
+func setupEmbeddedFrontend(r *gin.Engine) {
+	staticFS, err := fs.Sub(frontendFS, "static")
+	if err != nil {
+		return
+	}
+	if _, err := fs.Stat(staticFS, "index.html"); err != nil {
+		// 开发模式不复制 dist，后端仅提供 API。 // Logan.Li
+		return
+	}
+
+	httpFS := http.FS(staticFS)
+	r.NoRoute(func(c *gin.Context) {
+		path := c.Request.URL.Path
+		if strings.HasPrefix(path, "/api/") || strings.HasPrefix(path, "/ws/") {
+			c.JSON(http.StatusNotFound, gin.H{"code": 404, "message": "接口不存在"})
+			return
+		}
+
+		filePath := strings.TrimPrefix(path, "/")
+		if filePath == "" {
+			filePath = "index.html"
+		}
+		if _, err := staticFS.Open(filePath); err == nil {
+			if strings.HasSuffix(filePath, ".html") {
+				c.Header("Cache-Control", "no-store, no-cache, must-revalidate")
+			}
+			c.FileFromFS(path, httpFS)
+			return
+		}
+
+		if strings.HasPrefix(filePath, "assets/") {
+			c.String(http.StatusNotFound, "static asset not found")
+			return
+		}
+		index, err := fs.ReadFile(staticFS, "index.html")
+		if err != nil {
+			c.String(http.StatusInternalServerError, "前端资源不可用")
+			return
+		}
+		c.Header("Cache-Control", "no-store, no-cache, must-revalidate")
+		c.Data(http.StatusOK, "text/html; charset=utf-8", index)
+	})
+}
diff --git a/backend/go.mod b/backend/go.mod
new file mode 100644
index 0000000..47fbe40
--- /dev/null
+++ b/backend/go.mod
@@ -0,0 +1,50 @@
+module backend
+
+go 1.24.0
+
+require (
+	github.com/gin-contrib/cors v1.5.0
+	github.com/gin-contrib/gzip v1.2.5
+	github.com/gin-gonic/gin v1.11.0
+	github.com/golang-jwt/jwt/v5 v5.2.0
+	github.com/joho/godotenv v1.5.1
+	golang.org/x/crypto v0.43.0
+	gorm.io/driver/sqlite v1.5.4
+	gorm.io/gorm v1.25.5
+)
+
+require (
+	github.com/bytedance/gopkg v0.1.3 // indirect
+	github.com/bytedance/sonic v1.14.1 // indirect
+	github.com/bytedance/sonic/loader v0.3.0 // indirect
+	github.com/cloudwego/base64x v0.1.6 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.10 // indirect
+	github.com/gin-contrib/sse v1.1.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.28.0 // indirect
+	github.com/goccy/go-json v0.10.5 // indirect
+	github.com/goccy/go-yaml v1.18.0 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mattn/go-sqlite3 v1.14.17 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
+	github.com/quic-go/qpack v0.5.1 // indirect
+	github.com/quic-go/quic-go v0.55.0 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.3.0 // indirect
+	golang.org/x/arch v0.22.0 // indirect
+	golang.org/x/mod v0.29.0 // indirect
+	golang.org/x/net v0.46.0 // indirect
+	golang.org/x/sync v0.17.0 // indirect
+	golang.org/x/sys v0.37.0 // indirect
+	golang.org/x/text v0.30.0 // indirect
+	golang.org/x/tools v0.38.0 // indirect
+	google.golang.org/protobuf v1.36.10 // indirect
+)
diff --git a/backend/go.sum b/backend/go.sum
new file mode 100644
index 0000000..75ae538
--- /dev/null
+++ b/backend/go.sum
@@ -0,0 +1,109 @@
+github.com/bytedance/gopkg v0.1.3 h1:TPBSwH8RsouGCBcMBktLt1AymVo2TVsBVCY4b6TnZ/M=
+github.com/bytedance/gopkg v0.1.3/go.mod h1:576VvJ+eJgyCzdjS+c4+77QF3p7ubbtiKARP3TxducM=
+github.com/bytedance/sonic v1.14.1 h1:FBMC0zVz5XUmE4z9wF4Jey0An5FueFvOsTKKKtwIl7w=
+github.com/bytedance/sonic v1.14.1/go.mod h1:gi6uhQLMbTdeP0muCnrjHLeCUPyb70ujhnNlhOylAFc=
+github.com/bytedance/sonic/loader v0.3.0 h1:dskwH8edlzNMctoruo8FPTJDF3vLtDT0sXZwvZJyqeA=
+github.com/bytedance/sonic/loader v0.3.0/go.mod h1:N8A3vUdtUebEY2/VQC0MyhYeKUFosQU6FxH2JmUe6VI=
+github.com/cloudwego/base64x v0.1.6 h1:t11wG9AECkCDk5fMSoxmufanudBtJ+/HemLstXDLI2M=
+github.com/cloudwego/base64x v0.1.6/go.mod h1:OFcloc187FXDaYHvrNIjxSe8ncn0OOM8gEHfghB2IPU=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gabriel-vasile/mimetype v1.4.10 h1:zyueNbySn/z8mJZHLt6IPw0KoZsiQNszIpU+bX4+ZK0=
+github.com/gabriel-vasile/mimetype v1.4.10/go.mod h1:d+9Oxyo1wTzWdyVUPMmXFvp4F9tea18J8ufA774AB3s=
+github.com/gin-contrib/cors v1.5.0 h1:DgGKV7DDoOn36DFkNtbHrjoRiT5ExCe+PC9/xp7aKvk=
+github.com/gin-contrib/cors v1.5.0/go.mod h1:TvU7MAZ3EwrPLI2ztzTt3tqgvBCq+wn8WpZmfADjupI=
+github.com/gin-contrib/gzip v1.2.5 h1:fIZs0S+l17pIu1P5XRJOo/YNqfIuPCrZZ3TWB7pjckI=
+github.com/gin-contrib/gzip v1.2.5/go.mod h1:aomRgR7ftdZV3uWY0gW/m8rChfxau0n8YVvwlOHONzw=
+github.com/gin-contrib/sse v1.1.0 h1:n0w2GMuUpWDVp7qSpvze6fAu9iRxJY4Hmj6AmBOU05w=
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diff --git a/backend/internal/controller/analytics/analytics_controller.go b/backend/internal/controller/analytics/analytics_controller.go
new file mode 100644
index 0000000..e375ec3
--- /dev/null
+++ b/backend/internal/controller/analytics/analytics_controller.go
@@ -0,0 +1,92 @@
+package analytics
+
+import (
+	analyticsservice "backend/internal/service/analytics"
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+)
+
+// AnalyticsController 数据分析控制器 // Logan.Li
+type AnalyticsController struct {
+	svc *analyticsservice.AnalyticsService
+}
+
+// NewAnalyticsController 创建控制器实例 // Logan.Li
+func NewAnalyticsController(db *gorm.DB) *AnalyticsController {
+	return &AnalyticsController{svc: analyticsservice.NewAnalyticsService(db)}
+}
+
+// GetDashboardStats 仪表板统计 // Logan.Li
+func (ctrl *AnalyticsController) GetDashboardStats(c *gin.Context) {
+	stats, err := ctrl.svc.GetDashboardStats()
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": stats})
+}
+
+// GetExpiringLicenses 即将到期 License // Logan.Li
+func (ctrl *AnalyticsController) GetExpiringLicenses(c *gin.Context) {
+	days, _ := strconv.Atoi(c.DefaultQuery("days", "30"))
+	licenses, err := ctrl.svc.GetExpiringLicenses(days)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": licenses})
+}
+
+// GetRecentActivities 最近活动 // Logan.Li
+func (ctrl *AnalyticsController) GetRecentActivities(c *gin.Context) {
+	limit, _ := strconv.Atoi(c.DefaultQuery("limit", "10"))
+	activities, err := ctrl.svc.GetRecentActivities(limit)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": activities})
+}
+
+// GetOnlineStats 在线统计 // Logan.Li
+func (ctrl *AnalyticsController) GetOnlineStats(c *gin.Context) {
+	stats, err := ctrl.svc.GetOnlineStats()
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": stats})
+}
+
+// GetRevenueStats 收入统计 // Logan.Li
+func (ctrl *AnalyticsController) GetRevenueStats(c *gin.Context) {
+	stats, err := ctrl.svc.GetRevenueStats()
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": stats})
+}
+
+// GetLicenseGrowth License 增长趋势 // Logan.Li
+func (ctrl *AnalyticsController) GetLicenseGrowth(c *gin.Context) {
+	stats, err := ctrl.svc.GetLicenseGrowth()
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": stats})
+}
+
+// GetProductDistribution 产品分布 // Logan.Li
+func (ctrl *AnalyticsController) GetProductDistribution(c *gin.Context) {
+	stats, err := ctrl.svc.GetProductDistribution()
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": stats})
+}
diff --git a/backend/internal/controller/auth/auth_controller.go b/backend/internal/controller/auth/auth_controller.go
new file mode 100644
index 0000000..81ae285
--- /dev/null
+++ b/backend/internal/controller/auth/auth_controller.go
@@ -0,0 +1,76 @@
+package auth
+
+import (
+	"backend/config"
+	authservice "backend/internal/service/auth"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+)
+
+// AuthController 认证控制器 // Logan.Li
+type AuthController struct {
+	authService *authservice.AuthService
+}
+
+// NewAuthController 创建控制器实例 // Logan.Li
+func NewAuthController(db *gorm.DB, cfg *config.Config) *AuthController {
+	return &AuthController{
+		authService: authservice.NewAuthService(db, cfg),
+	}
+}
+
+// Login 管理员登录 // Logan.Li
+func (ctrl *AuthController) Login(c *gin.Context) {
+	var req struct {
+		Username string `json:"username" binding:"required"`
+		Password string `json:"password" binding:"required"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "请求参数错误: " + err.Error()})
+		return
+	}
+
+	result, err := ctrl.authService.Login(req)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "登录成功", "data": result})
+}
+
+// Me 获取当前登录用户信息 // Logan.Li
+func (ctrl *AuthController) Me(c *gin.Context) {
+	userID, _ := c.Get("user_id")
+
+	userInfo, err := ctrl.authService.GetCurrentUser(userID.(uint))
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": userInfo})
+}
+
+// ChangePassword 修改当前用户密码 // Logan.Li
+func (ctrl *AuthController) ChangePassword(c *gin.Context) {
+	userID, _ := c.Get("user_id")
+
+	var req struct {
+		OldPassword string `json:"old_password" binding:"required"`
+		NewPassword string `json:"new_password" binding:"required,min=6"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "请求参数错误: " + err.Error()})
+		return
+	}
+
+	if err := ctrl.authService.ChangePassword(userID.(uint), req); err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "密码修改成功"})
+}
diff --git a/backend/internal/controller/customer/customer_controller.go b/backend/internal/controller/customer/customer_controller.go
new file mode 100644
index 0000000..654c8fd
--- /dev/null
+++ b/backend/internal/controller/customer/customer_controller.go
@@ -0,0 +1,135 @@
+package customer
+
+import (
+	customerservice "backend/internal/service/customer"
+	"backend/utils"
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+)
+
+// CustomerController 客户控制器 // Logan.Li
+type CustomerController struct {
+	svc *customerservice.CustomerService
+	db  *gorm.DB
+}
+
+// NewCustomerController 创建控制器实例 // Logan.Li
+func NewCustomerController(db *gorm.DB) *CustomerController {
+	return &CustomerController{svc: customerservice.NewCustomerService(db), db: db}
+}
+
+// List 客户列表 // Logan.Li
+func (ctrl *CustomerController) List(c *gin.Context) {
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "10"))
+	keyword := c.Query("keyword")
+
+	customers, total, err := ctrl.svc.List(page, pageSize, keyword)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": gin.H{
+		"list": customers, "total": total, "page": page, "page_size": pageSize,
+		"total_pages": (total + int64(pageSize) - 1) / int64(pageSize),
+	}})
+}
+
+// GetAll 全部客户 // Logan.Li
+func (ctrl *CustomerController) GetAll(c *gin.Context) {
+	customers, err := ctrl.svc.GetAll()
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": customers})
+}
+
+// Get 客户详情 // Logan.Li
+func (ctrl *CustomerController) Get(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	customer, err := ctrl.svc.GetByID(uint(id))
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 404, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": customer})
+}
+
+// Create 创建客户 // Logan.Li
+func (ctrl *CustomerController) Create(c *gin.Context) {
+	var req struct {
+		Name    string `json:"name" binding:"required"`
+		Company string `json:"company"`
+		Email   string `json:"email" binding:"omitempty,email"`
+		Phone   string `json:"phone"`
+		Address string `json:"address"`
+		Notes   string `json:"notes"`
+		Status  *int   `json:"status"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误: " + err.Error()})
+		return
+	}
+	customer, err := ctrl.svc.Create(req)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "create", "customer", customer.ID, customer.Name, "", "", "创建客户")
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "创建成功", "data": customer})
+}
+
+// Update 更新客户 // Logan.Li
+func (ctrl *CustomerController) Update(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	var req struct {
+		Name    string `json:"name"`
+		Company string `json:"company"`
+		Email   string `json:"email" binding:"omitempty,email"`
+		Phone   string `json:"phone"`
+		Address string `json:"address"`
+		Notes   string `json:"notes"`
+		Status  *int   `json:"status"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误"})
+		return
+	}
+	customer, err := ctrl.svc.Update(uint(id), req)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "update", "customer", customer.ID, customer.Name, "", "", "更新客户")
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "更新成功", "data": customer})
+}
+
+// Delete 删除客户 // Logan.Li
+func (ctrl *CustomerController) Delete(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	if err := ctrl.svc.Delete(uint(id)); err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "delete", "customer", uint(id), "", "", "", "删除客户")
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "删除成功"})
+}
+
+// UpdateStatus 切换状态 // Logan.Li
+func (ctrl *CustomerController) UpdateStatus(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	var req struct {
+		Status int `json:"status"`
+	}
+	c.ShouldBindJSON(&req)
+	if err := ctrl.svc.UpdateStatus(uint(id), req.Status); err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "update_status", "customer", uint(id), "", "", "", "切换客户状态")
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "状态更新成功"})
+}
diff --git a/backend/internal/controller/entitlement/entitlement_controller.go b/backend/internal/controller/entitlement/entitlement_controller.go
new file mode 100644
index 0000000..a787605
--- /dev/null
+++ b/backend/internal/controller/entitlement/entitlement_controller.go
@@ -0,0 +1,96 @@
+package entitlement
+
+import (
+	entitlementservice "backend/internal/service/entitlement"
+	"backend/utils"
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+)
+
+// EntitlementController 客户权益控制器 // Logan.Li
+type EntitlementController struct {
+	svc *entitlementservice.EntitlementService
+	db  *gorm.DB
+}
+
+// NewEntitlementController 创建控制器实例 // Logan.Li
+func NewEntitlementController(db *gorm.DB) *EntitlementController {
+	return &EntitlementController{svc: entitlementservice.NewEntitlementService(db), db: db}
+}
+
+// List 权益列表 // Logan.Li
+func (ctrl *EntitlementController) List(c *gin.Context) {
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "10"))
+	customerID, _ := strconv.ParseUint(c.Query("customer_id"), 10, 32)
+	productID, _ := strconv.ParseUint(c.Query("product_id"), 10, 32)
+
+	entitlements, total, err := ctrl.svc.List(page, pageSize, uint(customerID), uint(productID))
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": gin.H{
+		"list": entitlements, "total": total, "page": page, "page_size": pageSize,
+		"total_pages": (total + int64(pageSize) - 1) / int64(pageSize),
+	}})
+}
+
+// Get 权益详情 // Logan.Li
+func (ctrl *EntitlementController) Get(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	ent, err := ctrl.svc.GetByID(uint(id))
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 404, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": ent})
+}
+
+// Revoke 吊销权益 // Logan.Li
+func (ctrl *EntitlementController) Revoke(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	if err := ctrl.svc.Revoke(uint(id)); err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "revoke", "entitlement", uint(id), "", "", "", "吊销客户权益")
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "权益已吊销"})
+}
+
+// Renew 续费权益 // Logan.Li
+func (ctrl *EntitlementController) Renew(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	var req struct {
+		PlanID uint `json:"plan_id" binding:"required"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误"})
+		return
+	}
+	ent, err := ctrl.svc.Renew(uint(id), req.PlanID)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "renew", "entitlement", ent.ID, "", "", "", "续费客户权益")
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "续费成功", "data": ent})
+}
+
+// GetByEmail 按邮箱查询客户权益（客户端接口） // Logan.Li
+func (ctrl *EntitlementController) GetByEmail(c *gin.Context) {
+	email := c.Query("email")
+	if email == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "缺少 email 参数"})
+		return
+	}
+	entitlements, err := ctrl.svc.GetByEmail(email)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": entitlements})
+}
diff --git a/backend/internal/controller/license/client_controller.go b/backend/internal/controller/license/client_controller.go
new file mode 100644
index 0000000..07b04e3
--- /dev/null
+++ b/backend/internal/controller/license/client_controller.go
@@ -0,0 +1,79 @@
+package license
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+// Verify 客户端 License 验证 // Logan.Li
+func (ctrl *LicenseController) Verify(c *gin.Context) {
+	var req struct {
+		LicenseKey string `json:"license_key" binding:"required"`
+		DeviceID   string `json:"device_id"`
+		DeviceName string `json:"device_name"`
+		DeviceInfo string `json:"device_info"`
+		ProductID  uint   `json:"product_id"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误: " + err.Error()})
+		return
+	}
+	resp, _ := ctrl.svc.Verify(req)
+	c.JSON(http.StatusOK, resp)
+}
+
+// ActivateDevice 客户端激活（机器绑定） // Logan.Li
+func (ctrl *LicenseController) ActivateDevice(c *gin.Context) {
+	var req struct {
+		LicenseKey string `json:"license_key" binding:"required"`
+		DeviceID   string `json:"device_id" binding:"required"`
+		DeviceName string `json:"device_name"`
+		DeviceInfo string `json:"device_info"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误: " + err.Error()})
+		return
+	}
+	data, err := ctrl.svc.Activate(req, c.ClientIP())
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "激活成功", "data": data})
+}
+
+// Deactivate 客户端停用 // Logan.Li
+func (ctrl *LicenseController) Deactivate(c *gin.Context) {
+	var req struct {
+		LicenseKey string `json:"license_key" binding:"required"`
+		DeviceID   string `json:"device_id" binding:"required"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误"})
+		return
+	}
+	if err := ctrl.svc.Deactivate(req); err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "停用成功"})
+}
+
+// Heartbeat 客户端心跳 // Logan.Li
+func (ctrl *LicenseController) Heartbeat(c *gin.Context) {
+	var req struct {
+		LicenseKey string `json:"license_key" binding:"required"`
+		DeviceID   string `json:"device_id" binding:"required"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误"})
+		return
+	}
+	data, err := ctrl.svc.Heartbeat(req)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "心跳成功", "data": data})
+}
diff --git a/backend/internal/controller/license/license_controller.go b/backend/internal/controller/license/license_controller.go
new file mode 100644
index 0000000..056a23a
--- /dev/null
+++ b/backend/internal/controller/license/license_controller.go
@@ -0,0 +1,211 @@
+package license
+
+import (
+	licenseservice "backend/internal/service/license"
+	"backend/utils"
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+)
+
+// LicenseController License 控制器 // Logan.Li
+type LicenseController struct {
+	svc *licenseservice.LicenseService
+	db  *gorm.DB
+}
+
+// NewLicenseController 创建控制器实例 // Logan.Li
+func NewLicenseController(db *gorm.DB) *LicenseController {
+	return &LicenseController{svc: licenseservice.NewLicenseService(db), db: db}
+}
+
+// parseListQuery 从请求解析筛选参数 // Logan.Li
+func parseListQuery(c *gin.Context) licenseservice.ListQuery {
+	q := licenseservice.ListQuery{
+		Keyword: c.Query("keyword"),
+		Status:  c.Query("status"),
+	}
+	if v, err := strconv.ParseUint(c.Query("customer_id"), 10, 32); err == nil {
+		q.CustomerID = uint(v)
+	}
+	if v, err := strconv.ParseUint(c.Query("product_id"), 10, 32); err == nil {
+		q.ProductID = uint(v)
+	}
+	return q
+}
+
+// List License 列表 // Logan.Li
+func (ctrl *LicenseController) List(c *gin.Context) {
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "10"))
+
+	licenses, total, err := ctrl.svc.List(page, pageSize, parseListQuery(c))
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": gin.H{
+		"list": licenses, "total": total, "page": page, "page_size": pageSize,
+		"total_pages": (total + int64(pageSize) - 1) / int64(pageSize),
+	}})
+}
+
+// Get License 详情 // Logan.Li
+func (ctrl *LicenseController) Get(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	lic, activations, err := ctrl.svc.GetByID(uint(id))
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 404, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": gin.H{"license": lic, "activations": activations}})
+}
+
+// Create 创建 License // Logan.Li
+func (ctrl *LicenseController) Create(c *gin.Context) {
+	var req struct {
+		CustomerID     uint   `json:"customer_id" binding:"required"`
+		ProductID      uint   `json:"product_id" binding:"required"`
+		Duration       int    `json:"duration" binding:"required"`
+		MaxActivations int    `json:"max_activations"`
+		IsTrial        bool   `json:"is_trial"`
+		TrialDays      int    `json:"trial_days"`
+		Notes          string `json:"notes"`
+		Count          int    `json:"count"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误: " + err.Error()})
+		return
+	}
+	licenses, err := ctrl.svc.Create(req)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "create", "license", licenses[0].ID, licenses[0].LicenseKey, "", "",
+		"创建 "+strconv.Itoa(len(licenses))+" 个 License")
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "创建成功", "data": licenses})
+}
+
+// Update 更新 License // Logan.Li
+func (ctrl *LicenseController) Update(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	var updates map[string]interface{}
+	if err := c.ShouldBindJSON(&updates); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误"})
+		return
+	}
+	lic, err := ctrl.svc.Update(uint(id), updates)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "update", "license", lic.ID, lic.LicenseKey, "", "", "更新 License")
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "更新成功", "data": lic})
+}
+
+// Delete 删除 License // Logan.Li
+func (ctrl *LicenseController) Delete(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	lic, err := ctrl.svc.Delete(uint(id))
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "delete", "license", lic.ID, lic.LicenseKey, "", "", "删除 License")
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "删除成功"})
+}
+
+// Renew 续期 // Logan.Li
+func (ctrl *LicenseController) Renew(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	var req struct {
+		Duration int `json:"duration" binding:"required"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误"})
+		return
+	}
+	lic, err := ctrl.svc.Renew(uint(id), req.Duration)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "renew", "license", lic.ID, lic.LicenseKey, "", "", "续期 License")
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "续期成功", "data": lic})
+}
+
+// Revoke 吊销 // Logan.Li
+func (ctrl *LicenseController) Revoke(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	var req struct {
+		Reason string `json:"reason"`
+	}
+	c.ShouldBindJSON(&req)
+	lic, err := ctrl.svc.Revoke(uint(id), req.Reason)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "revoke", "license", lic.ID, lic.LicenseKey, "", "", "吊销 License: "+req.Reason)
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "已吊销", "data": lic})
+}
+
+// Suspend 暂停 // Logan.Li
+func (ctrl *LicenseController) Suspend(c *gin.Context) {
+	ctrl.setStatus(c, "suspended")
+}
+
+// Activate 激活（管理后台） // Logan.Li
+func (ctrl *LicenseController) Activate(c *gin.Context) {
+	ctrl.setStatus(c, "active")
+}
+
+// setStatus 通用状态切换 // Logan.Li
+func (ctrl *LicenseController) setStatus(c *gin.Context, status string) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	lic, err := ctrl.svc.SetStatus(uint(id), status)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, status, "license", lic.ID, lic.LicenseKey, "", "", "License 状态变更为 "+status)
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "操作成功", "data": lic})
+}
+
+// GetActivations 获取激活记录 // Logan.Li
+func (ctrl *LicenseController) GetActivations(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	activations, err := ctrl.svc.GetActivations(uint(id))
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": activations})
+}
+
+// ForceOffline 强制下线 // Logan.Li
+func (ctrl *LicenseController) ForceOffline(c *gin.Context) {
+	licenseID, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	activationID, _ := strconv.ParseUint(c.Param("activationId"), 10, 32)
+	if err := ctrl.svc.ForceOffline(uint(licenseID), uint(activationID)); err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "force_offline", "activation", uint(activationID), "", "", "", "强制下线设备")
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "强制下线成功"})
+}
+
+// Export 导出 CSV // Logan.Li
+func (ctrl *LicenseController) Export(c *gin.Context) {
+	csv, err := ctrl.svc.ExportCSV(parseListQuery(c))
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	c.Header("Content-Type", "text/csv; charset=utf-8")
+	c.Header("Content-Disposition", "attachment; filename=licenses.csv")
+	c.String(http.StatusOK, csv)
+}
diff --git a/backend/internal/controller/order/order_controller.go b/backend/internal/controller/order/order_controller.go
new file mode 100644
index 0000000..a51c0bc
--- /dev/null
+++ b/backend/internal/controller/order/order_controller.go
@@ -0,0 +1,164 @@
+package order
+
+import (
+	"backend/internal/dto"
+	orderservice "backend/internal/service/order"
+	"backend/utils"
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+)
+
+// OrderController 订单控制器 // Logan.Li
+type OrderController struct {
+	svc *orderservice.OrderService
+	db  *gorm.DB
+}
+
+// NewOrderController 创建控制器实例 // Logan.Li
+func NewOrderController(db *gorm.DB) *OrderController {
+	return &OrderController{svc: orderservice.NewOrderService(db), db: db}
+}
+
+// List 订单列表（管理后台） // Logan.Li
+func (ctrl *OrderController) List(c *gin.Context) {
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "10"))
+	status := c.Query("status")
+	productID, _ := strconv.ParseUint(c.Query("product_id"), 10, 32)
+
+	orders, total, err := ctrl.svc.List(page, pageSize, status, uint(productID))
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": gin.H{
+		"list": orders, "total": total, "page": page, "page_size": pageSize,
+		"total_pages": (total + int64(pageSize) - 1) / int64(pageSize),
+	}})
+}
+
+// GetDetail 订单详情 // Logan.Li
+func (ctrl *OrderController) GetDetail(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	order, err := ctrl.svc.GetByID(uint(id))
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 404, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": order})
+}
+
+// CreateOrder 客户端下单（公开接口） // Logan.Li
+func (ctrl *OrderController) CreateOrder(c *gin.Context) {
+	var req struct {
+		CustomerEmail string `json:"customer_email" binding:"required,email"`
+		CustomerName  string `json:"customer_name"`
+		ProductID     uint   `json:"product_id" binding:"required"`
+		PlanID        uint   `json:"plan_id" binding:"required"`
+		DeviceID      string `json:"device_id"`
+		ReturnURL     string `json:"return_url"`
+		CancelURL     string `json:"cancel_url"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误: " + err.Error()})
+		return
+	}
+	resp, err := ctrl.svc.CreateOrder(req, utils.GetClientIP(c), c.GetHeader("User-Agent"))
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 2001, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "订单创建成功", "data": resp})
+}
+
+// PaymentWebhook 支付回调（公开接口，供支付渠道调用） // Logan.Li
+func (ctrl *OrderController) PaymentWebhook(c *gin.Context) {
+	var req struct {
+		EventType      string  `json:"event_type" binding:"required"`
+		OrderNo        string  `json:"order_no" binding:"required"`
+		GatewayOrderNo string  `json:"gateway_order_no"`
+		Status         string  `json:"status" binding:"required"`
+		Amount         float64 `json:"amount"`
+		Currency       string  `json:"currency"`
+		CustomerEmail  string  `json:"customer_email"`
+		Gateway        string  `json:"gateway" binding:"required"`
+		Signature      string  `json:"signature"`
+		Payload        string  `json:"payload"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "Invalid payload"})
+		return
+	}
+	if err := ctrl.svc.PaymentWebhook(req, utils.GetClientIP(c)); err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "Webhook processed"})
+}
+
+// ManualGrant 手动发放 License（管理后台） // Logan.Li
+func (ctrl *OrderController) ManualGrant(c *gin.Context) {
+	var req struct {
+		CustomerEmail string `json:"customer_email" binding:"required,email"`
+		CustomerName  string `json:"customer_name"`
+		ProductID     uint   `json:"product_id" binding:"required"`
+		PlanID        uint   `json:"plan_id" binding:"required"`
+		DeviceID      string `json:"device_id"`
+		Notes         string `json:"notes"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误: " + err.Error()})
+		return
+	}
+	userID, _ := c.Get("user_id")
+	username, _ := c.Get("username")
+	data, err := ctrl.svc.ManualGrant(req, userID.(uint), username.(string), utils.GetClientIP(c))
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "License 发放成功", "data": data})
+}
+
+// CheckDuplicatePurchase 防重复购买检测（公开接口） // Logan.Li
+func (ctrl *OrderController) CheckDuplicatePurchase(c *gin.Context) {
+	var req struct {
+		CustomerEmail string `json:"customer_email" binding:"required,email"`
+		ProductID     uint   `json:"product_id" binding:"required"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误"})
+		return
+	}
+	// 通过 CheckPurchaseStatus 间接判断：有记录且有效则不允许重复购买 // Logan.Li
+	status, _ := ctrl.svc.CheckPurchaseStatus(req.CustomerEmail, req.ProductID)
+	result := dto.DuplicatePurchaseCheckResponse{AllowPurchase: true}
+	if status.HasActiveLicense {
+		result.AllowPurchase = false
+		result.Reason = status.Message
+		if result.Reason == "" {
+			result.Reason = "您已拥有该产品的有效授权"
+		}
+		result.ExistingLicenseKey = status.LicenseKey
+		result.ExistingPlanType = status.PlanType
+		result.CanUpgrade = true
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": result})
+}
+
+// CheckPurchaseStatus 查询购买状态（公开接口） // Logan.Li
+func (ctrl *OrderController) CheckPurchaseStatus(c *gin.Context) {
+	var req struct {
+		CustomerEmail string `json:"customer_email" binding:"required,email"`
+		ProductID     uint   `json:"product_id" binding:"required"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误"})
+		return
+	}
+	resp, _ := ctrl.svc.CheckPurchaseStatus(req.CustomerEmail, req.ProductID)
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": resp})
+}
diff --git a/backend/internal/controller/plan/plan_controller.go b/backend/internal/controller/plan/plan_controller.go
new file mode 100644
index 0000000..e05f670
--- /dev/null
+++ b/backend/internal/controller/plan/plan_controller.go
@@ -0,0 +1,129 @@
+package plan
+
+import (
+	planservice "backend/internal/service/plan"
+	"backend/utils"
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+)
+
+// PlanController 定价计划控制器 // Logan.Li
+type PlanController struct {
+	svc *planservice.PlanService
+	db  *gorm.DB
+}
+
+// NewPlanController 创建控制器实例 // Logan.Li
+func NewPlanController(db *gorm.DB) *PlanController {
+	return &PlanController{svc: planservice.NewPlanService(db), db: db}
+}
+
+// List 计划列表 // Logan.Li
+func (ctrl *PlanController) List(c *gin.Context) {
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "10"))
+	productID, _ := strconv.ParseUint(c.Query("product_id"), 10, 32)
+
+	plans, total, err := ctrl.svc.List(page, pageSize, uint(productID))
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": gin.H{
+		"list": plans, "total": total, "page": page, "page_size": pageSize,
+		"total_pages": (total + int64(pageSize) - 1) / int64(pageSize),
+	}})
+}
+
+// GetByProduct 查询某产品的上架计划（公开接口） // Logan.Li
+func (ctrl *PlanController) GetByProduct(c *gin.Context) {
+	productID, _ := strconv.ParseUint(c.Param("product_id"), 10, 32)
+	plans, err := ctrl.svc.GetByProduct(uint(productID))
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": plans})
+}
+
+// Create 创建计划 // Logan.Li
+func (ctrl *PlanController) Create(c *gin.Context) {
+	var req struct {
+		ProductID  uint     `json:"product_id" binding:"required"`
+		Name       string   `json:"name" binding:"required"`
+		PlanType   string   `json:"plan_type" binding:"required"`
+		Price      float64  `json:"price" binding:"required"`
+		Currency   string   `json:"currency"`
+		Duration   int      `json:"duration"`
+		MaxDevices int      `json:"max_devices"`
+		Features   []string `json:"features"`
+		SortOrder  int      `json:"sort_order"`
+		Status     *int     `json:"status"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误: " + err.Error()})
+		return
+	}
+	plan, err := ctrl.svc.Create(req)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "create", "plan", plan.ID, plan.Name, "", "", "创建定价计划")
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "创建成功", "data": plan})
+}
+
+// Update 更新计划 // Logan.Li
+func (ctrl *PlanController) Update(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	var req struct {
+		Name       string   `json:"name"`
+		Price      *float64 `json:"price"`
+		Currency   string   `json:"currency"`
+		Duration   *int     `json:"duration"`
+		MaxDevices *int     `json:"max_devices"`
+		Features   []string `json:"features"`
+		SortOrder  *int     `json:"sort_order"`
+		Status     *int     `json:"status"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误"})
+		return
+	}
+	plan, err := ctrl.svc.Update(uint(id), req)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "update", "plan", plan.ID, plan.Name, "", "", "更新定价计划")
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "更新成功", "data": plan})
+}
+
+// Delete 删除计划 // Logan.Li
+func (ctrl *PlanController) Delete(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	if err := ctrl.svc.Delete(uint(id)); err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "delete", "plan", uint(id), "", "", "", "删除定价计划")
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "删除成功"})
+}
+
+// ToggleStatus 切换上下架 // Logan.Li
+func (ctrl *PlanController) ToggleStatus(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	var req struct {
+		Status int `json:"status"`
+	}
+	c.ShouldBindJSON(&req)
+	if err := ctrl.svc.ToggleStatus(uint(id), req.Status); err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "toggle_status", "plan", uint(id), "", "", "", "切换计划状态")
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "状态更新成功"})
+}
diff --git a/backend/internal/controller/product/product_controller.go b/backend/internal/controller/product/product_controller.go
new file mode 100644
index 0000000..257196e
--- /dev/null
+++ b/backend/internal/controller/product/product_controller.go
@@ -0,0 +1,137 @@
+package product
+
+import (
+	productservice "backend/internal/service/product"
+	"backend/utils"
+	"fmt"
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+)
+
+// ProductController 产品控制器 // Logan.Li
+type ProductController struct {
+	svc *productservice.ProductService
+	db  *gorm.DB
+}
+
+// NewProductController 创建控制器实例 // Logan.Li
+func NewProductController(db *gorm.DB) *ProductController {
+	return &ProductController{svc: productservice.NewProductService(db), db: db}
+}
+
+// List 产品列表 // Logan.Li
+func (ctrl *ProductController) List(c *gin.Context) {
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "10"))
+	keyword := c.Query("keyword")
+
+	products, total, err := ctrl.svc.List(page, pageSize, keyword)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": gin.H{
+		"list": products, "total": total, "page": page, "page_size": pageSize,
+		"total_pages": (total + int64(pageSize) - 1) / int64(pageSize),
+	}})
+}
+
+// GetAll 全部产品（下拉用） // Logan.Li
+func (ctrl *ProductController) GetAll(c *gin.Context) {
+	products, err := ctrl.svc.GetAll()
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": products})
+}
+
+// Get 产品详情 // Logan.Li
+func (ctrl *ProductController) Get(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	product, err := ctrl.svc.GetByID(uint(id))
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 404, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": product})
+}
+
+// Create 创建产品 // Logan.Li
+func (ctrl *ProductController) Create(c *gin.Context) {
+	var req struct {
+		Name        string   `json:"name" binding:"required"`
+		Code        string   `json:"code" binding:"required"`
+		Version     string   `json:"version"`
+		Description string   `json:"description"`
+		Features    []string `json:"features"`
+		Price       float64  `json:"price"`
+		PriceModel  string   `json:"price_model"`
+		Status      *int     `json:"status"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误: " + err.Error()})
+		return
+	}
+	product, err := ctrl.svc.Create(req)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "create", "product", product.ID, product.Name, "", "", "创建产品")
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "创建成功", "data": product})
+}
+
+// Update 更新产品 // Logan.Li
+func (ctrl *ProductController) Update(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	var req struct {
+		Name        string   `json:"name"`
+		Version     string   `json:"version"`
+		Description string   `json:"description"`
+		Features    []string `json:"features"`
+		Price       *float64 `json:"price"`
+		PriceModel  string   `json:"price_model"`
+		Status      *int     `json:"status"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误"})
+		return
+	}
+	product, err := ctrl.svc.Update(uint(id), req)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "update", "product", product.ID, product.Name, "", "", "更新产品")
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "更新成功", "data": product})
+}
+
+// Delete 删除产品 // Logan.Li
+func (ctrl *ProductController) Delete(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	if err := ctrl.svc.Delete(uint(id)); err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "delete", "product", uint(id), "", "", "", "删除产品")
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "删除成功"})
+}
+
+// UpdateStatus 切换上下架 // Logan.Li
+func (ctrl *ProductController) UpdateStatus(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	var req struct {
+		Status int `json:"status"`
+	}
+	c.ShouldBindJSON(&req)
+	if err := ctrl.svc.UpdateStatus(uint(id), req.Status); err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "update_status", "product", uint(id), "", "", "", fmt.Sprintf("切换状态为 %d", req.Status))
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "状态更新成功"})
+}
diff --git a/backend/internal/controller/setting/setting_controller.go b/backend/internal/controller/setting/setting_controller.go
new file mode 100644
index 0000000..49ee005
--- /dev/null
+++ b/backend/internal/controller/setting/setting_controller.go
@@ -0,0 +1,115 @@
+package setting
+
+import (
+	"backend/internal/model"
+	settingservice "backend/internal/service/setting"
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+)
+
+// SettingController 系统设置控制器 // Logan.Li
+type SettingController struct {
+	svc *settingservice.SettingService
+}
+
+// NewSettingController 创建控制器实例 // Logan.Li
+func NewSettingController(db *gorm.DB) *SettingController {
+	return &SettingController{svc: settingservice.NewSettingService(db)}
+}
+
+// Get 获取系统设置 // Logan.Li
+func (ctrl *SettingController) Get(c *gin.Context) {
+	setting, err := ctrl.svc.Get()
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 404, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": setting})
+}
+
+// Update 更新系统设置 // Logan.Li
+func (ctrl *SettingController) Update(c *gin.Context) {
+	var req struct {
+		SystemName            *string `json:"system_name"`
+		DefaultDuration       *int    `json:"default_duration"`
+		DefaultMaxActivations *int    `json:"default_max_activations"`
+		ExpireReminderDays    *int    `json:"expire_reminder_days"`
+		APIRateLimit          *int    `json:"api_rate_limit"`
+		LogRetentionDays      *int    `json:"log_retention_days"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误"})
+		return
+	}
+	setting, err := ctrl.svc.Update(req)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "更新成功", "data": setting})
+}
+
+// ListAuditLogs 审计日志列表 // Logan.Li
+func (ctrl *SettingController) ListAuditLogs(c *gin.Context) {
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "10"))
+	action := c.Query("action")
+	targetType := c.Query("target_type")
+
+	logs, total, err := ctrl.svc.ListAuditLogs(page, pageSize, action, targetType)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": gin.H{
+		"list": logs, "total": total, "page": page, "page_size": pageSize,
+		"total_pages": (total + int64(pageSize) - 1) / int64(pageSize),
+	}})
+}
+
+// ClearAuditLogs 清空审计日志 // Logan.Li
+func (ctrl *SettingController) ClearAuditLogs(c *gin.Context) {
+	if err := ctrl.svc.ClearAuditLogs(); err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "日志已清空"})
+}
+
+// ListLicenseTemplates 查询 License 模板 // Logan.Li
+func (ctrl *SettingController) ListLicenseTemplates(c *gin.Context) {
+	templates, err := ctrl.svc.ListLicenseTemplates()
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": templates})
+}
+
+// SaveLicenseTemplate 创建/更新 License 模板 // Logan.Li
+func (ctrl *SettingController) SaveLicenseTemplate(c *gin.Context) {
+	var tmpl model.LicenseTemplate
+	if err := c.ShouldBindJSON(&tmpl); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误"})
+		return
+	}
+	result, err := ctrl.svc.SaveLicenseTemplate(tmpl)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "保存成功", "data": result})
+}
+
+// DeleteLicenseTemplate 删除 License 模板 // Logan.Li
+func (ctrl *SettingController) DeleteLicenseTemplate(c *gin.Context) {
+	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
+	if err := ctrl.svc.DeleteLicenseTemplate(uint(id)); err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "删除成功"})
+}
diff --git a/backend/internal/dto/analytics.go b/backend/internal/dto/analytics.go
new file mode 100644
index 0000000..f55be8a
--- /dev/null
+++ b/backend/internal/dto/analytics.go
@@ -0,0 +1,76 @@
+package dto
+
+// DashboardStats 仪表板统计响应 // Logan.Li
+type DashboardStats struct {
+	TotalLicenses  int64   `json:"total_licenses"`
+	ActiveLicenses int64   `json:"active_licenses"`
+	NewThisMonth   int64   `json:"new_this_month"`
+	ExpiringSoon   int64   `json:"expiring_soon"`
+	TotalCustomers int64   `json:"total_customers"`
+	TotalProducts  int64   `json:"total_products"`
+	OnlineDevices  int64   `json:"online_devices"`
+	MonthlyRevenue float64 `json:"monthly_revenue"`
+}
+
+// ExpiringLicenseItem 即将到期 License // Logan.Li
+type ExpiringLicenseItem struct {
+	ID           uint   `json:"id"`
+	LicenseKey   string `json:"license_key"`
+	CustomerName string `json:"customer_name"`
+	ProductName  string `json:"product_name"`
+	EndDate      string `json:"end_date"`
+	DaysLeft     int    `json:"days_left"`
+}
+
+// RecentActivityItem 最近活动 // Logan.Li
+type RecentActivityItem struct {
+	ID         uint   `json:"id"`
+	Username   string `json:"username"`
+	Action     string `json:"action"`
+	TargetType string `json:"target_type"`
+	TargetName string `json:"target_name"`
+	Detail     string `json:"detail"`
+	CreatedAt  string `json:"created_at"`
+}
+
+// LicenseGrowthPoint License 增长趋势点 // Logan.Li
+type LicenseGrowthPoint struct {
+	Date  string `json:"date"`
+	Count int64  `json:"count"`
+}
+
+// RevenuePoint 收入趋势点 // Logan.Li
+type RevenuePoint struct {
+	Period string  `json:"period"`
+	Amount float64 `json:"amount"`
+}
+
+// ProductDistribution 产品分布 // Logan.Li
+type ProductDistribution struct {
+	ProductName string `json:"product_name"`
+	Count       int64  `json:"count"`
+}
+
+// SettingUpdate 更新系统设置请求 // Logan.Li
+type SettingUpdate struct {
+	SystemName            *string `json:"system_name"`
+	DefaultDuration       *int    `json:"default_duration"`
+	DefaultMaxActivations *int    `json:"default_max_activations"`
+	ExpireReminderDays    *int    `json:"expire_reminder_days"`
+	APIRateLimit          *int    `json:"api_rate_limit"`
+	LogRetentionDays      *int    `json:"log_retention_days"`
+}
+
+// AuditLogResponse 操作日志响应 // Logan.Li
+type AuditLogResponse struct {
+	ID         uint   `json:"id"`
+	Username   string `json:"username"`
+	Action     string `json:"action"`
+	TargetType string `json:"target_type"`
+	TargetID   uint   `json:"target_id"`
+	TargetName string `json:"target_name"`
+	Detail     string `json:"detail"`
+	Result     string `json:"result"`
+	IP         string `json:"ip"`
+	CreatedAt  string `json:"created_at"`
+}
diff --git a/backend/internal/dto/auth.go b/backend/internal/dto/auth.go
new file mode 100644
index 0000000..7357c40
--- /dev/null
+++ b/backend/internal/dto/auth.go
@@ -0,0 +1,28 @@
+package dto
+
+// LoginRequest 登录请求 // Logan.Li
+type LoginRequest struct {
+	Username string `json:"username" binding:"required"`
+	Password string `json:"password" binding:"required"`
+}
+
+// LoginResponse 登录响应 // Logan.Li
+type LoginResponse struct {
+	Token    string         `json:"token"`
+	UserInfo UserInfoResponse `json:"user_info"`
+}
+
+// UserInfoResponse 用户信息响应 // Logan.Li
+type UserInfoResponse struct {
+	ID       uint   `json:"id"`
+	Username string `json:"username"`
+	Email    string `json:"email"`
+	Avatar   string `json:"avatar"`
+	Role     string `json:"role"`
+}
+
+// ChangePasswordRequest 修改密码请求 // Logan.Li
+type ChangePasswordRequest struct {
+	OldPassword string `json:"old_password" binding:"required"`
+	NewPassword string `json:"new_password" binding:"required,min=6"`
+}
diff --git a/backend/internal/dto/commerce.go b/backend/internal/dto/commerce.go
new file mode 100644
index 0000000..d35196f
--- /dev/null
+++ b/backend/internal/dto/commerce.go
@@ -0,0 +1,166 @@
+package dto
+
+// PlanCreate 创建定价计划请求 // Logan.Li
+type PlanCreate struct {
+	ProductID  uint     `json:"product_id" binding:"required"`
+	Name       string   `json:"name" binding:"required"`
+	PlanType   string   `json:"plan_type" binding:"required"` // perpetual / monthly / yearly / lifetime
+	Price      float64  `json:"price" binding:"required"`
+	Currency   string   `json:"currency"`
+	Duration   int      `json:"duration"`
+	MaxDevices int      `json:"max_devices"`
+	Features   []string `json:"features"`
+	SortOrder  int      `json:"sort_order"`
+	Status     *int     `json:"status"`
+}
+
+// PlanUpdate 更新定价计划请求 // Logan.Li
+type PlanUpdate struct {
+	Name       string   `json:"name"`
+	Price      *float64 `json:"price"`
+	Currency   string   `json:"currency"`
+	Duration   *int     `json:"duration"`
+	MaxDevices *int     `json:"max_devices"`
+	Features   []string `json:"features"`
+	SortOrder  *int     `json:"sort_order"`
+	Status     *int     `json:"status"`
+}
+
+// PlanResponse 定价计划响应 // Logan.Li
+type PlanResponse struct {
+	ID         uint     `json:"id"`
+	ProductID  uint     `json:"product_id"`
+	Name       string   `json:"name"`
+	PlanType   string   `json:"plan_type"`
+	Price      float64  `json:"price"`
+	Currency   string   `json:"currency"`
+	Duration   int      `json:"duration"`
+	MaxDevices int      `json:"max_devices"`
+	Features   []string `json:"features"`
+	SortOrder  int      `json:"sort_order"`
+	Status     int      `json:"status"`
+}
+
+// OrderResponse 订单响应 // Logan.Li
+type OrderResponse struct {
+	ID             uint    `json:"id"`
+	OrderNo        string  `json:"order_no"`
+	CustomerID     uint    `json:"customer_id"`
+	CustomerName   string  `json:"customer_name"`
+	ProductID      uint    `json:"product_id"`
+	ProductName    string  `json:"product_name"`
+	PlanID         uint    `json:"plan_id"`
+	PlanName       string  `json:"plan_name"`
+	LicenseID      uint    `json:"license_id"`
+	Amount         float64 `json:"amount"`
+	Currency       string  `json:"currency"`
+	Status         string  `json:"status"`
+	PaymentGateway string  `json:"payment_gateway"`
+	CreatedAt      string  `json:"created_at"`
+	PaidAt         string  `json:"paid_at,omitempty"`
+}
+
+// CreateOrderRequest 创建订单请求（客户端购买入口） // Logan.Li
+type CreateOrderRequest struct {
+	CustomerEmail string `json:"customer_email" binding:"required,email"`
+	CustomerName  string `json:"customer_name"`
+	ProductID     uint   `json:"product_id" binding:"required"`
+	PlanID        uint   `json:"plan_id" binding:"required"`
+	DeviceID      string `json:"device_id"`
+	ReturnURL     string `json:"return_url"`
+	CancelURL     string `json:"cancel_url"`
+}
+
+// CreateOrderResponse 创建订单响应 // Logan.Li
+type CreateOrderResponse struct {
+	OrderNo     string  `json:"order_no"`
+	CheckoutURL string  `json:"checkout_url"`
+	Amount      float64 `json:"amount"`
+	Currency    string  `json:"currency"`
+	Status      string  `json:"status"`
+	Gateway     string  `json:"gateway"`
+	ExpiresAt   string  `json:"expires_at"`
+}
+
+// PaymentWebhookRequest 支付回调请求 // Logan.Li
+type PaymentWebhookRequest struct {
+	EventType      string  `json:"event_type" binding:"required"`
+	OrderNo        string  `json:"order_no" binding:"required"`
+	GatewayOrderNo string  `json:"gateway_order_no"`
+	Status         string  `json:"status" binding:"required"` // paid / failed / refunded
+	Amount         float64 `json:"amount"`
+	Currency       string  `json:"currency"`
+	CustomerEmail  string  `json:"customer_email"`
+	Gateway        string  `json:"gateway" binding:"required"`
+	Signature      string  `json:"signature"`
+	Payload        string  `json:"payload"`
+}
+
+// ManualGrantRequest 手动发放 License 请求（管理后台） // Logan.Li
+type ManualGrantRequest struct {
+	CustomerEmail string `json:"customer_email" binding:"required,email"`
+	CustomerName  string `json:"customer_name"`
+	ProductID     uint   `json:"product_id" binding:"required"`
+	PlanID        uint   `json:"plan_id" binding:"required"`
+	DeviceID      string `json:"device_id"`
+	Notes         string `json:"notes"`
+}
+
+// EntitlementResponse 客户权益响应 // Logan.Li
+type EntitlementResponse struct {
+	ID             uint    `json:"id"`
+	CustomerID     uint    `json:"customer_id"`
+	CustomerName   string  `json:"customer_name"`
+	ProductID      uint    `json:"product_id"`
+	ProductName    string  `json:"product_name"`
+	PlanID         uint    `json:"plan_id"`
+	PlanName       string  `json:"plan_name"`
+	PlanType       string  `json:"plan_type"`
+	LicenseKey     string  `json:"license_key"`
+	Status         string  `json:"status"`
+	ValidFrom      string  `json:"valid_from"`
+	ValidUntil     *string `json:"valid_until,omitempty"`
+	DaysLeft       int     `json:"days_left"`
+	Renewable      bool    `json:"renewable"`
+	MaxDevices     int     `json:"max_devices"`
+	CurrentDevices int     `json:"current_devices"`
+}
+
+// DuplicatePurchaseCheckRequest 防重复购买检测请求 // Logan.Li
+type DuplicatePurchaseCheckRequest struct {
+	CustomerEmail string `json:"customer_email" binding:"required,email"`
+	ProductID     uint   `json:"product_id" binding:"required"`
+}
+
+// DuplicatePurchaseCheckResponse 防重复购买检测响应 // Logan.Li
+type DuplicatePurchaseCheckResponse struct {
+	AllowPurchase         bool          `json:"allow_purchase"`
+	Reason                string        `json:"reason,omitempty"`
+	ExistingEntitlementID uint          `json:"existing_entitlement_id,omitempty"`
+	ExistingLicenseKey    string        `json:"existing_license_key,omitempty"`
+	ExistingPlanType      string        `json:"existing_plan_type,omitempty"`
+	CanUpgrade            bool          `json:"can_upgrade"`
+	UpgradeOptions        []PlanResponse `json:"upgrade_options,omitempty"`
+}
+
+// CheckPurchaseStatusRequest 购买状态查询请求 // Logan.Li
+type CheckPurchaseStatusRequest struct {
+	CustomerEmail string `json:"customer_email" binding:"required,email"`
+	ProductID     uint   `json:"product_id" binding:"required"`
+}
+
+// CheckPurchaseStatusResponse 购买状态查询响应 // Logan.Li
+type CheckPurchaseStatusResponse struct {
+	Purchased        bool    `json:"purchased"`
+	HasActiveLicense bool    `json:"has_active_license"`
+	LicenseKey       string  `json:"license_key,omitempty"`
+	LicenseStatus    string  `json:"license_status,omitempty"`
+	PlanType         string  `json:"plan_type,omitempty"`
+	ValidUntil       *string `json:"valid_until,omitempty"`
+	DaysLeft         int     `json:"days_left,omitempty"`
+	Renewable        bool    `json:"renewable"`
+	MaxDevices       int     `json:"max_devices,omitempty"`
+	CurrentDevices   int     `json:"current_devices,omitempty"`
+	EntitlementID    uint    `json:"entitlement_id,omitempty"`
+	Message          string  `json:"message,omitempty"`
+}
diff --git a/backend/internal/dto/common.go b/backend/internal/dto/common.go
new file mode 100644
index 0000000..9808712
--- /dev/null
+++ b/backend/internal/dto/common.go
@@ -0,0 +1,19 @@
+package dto
+
+// Response 统一响应结构 // Logan.Li
+type Response struct {
+	Code    int         `json:"code"`
+	Message string      `json:"message"`
+	Data    interface{} `json:"data"`
+}
+
+// PaginatedResponse 分页响应结构 // Logan.Li
+type PaginatedResponse struct {
+	Count       int         `json:"count"`
+	TotalPages  int         `json:"total_pages"`
+	CurrentPage int         `json:"current_page"`
+	PageSize    int         `json:"page_size"`
+	Next        *string     `json:"next"`
+	Previous    *string     `json:"previous"`
+	Results     interface{} `json:"results"`
+}
diff --git a/backend/internal/dto/license.go b/backend/internal/dto/license.go
new file mode 100644
index 0000000..fe9bd5d
--- /dev/null
+++ b/backend/internal/dto/license.go
@@ -0,0 +1,103 @@
+package dto
+
+// LicenseCreate 创建 License 请求 // Logan.Li
+type LicenseCreate struct {
+	CustomerID     uint   `json:"customer_id" binding:"required"`
+	ProductID      uint   `json:"product_id" binding:"required"`
+	Duration       int    `json:"duration" binding:"required"` // 30/90/180/365/730/1095/1825/0(永久)
+	MaxActivations int    `json:"max_activations"`
+	IsTrial        bool   `json:"is_trial"`
+	TrialDays      int    `json:"trial_days"`
+	Notes          string `json:"notes"`
+	Count          int    `json:"count"` // 批量生成数量
+}
+
+// LicenseRenew 续期请求 // Logan.Li
+type LicenseRenew struct {
+	Duration int `json:"duration" binding:"required"`
+}
+
+// LicenseRevoke 吊销请求 // Logan.Li
+type LicenseRevoke struct {
+	Reason string `json:"reason"`
+}
+
+// LicenseResponse License 响应 // Logan.Li
+type LicenseResponse struct {
+	ID                 uint   `json:"id"`
+	LicenseKey         string `json:"license_key"`
+	CustomerID         uint   `json:"customer_id"`
+	CustomerName       string `json:"customer_name"`
+	ProductID          uint   `json:"product_id"`
+	ProductName        string `json:"product_name"`
+	Status             string `json:"status"`
+	StartDate          string `json:"start_date"`
+	EndDate            string `json:"end_date"`
+	Duration           int    `json:"duration"`
+	MaxActivations     int    `json:"max_activations"`
+	CurrentActivations int    `json:"current_activations"`
+	IsTrial            bool   `json:"is_trial"`
+	DaysLeft           int    `json:"days_left"`
+	Notes              string `json:"notes"`
+	CreatedAt          string `json:"created_at"`
+}
+
+// ============ 客户端授权契约（无需认证） ============
+
+// LicenseVerifyRequest 验证请求（客户端调用） // Logan.Li
+type LicenseVerifyRequest struct {
+	LicenseKey string `json:"license_key" binding:"required"`
+	DeviceID   string `json:"device_id"`
+	DeviceName string `json:"device_name"`
+	DeviceInfo string `json:"device_info"`
+	ProductID  uint   `json:"product_id"`
+}
+
+// LicenseVerifyResponse 验证响应 // Logan.Li
+type LicenseVerifyResponse struct {
+	Valid       bool     `json:"valid"`
+	LicenseKey  string   `json:"license_key,omitempty"`
+	ProductID   uint     `json:"product_id,omitempty"`
+	ProductName string   `json:"product_name,omitempty"`
+	ProductCode string   `json:"product_code,omitempty"`
+	Features    []string `json:"features,omitempty"`
+	Status      string   `json:"status,omitempty"`
+	ExpiresAt   string   `json:"expires_at,omitempty"`
+	DaysLeft    int      `json:"days_left,omitempty"`
+	MaxDevices  int      `json:"max_devices,omitempty"`
+	Message     string   `json:"message,omitempty"`
+}
+
+// LicenseActivateRequest 激活请求（客户端调用） // Logan.Li
+type LicenseActivateRequest struct {
+	LicenseKey string `json:"license_key" binding:"required"`
+	DeviceID   string `json:"device_id" binding:"required"`
+	DeviceName string `json:"device_name"`
+	DeviceInfo string `json:"device_info"`
+}
+
+// LicenseDeactivateRequest 停用请求（客户端调用） // Logan.Li
+type LicenseDeactivateRequest struct {
+	LicenseKey string `json:"license_key" binding:"required"`
+	DeviceID   string `json:"device_id" binding:"required"`
+}
+
+// LicenseHeartbeatRequest 心跳请求（客户端调用） // Logan.Li
+type LicenseHeartbeatRequest struct {
+	LicenseKey string `json:"license_key" binding:"required"`
+	DeviceID   string `json:"device_id" binding:"required"`
+}
+
+// ActivationResponse 激活记录响应 // Logan.Li
+type ActivationResponse struct {
+	ID          uint   `json:"id"`
+	LicenseID   uint   `json:"license_id"`
+	DeviceID    string `json:"device_id"`
+	DeviceName  string `json:"device_name"`
+	DeviceInfo  string `json:"device_info"`
+	IP          string `json:"ip"`
+	Status      string `json:"status"`
+	IsOnline    bool   `json:"is_online"`
+	ActivatedAt string `json:"activated_at"`
+	LastSeenAt  string `json:"last_seen_at"`
+}
diff --git a/backend/internal/dto/product.go b/backend/internal/dto/product.go
new file mode 100644
index 0000000..3f2ccd0
--- /dev/null
+++ b/backend/internal/dto/product.go
@@ -0,0 +1,75 @@
+package dto
+
+// ProductCreate 创建产品请求 // Logan.Li
+type ProductCreate struct {
+	Name        string   `json:"name" binding:"required"`
+	Code        string   `json:"code" binding:"required"`
+	Version     string   `json:"version"`
+	Description string   `json:"description"`
+	Features    []string `json:"features"`
+	Price       float64  `json:"price"`
+	PriceModel  string   `json:"price_model"`
+	Status      *int     `json:"status"`
+}
+
+// ProductUpdate 更新产品请求 // Logan.Li
+type ProductUpdate struct {
+	Name        string   `json:"name"`
+	Version     string   `json:"version"`
+	Description string   `json:"description"`
+	Features    []string `json:"features"`
+	Price       *float64 `json:"price"`
+	PriceModel  string   `json:"price_model"`
+	Status      *int     `json:"status"`
+}
+
+// ProductResponse 产品响应 // Logan.Li
+type ProductResponse struct {
+	ID          uint     `json:"id"`
+	Name        string   `json:"name"`
+	Code        string   `json:"code"`
+	Version     string   `json:"version"`
+	Description string   `json:"description"`
+	Features    []string `json:"features"`
+	Price       float64  `json:"price"`
+	PriceModel  string   `json:"price_model"`
+	Status      int      `json:"status"`
+	CreatedAt   string   `json:"created_at"`
+	UpdatedAt   string   `json:"updated_at"`
+}
+
+// CustomerCreate 创建客户请求 // Logan.Li
+type CustomerCreate struct {
+	Name    string `json:"name" binding:"required"`
+	Company string `json:"company"`
+	Email   string `json:"email" binding:"omitempty,email"`
+	Phone   string `json:"phone"`
+	Address string `json:"address"`
+	Notes   string `json:"notes"`
+	Status  *int   `json:"status"`
+}
+
+// CustomerUpdate 更新客户请求 // Logan.Li
+type CustomerUpdate struct {
+	Name    string `json:"name"`
+	Company string `json:"company"`
+	Email   string `json:"email" binding:"omitempty,email"`
+	Phone   string `json:"phone"`
+	Address string `json:"address"`
+	Notes   string `json:"notes"`
+	Status  *int   `json:"status"`
+}
+
+// CustomerResponse 客户响应 // Logan.Li
+type CustomerResponse struct {
+	ID        uint   `json:"id"`
+	Name      string `json:"name"`
+	Company   string `json:"company"`
+	Email     string `json:"email"`
+	Phone     string `json:"phone"`
+	Address   string `json:"address"`
+	Notes     string `json:"notes"`
+	Status    int    `json:"status"`
+	CreatedAt string `json:"created_at"`
+	UpdatedAt string `json:"updated_at"`
+}
diff --git a/backend/internal/model/audit.go b/backend/internal/model/audit.go
new file mode 100644
index 0000000..63d9f46
--- /dev/null
+++ b/backend/internal/model/audit.go
@@ -0,0 +1,42 @@
+package model
+
+import "time"
+
+// AuditLog 操作日志模型 // Logan.Li
+type AuditLog struct {
+	ID           uint      `json:"id" gorm:"primaryKey"`
+	UserID       uint      `json:"user_id"`
+	Username     string    `json:"username" gorm:"size:100"`
+	Action       string    `json:"action" gorm:"size:50;not null"` // create / update / delete / activate / renew / revoke ...
+	TargetType   string    `json:"target_type" gorm:"size:50"`     // license / customer / product / order ...
+	TargetID     uint      `json:"target_id"`
+	TargetName   string    `json:"target_name" gorm:"size:200"`
+	OldData      string    `json:"old_data" gorm:"type:text"` // JSON
+	NewData      string    `json:"new_data" gorm:"type:text"` // JSON
+	Detail       string    `json:"detail" gorm:"type:text"`
+	Result       string    `json:"result" gorm:"size:20"` // success / fail
+	ErrorMessage string    `json:"error_message" gorm:"type:text"`
+	IP           string    `json:"ip" gorm:"size:50"`
+	CreatedAt    time.Time `json:"created_at"`
+}
+
+// TableName 指定表名 // Logan.Li
+func (AuditLog) TableName() string {
+	return "audit_logs"
+}
+
+// LicenseTemplate License 模板（用于快速创建） // Logan.Li
+type LicenseTemplate struct {
+	ID             uint      `json:"id" gorm:"primaryKey"`
+	Name           string    `json:"name" gorm:"size:100;not null"`
+	Duration       int       `json:"duration" gorm:"default:365"` // 天数，0 表示永久
+	MaxActivations int       `json:"max_activations" gorm:"default:1"`
+	Description    string    `json:"description" gorm:"type:text"`
+	CreatedAt      time.Time `json:"created_at"`
+	UpdatedAt      time.Time `json:"updated_at"`
+}
+
+// TableName 指定表名 // Logan.Li
+func (LicenseTemplate) TableName() string {
+	return "license_templates"
+}
diff --git a/backend/internal/model/customer.go b/backend/internal/model/customer.go
new file mode 100644
index 0000000..800e36e
--- /dev/null
+++ b/backend/internal/model/customer.go
@@ -0,0 +1,28 @@
+package model
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// Customer 客户模型 // Logan.Li
+type Customer struct {
+	ID        uint           `json:"id" gorm:"primaryKey"`
+	Name      string         `json:"name" gorm:"size:100;not null"`
+	Company   string         `json:"company" gorm:"size:200"`
+	Email     string         `json:"email" gorm:"size:100;index"`
+	Phone     string         `json:"phone" gorm:"size:20"`
+	Address   string         `json:"address" gorm:"size:500"`
+	Notes     string         `json:"notes" gorm:"type:text"`
+	Status    int            `json:"status" gorm:"default:1"` // 1: 启用, 0: 禁用
+	Licenses  []License      `json:"licenses,omitempty" gorm:"foreignKey:CustomerID"`
+	CreatedAt time.Time      `json:"created_at"`
+	UpdatedAt time.Time      `json:"updated_at"`
+	DeletedAt gorm.DeletedAt `json:"deleted_at,omitempty" gorm:"index"`
+}
+
+// TableName 指定表名 // Logan.Li
+func (Customer) TableName() string {
+	return "customers"
+}
diff --git a/backend/internal/model/entitlement.go b/backend/internal/model/entitlement.go
new file mode 100644
index 0000000..c52effd
--- /dev/null
+++ b/backend/internal/model/entitlement.go
@@ -0,0 +1,28 @@
+package model
+
+import "time"
+
+// CustomerEntitlement 客户权益记录（防重复购买的核心表） // Logan.Li
+type CustomerEntitlement struct {
+	ID         uint       `json:"id" gorm:"primaryKey"`
+	CustomerID uint       `json:"customer_id"`
+	Customer   Customer   `json:"customer,omitempty" gorm:"foreignKey:CustomerID"`
+	ProductID  uint       `json:"product_id"`
+	Product    Product    `json:"product,omitempty" gorm:"foreignKey:ProductID"`
+	PlanID     uint       `json:"plan_id"`
+	Plan       Plan       `json:"plan,omitempty" gorm:"foreignKey:PlanID"`
+	LicenseID  uint       `json:"license_id"`
+	LicenseKey string     `json:"license_key" gorm:"size:100"`
+	PlanType   string     `json:"plan_type" gorm:"size:50"`                   // perpetual / monthly / yearly / lifetime
+	Status     string     `json:"status" gorm:"size:20;default:'active'"`     // active / expired / revoked
+	ValidFrom  time.Time  `json:"valid_from"`
+	ValidUntil *time.Time `json:"valid_until,omitempty"` // 买断/永久为 null
+	Renewable  bool       `json:"renewable" gorm:"default:true"` // 订阅到期后是否可续费
+	CreatedAt  time.Time  `json:"created_at"`
+	UpdatedAt  time.Time  `json:"updated_at"`
+}
+
+// TableName 指定表名 // Logan.Li
+func (CustomerEntitlement) TableName() string {
+	return "customer_entitlements"
+}
diff --git a/backend/internal/model/license.go b/backend/internal/model/license.go
new file mode 100644
index 0000000..5c25c79
--- /dev/null
+++ b/backend/internal/model/license.go
@@ -0,0 +1,83 @@
+package model
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// License 期限常量（天数，0 表示永久） // Logan.Li
+const (
+	Duration1Month  = 30
+	Duration3Months = 90
+	Duration6Months = 180
+	Duration1Year   = 365
+	Duration2Years  = 730
+	Duration3Years  = 1095
+	Duration5Years  = 1825
+	DurationForever = 0
+)
+
+// License 状态常量 // Logan.Li
+const (
+	LicenseStatusInactive  = "inactive"
+	LicenseStatusActive    = "active"
+	LicenseStatusExpired   = "expired"
+	LicenseStatusRevoked   = "revoked"
+	LicenseStatusSuspended = "suspended"
+)
+
+// PermanentEndDate 永久授权的到期时间（2099-12-31） // Logan.Li
+var PermanentEndDate = time.Date(2099, 12, 31, 23, 59, 59, 0, time.UTC)
+
+// License 许可证模型 // Logan.Li
+type License struct {
+	ID                 uint           `json:"id" gorm:"primaryKey"`
+	LicenseKey         string         `json:"license_key" gorm:"size:100;uniqueIndex;not null"`
+	CustomerID         uint           `json:"customer_id"`
+	Customer           Customer       `json:"customer,omitempty" gorm:"foreignKey:CustomerID"`
+	ProductID          uint           `json:"product_id"`
+	Product            Product        `json:"product,omitempty" gorm:"foreignKey:ProductID"`
+	Status             string         `json:"status" gorm:"size:20;default:'inactive'"`
+	StartDate          time.Time      `json:"start_date"`
+	EndDate            time.Time      `json:"end_date"`
+	Duration           int            `json:"duration" gorm:"default:365"` // 天数，0 表示永久
+	MaxActivations     int            `json:"max_activations" gorm:"default:1"`
+	CurrentActivations int            `json:"current_activations" gorm:"default:0"`
+	IsTrial            bool           `json:"is_trial" gorm:"default:false"`
+	TrialDays          int            `json:"trial_days" gorm:"default:0"`
+	RevokeReason       string         `json:"revoke_reason" gorm:"type:text"`
+	Notes              string         `json:"notes" gorm:"type:text"`
+	Activations        []Activation   `json:"activations,omitempty" gorm:"foreignKey:LicenseID"`
+	CreatedAt          time.Time      `json:"created_at"`
+	UpdatedAt          time.Time      `json:"updated_at"`
+	DeletedAt          gorm.DeletedAt `json:"deleted_at,omitempty" gorm:"index"`
+}
+
+// TableName 指定表名 // Logan.Li
+func (License) TableName() string {
+	return "licenses"
+}
+
+// Activation 激活记录模型（机器绑定） // Logan.Li
+type Activation struct {
+	ID          uint       `json:"id" gorm:"primaryKey"`
+	LicenseID   uint       `json:"license_id"`
+	License     License    `json:"license,omitempty" gorm:"foreignKey:LicenseID"`
+	DeviceID    string     `json:"device_id" gorm:"size:100"`
+	DeviceName  string     `json:"device_name" gorm:"size:200"`
+	DeviceInfo  string     `json:"device_info" gorm:"type:text"` // JSON 格式存储设备信息
+	IP          string     `json:"ip" gorm:"size:50"`
+	Status      string     `json:"status" gorm:"size:20;default:'active'"` // active / inactive
+	IsOnline    bool       `json:"is_online" gorm:"default:false"`
+	ActivatedAt time.Time  `json:"activated_at"`
+	ExpiresAt   *time.Time `json:"expires_at,omitempty"`
+	LastSeenAt  time.Time  `json:"last_seen_at"`
+	CreatedAt   time.Time  `json:"created_at"`
+	UpdatedAt   time.Time  `json:"updated_at"`
+}
+
+// TableName 指定表名 // Logan.Li
+func (Activation) TableName() string {
+	return "activations"
+}
diff --git a/backend/internal/model/order.go b/backend/internal/model/order.go
new file mode 100644
index 0000000..8dd9645
--- /dev/null
+++ b/backend/internal/model/order.go
@@ -0,0 +1,54 @@
+package model
+
+import "time"
+
+// Order 订单模型 // Logan.Li
+type Order struct {
+	ID             uint       `json:"id" gorm:"primaryKey"`
+	OrderNo        string     `json:"order_no" gorm:"size:100;uniqueIndex;not null"` // 系统唯一订单号（幂等键）
+	CustomerID     uint       `json:"customer_id"`
+	Customer       Customer   `json:"customer,omitempty" gorm:"foreignKey:CustomerID"`
+	ProductID      uint       `json:"product_id"`
+	Product        Product    `json:"product,omitempty" gorm:"foreignKey:ProductID"`
+	PlanID         uint       `json:"plan_id"`
+	Plan           Plan       `json:"plan,omitempty" gorm:"foreignKey:PlanID"`
+	LicenseID      uint       `json:"license_id"` // 关联的 License ID
+	Amount         float64    `json:"amount" gorm:"type:decimal(10,2);not null"`
+	Currency       string     `json:"currency" gorm:"size:3;default:'USD'"`
+	Status         string     `json:"status" gorm:"size:20;default:'pending'"` // pending / paid / failed / refunded / cancelled
+	PaymentMethod  string     `json:"payment_method" gorm:"size:50"`           // paddle / stripe / creem / waffo / alipay / wechat
+	PaymentGateway string     `json:"payment_gateway" gorm:"size:50"`
+	GatewayOrderNo string     `json:"gateway_order_no" gorm:"size:200"`
+	PaidAt         *time.Time `json:"paid_at,omitempty"`
+	RefundAt       *time.Time `json:"refund_at,omitempty"`
+	ClientIP       string     `json:"client_ip" gorm:"size:50"`
+	UserAgent      string     `json:"user_agent" gorm:"size:500"`
+	Notes          string     `json:"notes" gorm:"type:text"`
+	CreatedAt      time.Time  `json:"created_at"`
+	UpdatedAt      time.Time  `json:"updated_at"`
+}
+
+// TableName 指定表名 // Logan.Li
+func (Order) TableName() string {
+	return "orders"
+}
+
+// PaymentGatewayConfig 支付网关配置 // Logan.Li
+type PaymentGatewayConfig struct {
+	Gateway       string    `json:"gateway" gorm:"size:50;primaryKey"` // paddle / stripe / creem / waffo
+	Enabled       bool      `json:"enabled" gorm:"default:false"`
+	PublicKey     string    `json:"public_key" gorm:"type:text"`
+	SecretKey     string    `json:"secret_key" gorm:"type:text"`           // 加密存储
+	WebhookSecret string    `json:"webhook_secret" gorm:"type:text"`       // Webhook 验签密钥
+	SandboxMode   bool      `json:"sandbox_mode" gorm:"default:true"`
+	Currency      string    `json:"currency" gorm:"size:3;default:'USD'"`
+	Region        string    `json:"region" gorm:"size:50"`
+	Priority      int       `json:"priority" gorm:"default:0"`
+	CreatedAt     time.Time `json:"created_at"`
+	UpdatedAt     time.Time `json:"updated_at"`
+}
+
+// TableName 指定表名 // Logan.Li
+func (PaymentGatewayConfig) TableName() string {
+	return "payment_gateway_configs"
+}
diff --git a/backend/internal/model/plan.go b/backend/internal/model/plan.go
new file mode 100644
index 0000000..95c0493
--- /dev/null
+++ b/backend/internal/model/plan.go
@@ -0,0 +1,26 @@
+package model
+
+import "time"
+
+// Plan 定价计划模型（支持买断/订阅多档位） // Logan.Li
+type Plan struct {
+	ID         uint      `json:"id" gorm:"primaryKey"`
+	ProductID  uint      `json:"product_id"`
+	Product    Product   `json:"product,omitempty" gorm:"foreignKey:ProductID"`
+	Name       string    `json:"name" gorm:"size:100;not null"`                     // 如：个人版、专业版、企业版
+	PlanType   string    `json:"plan_type" gorm:"size:50;not null"`                 // perpetual / monthly / yearly / lifetime
+	Price      float64   `json:"price" gorm:"type:decimal(10,2);not null"`
+	Currency   string    `json:"currency" gorm:"size:3;default:'USD'"`              // USD / CNY
+	Duration   int       `json:"duration" gorm:"default:0"`                         // 天数：0=永久/买断，30=月，365=年
+	MaxDevices int       `json:"max_devices" gorm:"default:1"`                      // 允许激活设备数
+	Features   string    `json:"features" gorm:"type:text"`                         // JSON 功能清单
+	SortOrder  int       `json:"sort_order" gorm:"default:0"`
+	Status     int       `json:"status" gorm:"default:1"` // 1: 上架, 0: 下架
+	CreatedAt  time.Time `json:"created_at"`
+	UpdatedAt  time.Time `json:"updated_at"`
+}
+
+// TableName 指定表名 // Logan.Li
+func (Plan) TableName() string {
+	return "plans"
+}
diff --git a/backend/internal/model/product.go b/backend/internal/model/product.go
new file mode 100644
index 0000000..4b24f74
--- /dev/null
+++ b/backend/internal/model/product.go
@@ -0,0 +1,30 @@
+package model
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// Product 产品模型 // Logan.Li
+type Product struct {
+	ID          uint           `json:"id" gorm:"primaryKey"`
+	Name        string         `json:"name" gorm:"size:100;not null"`
+	Code        string         `json:"code" gorm:"size:50;uniqueIndex"`
+	Version     string         `json:"version" gorm:"size:50"`
+	Description string         `json:"description" gorm:"type:text"`
+	Features    string         `json:"features" gorm:"type:text"`     // JSON 格式存储功能列表
+	Price       float64        `json:"price" gorm:"type:decimal(10,2)"`
+	PriceModel  string         `json:"price_model" gorm:"size:50;default:'subscription'"` // subscription / perpetual / trial
+	Status      int            `json:"status" gorm:"default:1"`                           // 1: 上架, 0: 下架
+	Licenses    []License      `json:"licenses,omitempty" gorm:"foreignKey:ProductID"`
+	Plans       []Plan         `json:"plans,omitempty" gorm:"foreignKey:ProductID"`
+	CreatedAt   time.Time      `json:"created_at"`
+	UpdatedAt   time.Time      `json:"updated_at"`
+	DeletedAt   gorm.DeletedAt `json:"deleted_at,omitempty" gorm:"index"`
+}
+
+// TableName 指定表名 // Logan.Li
+func (Product) TableName() string {
+	return "products"
+}
diff --git a/backend/internal/model/setting.go b/backend/internal/model/setting.go
new file mode 100644
index 0000000..f45e16f
--- /dev/null
+++ b/backend/internal/model/setting.go
@@ -0,0 +1,27 @@
+package model
+
+import "time"
+
+// Setting 系统设置模型（单行配置，后续阶段启用） // Logan.Li
+type Setting struct {
+	ID                    uint      `json:"id" gorm:"primaryKey"`
+	SystemName            string    `json:"system_name" gorm:"size:100;default:'opsx-licence'"`
+	SystemLogo            string    `json:"system_logo" gorm:"size:500"`
+	DefaultDuration       int       `json:"default_duration" gorm:"default:365"`       // 默认 License 有效天数
+	DefaultMaxActivations int       `json:"default_max_activations" gorm:"default:1"`  // 默认最大激活数
+	ExpireReminderDays    int       `json:"expire_reminder_days" gorm:"default:7"`     // 到期提醒天数
+	SMTPServer            string    `json:"smtp_server" gorm:"size:200"`
+	SMTPPort              int       `json:"smtp_port"`
+	SMTPUsername          string    `json:"smtp_username" gorm:"size:100"`
+	SMTPPassword          string    `json:"smtp_password" gorm:"size:100"`
+	SenderEmail           string    `json:"sender_email" gorm:"size:100"`
+	SenderName            string    `json:"sender_name" gorm:"size:100"`
+	APIRateLimit          int       `json:"api_rate_limit" gorm:"default:1000"`
+	LogRetentionDays      int       `json:"log_retention_days" gorm:"default:365"`
+	UpdatedAt             time.Time `json:"updated_at"`
+}
+
+// TableName 指定表名 // Logan.Li
+func (Setting) TableName() string {
+	return "settings"
+}
diff --git a/backend/internal/model/user.go b/backend/internal/model/user.go
new file mode 100644
index 0000000..bbaac08
--- /dev/null
+++ b/backend/internal/model/user.go
@@ -0,0 +1,27 @@
+package model
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// User 管理员用户模型（单 Admin 表，无 RBAC 多角色） // Logan.Li
+type User struct {
+	ID        uint           `json:"id" gorm:"primaryKey"`
+	Username  string         `json:"username" gorm:"size:100;uniqueIndex;not null"`
+	Password  string         `json:"-" gorm:"size:255;not null"` // bcrypt 哈希，JSON 响应时隐藏
+	Email     string         `json:"email" gorm:"size:100"`
+	Avatar    string         `json:"avatar" gorm:"size:500"`
+	Role      string         `json:"role" gorm:"size:20;default:'admin'"` // 固定 admin，预留扩展
+	IsActive  bool           `json:"is_active" gorm:"default:true"`
+	LastLogin *time.Time     `json:"last_login,omitempty"`
+	CreatedAt time.Time      `json:"created_at"`
+	UpdatedAt time.Time      `json:"updated_at"`
+	DeletedAt gorm.DeletedAt `json:"deleted_at,omitempty" gorm:"index"`
+}
+
+// TableName 指定表名 // Logan.Li
+func (User) TableName() string {
+	return "users"
+}
diff --git a/backend/internal/service/analytics/analytics_service.go b/backend/internal/service/analytics/analytics_service.go
new file mode 100644
index 0000000..17710bb
--- /dev/null
+++ b/backend/internal/service/analytics/analytics_service.go
@@ -0,0 +1,167 @@
+package analytics
+
+import (
+	"backend/internal/dto"
+	"backend/internal/model"
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// AnalyticsService 数据分析业务逻辑层 // Logan.Li
+type AnalyticsService struct {
+	db *gorm.DB
+}
+
+// NewAnalyticsService 创建 service 实例 // Logan.Li
+func NewAnalyticsService(db *gorm.DB) *AnalyticsService {
+	return &AnalyticsService{db: db}
+}
+
+// GetDashboardStats 仪表板统计 // Logan.Li
+func (s *AnalyticsService) GetDashboardStats() (*dto.DashboardStats, error) {
+	var stats dto.DashboardStats
+
+	s.db.Model(&model.License{}).Count(&stats.TotalLicenses)
+	s.db.Model(&model.License{}).Where("status = ?", model.LicenseStatusActive).Count(&stats.ActiveLicenses)
+
+	// 本月新增 // Logan.Li
+	now := time.Now()
+	monthStart := time.Date(now.Year(), now.Month(), 1, 0, 0, 0, 0, now.Location())
+	s.db.Model(&model.License{}).Where("created_at >= ?", monthStart).Count(&stats.NewThisMonth)
+
+	// 即将到期（30 天内） // Logan.Li
+	thirtyDaysLater := now.AddDate(0, 0, 30)
+	s.db.Model(&model.License{}).
+		Where("status = ? AND end_date > ? AND end_date < ?", model.LicenseStatusActive, now, thirtyDaysLater).
+		Count(&stats.ExpiringSoon)
+
+	s.db.Model(&model.Customer{}).Count(&stats.TotalCustomers)
+	s.db.Model(&model.Product{}).Count(&stats.TotalProducts)
+
+	// 在线设备（5 分钟内有心跳） // Logan.Li
+	fiveMinAgo := now.Add(-5 * time.Minute)
+	s.db.Model(&model.Activation{}).Where("is_online = ? AND last_seen_at >= ?", true, fiveMinAgo).Count(&stats.OnlineDevices)
+
+	// 本月收入 // Logan.Li
+	s.db.Model(&model.Order{}).
+		Where("status = ? AND paid_at >= ?", "paid", monthStart).
+		Select("COALESCE(SUM(amount), 0)").
+		Scan(&stats.MonthlyRevenue)
+
+	return &stats, nil
+}
+
+// GetExpiringLicenses 即将到期 License 列表 // Logan.Li
+func (s *AnalyticsService) GetExpiringLicenses(days int) ([]dto.ExpiringLicenseItem, error) {
+	if days <= 0 {
+		days = 30
+	}
+	now := time.Now()
+	deadline := now.AddDate(0, 0, days)
+
+	var licenses []model.License
+	s.db.Preload("Customer").Preload("Product").
+		Where("status = ? AND end_date > ? AND end_date < ?", model.LicenseStatusActive, now, deadline).
+		Order("end_date ASC").Limit(20).Find(&licenses)
+
+	results := make([]dto.ExpiringLicenseItem, 0, len(licenses))
+	for _, l := range licenses {
+		results = append(results, dto.ExpiringLicenseItem{
+			ID:           l.ID,
+			LicenseKey:   l.LicenseKey,
+			CustomerName: l.Customer.Name,
+			ProductName:  l.Product.Name,
+			EndDate:      l.EndDate.Format("2006-01-02"),
+			DaysLeft:     int(l.EndDate.Sub(now).Hours() / 24),
+		})
+	}
+	return results, nil
+}
+
+// GetRecentActivities 最近操作活动 // Logan.Li
+func (s *AnalyticsService) GetRecentActivities(limit int) ([]dto.RecentActivityItem, error) {
+	if limit <= 0 {
+		limit = 10
+	}
+	var logs []model.AuditLog
+	s.db.Order("created_at DESC").Limit(limit).Find(&logs)
+
+	results := make([]dto.RecentActivityItem, 0, len(logs))
+	for _, l := range logs {
+		results = append(results, dto.RecentActivityItem{
+			ID:         l.ID,
+			Username:   l.Username,
+			Action:     l.Action,
+			TargetType: l.TargetType,
+			TargetName: l.TargetName,
+			Detail:     l.Detail,
+			CreatedAt:  l.CreatedAt.Format("2006-01-02 15:04:05"),
+		})
+	}
+	return results, nil
+}
+
+// GetOnlineStats 在线统计 // Logan.Li
+func (s *AnalyticsService) GetOnlineStats() (map[string]interface{}, error) {
+	now := time.Now()
+	fiveMinAgo := now.Add(-5 * time.Minute)
+
+	var onlineDevices int64
+	var totalActivations int64
+	s.db.Model(&model.Activation{}).Where("is_online = ? AND last_seen_at >= ?", true, fiveMinAgo).Count(&onlineDevices)
+	s.db.Model(&model.Activation{}).Where("status = ?", "active").Count(&totalActivations)
+
+	return map[string]interface{}{
+		"online_devices":      onlineDevices,
+		"total_activations":   totalActivations,
+		"offline_devices":     totalActivations - onlineDevices,
+	}, nil
+}
+
+// GetRevenueStats 收入统计（近 6 个月） // Logan.Li
+func (s *AnalyticsService) GetRevenueStats() ([]dto.RevenuePoint, error) {
+	now := time.Now()
+	results := make([]dto.RevenuePoint, 0, 6)
+	for i := 5; i >= 0; i-- {
+		monthStart := time.Date(now.Year(), now.Month()-time.Month(i), 1, 0, 0, 0, 0, now.Location())
+		nextMonth := monthStart.AddDate(0, 1, 0)
+		var amount float64
+		s.db.Model(&model.Order{}).
+			Where("status = ? AND created_at >= ? AND created_at < ?", "paid", monthStart, nextMonth).
+			Select("COALESCE(SUM(amount), 0)").
+			Scan(&amount)
+		results = append(results, dto.RevenuePoint{
+			Period: monthStart.Format("2006-01"),
+			Amount: amount,
+		})
+	}
+	return results, nil
+}
+
+// GetLicenseGrowth License 增长趋势（近 6 个月） // Logan.Li
+func (s *AnalyticsService) GetLicenseGrowth() ([]dto.LicenseGrowthPoint, error) {
+	now := time.Now()
+	results := make([]dto.LicenseGrowthPoint, 0, 6)
+	for i := 5; i >= 0; i-- {
+		monthEnd := time.Date(now.Year(), now.Month()-time.Month(i)+1, 0, 23, 59, 59, 0, now.Location())
+		var count int64
+		s.db.Model(&model.License{}).Where("created_at <= ?", monthEnd).Count(&count)
+		results = append(results, dto.LicenseGrowthPoint{
+			Date:  monthEnd.Format("2006-01"),
+			Count: count,
+		})
+	}
+	return results, nil
+}
+
+// GetProductDistribution 产品分布 // Logan.Li
+func (s *AnalyticsService) GetProductDistribution() ([]dto.ProductDistribution, error) {
+	var results []dto.ProductDistribution
+	s.db.Model(&model.License{}).
+		Select("products.name as product_name, count(licenses.id) as count").
+		Joins("LEFT JOIN products ON products.id = licenses.product_id").
+		Group("licenses.product_id").
+		Scan(&results)
+	return results, nil
+}
diff --git a/backend/internal/service/auth/auth_service.go b/backend/internal/service/auth/auth_service.go
new file mode 100644
index 0000000..1ffdfeb
--- /dev/null
+++ b/backend/internal/service/auth/auth_service.go
@@ -0,0 +1,91 @@
+package auth
+
+import (
+	"backend/config"
+	"backend/internal/dto"
+	"backend/internal/model"
+	"backend/utils"
+	"errors"
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// AuthService 认证业务逻辑层 // Logan.Li
+type AuthService struct {
+	db  *gorm.DB
+	cfg *config.Config
+}
+
+// NewAuthService 创建 service 实例 // Logan.Li
+func NewAuthService(db *gorm.DB, cfg *config.Config) *AuthService {
+	return &AuthService{db: db, cfg: cfg}
+}
+
+// Login 校验账号密码并签发 JWT // Logan.Li
+func (s *AuthService) Login(req dto.LoginRequest) (*dto.LoginResponse, error) {
+	var user model.User
+	if err := s.db.Where("username = ?", req.Username).First(&user).Error; err != nil {
+		return nil, errors.New("用户名或密码错误")
+	}
+
+	if !user.IsActive {
+		return nil, errors.New("账号已被禁用")
+	}
+
+	if !utils.CheckPassword(req.Password, user.Password) {
+		return nil, errors.New("用户名或密码错误")
+	}
+
+	// 更新最后登录时间 // Logan.Li
+	now := time.Now()
+	s.db.Model(&user).Update("last_login", now)
+
+	// 签发 JWT // Logan.Li
+	token, err := utils.GenerateToken(user.ID, user.Username, user.Role, s.cfg.JWTSecret)
+	if err != nil {
+		return nil, errors.New("令牌生成失败")
+	}
+
+	return &dto.LoginResponse{
+		Token: token,
+		UserInfo: dto.UserInfoResponse{
+			ID:       user.ID,
+			Username: user.Username,
+			Email:    user.Email,
+			Avatar:   user.Avatar,
+			Role:     user.Role,
+		},
+	}, nil
+}
+
+// GetCurrentUser 根据 ID 获取当前用户信息 // Logan.Li
+func (s *AuthService) GetCurrentUser(userID uint) (*dto.UserInfoResponse, error) {
+	var user model.User
+	if err := s.db.First(&user, userID).Error; err != nil {
+		return nil, errors.New("用户不存在")
+	}
+
+	return &dto.UserInfoResponse{
+		ID:       user.ID,
+		Username: user.Username,
+		Email:    user.Email,
+		Avatar:   user.Avatar,
+		Role:     user.Role,
+	}, nil
+}
+
+// ChangePassword 修改当前用户密码 // Logan.Li
+func (s *AuthService) ChangePassword(userID uint, req dto.ChangePasswordRequest) error {
+	var user model.User
+	if err := s.db.First(&user, userID).Error; err != nil {
+		return errors.New("用户不存在")
+	}
+
+	if !utils.CheckPassword(req.OldPassword, user.Password) {
+		return errors.New("原密码错误")
+	}
+
+	user.Password = utils.HashPassword(req.NewPassword)
+	return s.db.Save(&user).Error
+}
diff --git a/backend/internal/service/customer/customer_service.go b/backend/internal/service/customer/customer_service.go
new file mode 100644
index 0000000..1813ac5
--- /dev/null
+++ b/backend/internal/service/customer/customer_service.go
@@ -0,0 +1,146 @@
+package customer
+
+import (
+	"backend/internal/dto"
+	"backend/internal/model"
+	"errors"
+
+	"gorm.io/gorm"
+)
+
+// CustomerService 客户业务逻辑层 // Logan.Li
+type CustomerService struct {
+	db *gorm.DB
+}
+
+// NewCustomerService 创建 service 实例 // Logan.Li
+func NewCustomerService(db *gorm.DB) *CustomerService {
+	return &CustomerService{db: db}
+}
+
+// List 分页查询客户 // Logan.Li
+func (s *CustomerService) List(page, pageSize int, keyword string) ([]dto.CustomerResponse, int64, error) {
+	var customers []model.Customer
+	var total int64
+
+	query := s.db.Model(&model.Customer{})
+	if keyword != "" {
+		query = query.Where("name LIKE ? OR email LIKE ? OR company LIKE ?", "%"+keyword+"%", "%"+keyword+"%", "%"+keyword+"%")
+	}
+
+	query.Count(&total)
+	if err := query.Order("created_at DESC").
+		Offset((page - 1) * pageSize).Limit(pageSize).
+		Find(&customers).Error; err != nil {
+		return nil, 0, err
+	}
+
+	results := make([]dto.CustomerResponse, 0, len(customers))
+	for _, c := range customers {
+		results = append(results, toCustomerResponse(c))
+	}
+	return results, total, nil
+}
+
+// GetAll 获取全部客户（下拉选项用） // Logan.Li
+func (s *CustomerService) GetAll() ([]dto.CustomerResponse, error) {
+	var customers []model.Customer
+	if err := s.db.Where("status = ?", 1).Order("created_at DESC").Find(&customers).Error; err != nil {
+		return nil, err
+	}
+	results := make([]dto.CustomerResponse, 0, len(customers))
+	for _, c := range customers {
+		results = append(results, toCustomerResponse(c))
+	}
+	return results, nil
+}
+
+// GetByID 根据 ID 获取客户 // Logan.Li
+func (s *CustomerService) GetByID(id uint) (*dto.CustomerResponse, error) {
+	var customer model.Customer
+	if err := s.db.First(&customer, id).Error; err != nil {
+		return nil, errors.New("客户不存在")
+	}
+	resp := toCustomerResponse(customer)
+	return &resp, nil
+}
+
+// Create 创建客户 // Logan.Li
+func (s *CustomerService) Create(req dto.CustomerCreate) (*dto.CustomerResponse, error) {
+	status := 1
+	if req.Status != nil {
+		status = *req.Status
+	}
+	customer := model.Customer{
+		Name:    req.Name,
+		Company: req.Company,
+		Email:   req.Email,
+		Phone:   req.Phone,
+		Address: req.Address,
+		Notes:   req.Notes,
+		Status:  status,
+	}
+	if err := s.db.Create(&customer).Error; err != nil {
+		return nil, errors.New("创建客户失败")
+	}
+	resp := toCustomerResponse(customer)
+	return &resp, nil
+}
+
+// Update 更新客户 // Logan.Li
+func (s *CustomerService) Update(id uint, req dto.CustomerUpdate) (*dto.CustomerResponse, error) {
+	var customer model.Customer
+	if err := s.db.First(&customer, id).Error; err != nil {
+		return nil, errors.New("客户不存在")
+	}
+
+	updates := map[string]interface{}{
+		"name":    req.Name,
+		"company": req.Company,
+		"email":   req.Email,
+		"phone":   req.Phone,
+		"address": req.Address,
+		"notes":   req.Notes,
+	}
+	if req.Status != nil {
+		updates["status"] = *req.Status
+	}
+
+	if err := s.db.Model(&customer).Updates(updates).Error; err != nil {
+		return nil, errors.New("更新客户失败")
+	}
+	s.db.First(&customer, id)
+	resp := toCustomerResponse(customer)
+	return &resp, nil
+}
+
+// Delete 删除客户（软删除） // Logan.Li
+func (s *CustomerService) Delete(id uint) error {
+	var count int64
+	s.db.Model(&model.License{}).Where("customer_id = ?", id).Count(&count)
+	if count > 0 {
+		return errors.New("该客户下存在 License，无法删除")
+	}
+	return s.db.Delete(&model.Customer{}, id).Error
+}
+
+// UpdateStatus 切换客户状态 // Logan.Li
+func (s *CustomerService) UpdateStatus(id uint, status int) error {
+	return s.db.Model(&model.Customer{}).Where("id = ?", id).Update("status", status).Error
+}
+
+// toCustomerResponse 模型转响应 DTO // Logan.Li
+func toCustomerResponse(c model.Customer) dto.CustomerResponse {
+	return dto.CustomerResponse{
+		ID:        c.ID,
+		Name:      c.Name,
+		Company:   c.Company,
+		Email:     c.Email,
+		Phone:     c.Phone,
+		Address:   c.Address,
+		Notes:     c.Notes,
+		Status:    c.Status,
+		CreatedAt: c.CreatedAt.Format("2006-01-02 15:04:05"),
+		UpdatedAt: c.UpdatedAt.Format("2006-01-02 15:04:05"),
+	}
+}
diff --git a/backend/internal/service/entitlement/entitlement_service.go b/backend/internal/service/entitlement/entitlement_service.go
new file mode 100644
index 0000000..0245717
--- /dev/null
+++ b/backend/internal/service/entitlement/entitlement_service.go
@@ -0,0 +1,195 @@
+package entitlement
+
+import (
+	"backend/internal/dto"
+	"backend/internal/model"
+	"backend/utils"
+	"errors"
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// EntitlementService 客户权益业务逻辑层 // Logan.Li
+type EntitlementService struct {
+	db *gorm.DB
+}
+
+// NewEntitlementService 创建 service 实例 // Logan.Li
+func NewEntitlementService(db *gorm.DB) *EntitlementService {
+	return &EntitlementService{db: db}
+}
+
+// List 分页/筛选查询权益 // Logan.Li
+func (s *EntitlementService) List(page, pageSize int, customerID, productID uint) ([]dto.EntitlementResponse, int64, error) {
+	var entitlements []model.CustomerEntitlement
+	var total int64
+
+	query := s.db.Model(&model.CustomerEntitlement{}).Preload("Customer").Preload("Product").Preload("Plan")
+	if customerID > 0 {
+		query = query.Where("customer_id = ?", customerID)
+	}
+	if productID > 0 {
+		query = query.Where("product_id = ?", productID)
+	}
+
+	query.Count(&total)
+	if err := query.Order("created_at DESC").
+		Offset((page - 1) * pageSize).Limit(pageSize).
+		Find(&entitlements).Error; err != nil {
+		return nil, 0, err
+	}
+
+	results := make([]dto.EntitlementResponse, 0, len(entitlements))
+	for _, e := range entitlements {
+		results = append(results, s.toResponse(e))
+	}
+	return results, total, nil
+}
+
+// GetByID 获取权益详情 // Logan.Li
+func (s *EntitlementService) GetByID(id uint) (*dto.EntitlementResponse, error) {
+	var ent model.CustomerEntitlement
+	if err := s.db.Preload("Customer").Preload("Product").Preload("Plan").First(&ent, id).Error; err != nil {
+		return nil, errors.New("权益记录不存在")
+	}
+	resp := s.toResponse(ent)
+	return &resp, nil
+}
+
+// Revoke 吊销权益 // Logan.Li
+func (s *EntitlementService) Revoke(id uint) error {
+	var ent model.CustomerEntitlement
+	if err := s.db.First(&ent, id).Error; err != nil {
+		return errors.New("权益记录不存在")
+	}
+	return s.db.Transaction(func(tx *gorm.DB) error {
+		ent.Status = "revoked"
+		if err := tx.Save(&ent).Error; err != nil {
+			return err
+		}
+		// 同步吊销关联 License // Logan.Li
+		if ent.LicenseID > 0 {
+			tx.Model(&model.License{}).Where("id = ?", ent.LicenseID).
+				Updates(map[string]interface{}{"status": model.LicenseStatusRevoked, "revoke_reason": "权益被吊销"})
+		}
+		return nil
+	})
+}
+
+// Renew 续费订阅（按计划延长有效期） // Logan.Li
+func (s *EntitlementService) Renew(id, planID uint) (*dto.EntitlementResponse, error) {
+	var ent model.CustomerEntitlement
+	if err := s.db.First(&ent, id).Error; err != nil {
+		return nil, errors.New("权益记录不存在")
+	}
+	var plan model.Plan
+	if err := s.db.First(&plan, planID).Error; err != nil {
+		return nil, errors.New("定价计划不存在")
+	}
+
+	now := time.Now()
+	var validUntil *time.Time
+	if plan.Duration == 0 {
+		validUntil = nil // 永久
+	} else {
+		var base time.Time
+		if ent.ValidUntil != nil && ent.ValidUntil.After(now) {
+			base = *ent.ValidUntil
+		} else {
+			base = now
+		}
+		end := base.AddDate(0, 0, plan.Duration)
+		validUntil = &end
+	}
+
+	ent.Status = "active"
+	ent.ValidFrom = now
+	ent.ValidUntil = validUntil
+	ent.PlanID = planID
+	ent.PlanType = plan.PlanType
+	if err := s.db.Save(&ent).Error; err != nil {
+		return nil, errors.New("续费失败")
+	}
+
+	// 同步延长关联 License 有效期 // Logan.Li
+	if ent.LicenseID > 0 {
+		var lic model.License
+		s.db.First(&lic, ent.LicenseID)
+		if plan.Duration == 0 {
+			lic.EndDate = model.PermanentEndDate
+		} else {
+			base := lic.EndDate
+			if utils.IsLicenseExpired(lic.EndDate) {
+				base = now
+			}
+			lic.EndDate = base.AddDate(0, 0, plan.Duration)
+		}
+		lic.Status = model.LicenseStatusActive
+		s.db.Save(&lic)
+	}
+
+	s.db.Preload("Customer").Preload("Product").Preload("Plan").First(&ent, id)
+	resp := s.toResponse(ent)
+	return &resp, nil
+}
+
+// GetByEmail 按邮箱查询客户权益（客户端接口） // Logan.Li
+func (s *EntitlementService) GetByEmail(email string) ([]dto.EntitlementResponse, error) {
+	var customer model.Customer
+	if err := s.db.Where("email = ?", email).First(&customer).Error; err != nil {
+		return []dto.EntitlementResponse{}, nil
+	}
+
+	var entitlements []model.CustomerEntitlement
+	s.db.Where("customer_id = ?", customer.ID).
+		Preload("Product").Preload("Plan").
+		Find(&entitlements)
+
+	results := make([]dto.EntitlementResponse, 0, len(entitlements))
+	for _, e := range entitlements {
+		results = append(results, s.toResponse(e))
+	}
+	return results, nil
+}
+
+// toResponse 模型转响应 DTO // Logan.Li
+func (s *EntitlementService) toResponse(e model.CustomerEntitlement) dto.EntitlementResponse {
+	resp := dto.EntitlementResponse{
+		ID:         e.ID,
+		CustomerID: e.CustomerID,
+		ProductID:  e.ProductID,
+		PlanID:     e.PlanID,
+		PlanType:   e.PlanType,
+		LicenseKey: e.LicenseKey,
+		Status:     e.Status,
+		ValidFrom:  e.ValidFrom.Format("2006-01-02 15:04:05"),
+		Renewable:  e.Renewable,
+	}
+	if e.Customer.ID > 0 {
+		resp.CustomerName = e.Customer.Name
+	}
+	if e.Product.ID > 0 {
+		resp.ProductName = e.Product.Name
+	}
+	if e.Plan.ID > 0 {
+		resp.PlanName = e.Plan.Name
+	}
+	if e.ValidUntil != nil {
+		s := e.ValidUntil.Format("2006-01-02 15:04:05")
+		resp.ValidUntil = &s
+		resp.DaysLeft = utils.CalculateDaysLeft(*e.ValidUntil)
+	} else {
+		resp.DaysLeft = 9999 // 永久
+	}
+	// 查设备数 // Logan.Li
+	if e.LicenseID > 0 {
+		var lic model.License
+		s.db.First(&lic, e.LicenseID)
+		resp.MaxDevices = lic.MaxActivations
+		var count int64
+		s.db.Model(&model.Activation{}).Where("license_id = ?", e.LicenseID).Count(&count)
+		resp.CurrentDevices = int(count)
+	}
+	return resp
+}
diff --git a/backend/internal/service/license/client_service.go b/backend/internal/service/license/client_service.go
new file mode 100644
index 0000000..8c8cd72
--- /dev/null
+++ b/backend/internal/service/license/client_service.go
@@ -0,0 +1,158 @@
+package license
+
+import (
+	"backend/internal/dto"
+	"backend/internal/model"
+	"backend/utils"
+	"errors"
+	"time"
+)
+
+// Verify 客户端 License 验证 // Logan.Li
+func (s *LicenseService) Verify(req dto.LicenseVerifyRequest) (*dto.LicenseVerifyResponse, error) {
+	var lic model.License
+	if err := s.db.Preload("Product").Where("license_key = ?", req.LicenseKey).First(&lic).Error; err != nil {
+		return &dto.LicenseVerifyResponse{Valid: false, Message: "无效的 License"}, nil
+	}
+
+	// 校验产品归属 // Logan.Li
+	if req.ProductID > 0 && lic.ProductID != req.ProductID {
+		return &dto.LicenseVerifyResponse{Valid: false, Message: "License 与产品不匹配"}, nil
+	}
+
+	// 状态检查 // Logan.Li
+	switch lic.Status {
+	case model.LicenseStatusRevoked:
+		return &dto.LicenseVerifyResponse{Valid: false, Message: "License 已被吊销"}, nil
+	case model.LicenseStatusSuspended:
+		return &dto.LicenseVerifyResponse{Valid: false, Message: "License 已被暂停"}, nil
+	case model.LicenseStatusExpired:
+		return &dto.LicenseVerifyResponse{Valid: false, Message: "License 已过期"}, nil
+	}
+
+	// 过期检查（惰性更新状态） // Logan.Li
+	if utils.IsLicenseExpired(lic.EndDate) {
+		lic.Status = model.LicenseStatusExpired
+		s.db.Save(&lic)
+		return &dto.LicenseVerifyResponse{Valid: false, Message: "License 已过期"}, nil
+	}
+
+	return &dto.LicenseVerifyResponse{
+		Valid:       true,
+		LicenseKey:  lic.LicenseKey,
+		ProductID:   lic.ProductID,
+		ProductName: lic.Product.Name,
+		ProductCode: lic.Product.Code,
+		Features:    utils.ParseFeatures(lic.Product.Features),
+		Status:      lic.Status,
+		ExpiresAt:   lic.EndDate.Format("2006-01-02 15:04:05"),
+		DaysLeft:    utils.CalculateDaysLeft(lic.EndDate),
+		MaxDevices:  lic.MaxActivations,
+		Message:     "验证成功",
+	}, nil
+}
+
+// Activate 客户端激活 License（机器绑定） // Logan.Li
+func (s *LicenseService) Activate(req dto.LicenseActivateRequest, clientIP string) (map[string]interface{}, error) {
+	var lic model.License
+	if err := s.db.Where("license_key = ?", req.LicenseKey).First(&lic).Error; err != nil {
+		return nil, errors.New("无效的 License")
+	}
+
+	if lic.Status == model.LicenseStatusRevoked {
+		return nil, errors.New("License 已被吊销")
+	}
+	if lic.Status == model.LicenseStatusExpired || utils.IsLicenseExpired(lic.EndDate) {
+		return nil, errors.New("License 已过期")
+	}
+
+	// 同设备重复激活视为重新激活，不消耗额度 // Logan.Li
+	var existing model.Activation
+	if err := s.db.Where("license_id = ? AND device_id = ?", lic.ID, req.DeviceID).First(&existing).Error; err == nil {
+		existing.LastSeenAt = time.Now()
+		existing.IsOnline = true
+		existing.DeviceName = req.DeviceName
+		existing.DeviceInfo = req.DeviceInfo
+		existing.IP = clientIP
+		s.db.Save(&existing)
+		return map[string]interface{}{
+			"expires_at": lic.EndDate.Format("2006-01-02 15:04:05"),
+			"days_left":  utils.CalculateDaysLeft(lic.EndDate),
+		}, nil
+	}
+
+	// 检查激活额度 // Logan.Li
+	if lic.CurrentActivations >= lic.MaxActivations {
+		return nil, errors.New("已达到最大激活数量限制")
+	}
+
+	// 创建激活记录 // Logan.Li
+	activation := model.Activation{
+		LicenseID:   lic.ID,
+		DeviceID:    req.DeviceID,
+		DeviceName:  req.DeviceName,
+		DeviceInfo:  req.DeviceInfo,
+		IP:          clientIP,
+		Status:      "active",
+		IsOnline:    true,
+		ActivatedAt: time.Now(),
+		LastSeenAt:  time.Now(),
+	}
+	if err := s.db.Create(&activation).Error; err != nil {
+		return nil, errors.New("激活失败")
+	}
+
+	lic.CurrentActivations++
+	if lic.Status == model.LicenseStatusInactive {
+		lic.Status = model.LicenseStatusActive
+	}
+	s.db.Save(&lic)
+
+	return map[string]interface{}{
+		"expires_at": lic.EndDate.Format("2006-01-02 15:04:05"),
+		"days_left":  utils.CalculateDaysLeft(lic.EndDate),
+	}, nil
+}
+
+// Deactivate 客户端停用 // Logan.Li
+func (s *LicenseService) Deactivate(req dto.LicenseDeactivateRequest) error {
+	var lic model.License
+	if err := s.db.Where("license_key = ?", req.LicenseKey).First(&lic).Error; err != nil {
+		return errors.New("无效的 License")
+	}
+
+	result := s.db.Model(&model.Activation{}).
+		Where("license_id = ? AND device_id = ?", lic.ID, req.DeviceID).
+		Update("status", "inactive")
+
+	if result.RowsAffected > 0 && lic.CurrentActivations > 0 {
+		lic.CurrentActivations--
+		s.db.Save(&lic)
+	}
+	return nil
+}
+
+// Heartbeat 客户端心跳 // Logan.Li
+func (s *LicenseService) Heartbeat(req dto.LicenseHeartbeatRequest) (map[string]interface{}, error) {
+	var lic model.License
+	if err := s.db.Where("license_key = ?", req.LicenseKey).First(&lic).Error; err != nil {
+		return nil, errors.New("无效的 License")
+	}
+
+	if lic.Status == model.LicenseStatusRevoked {
+		return nil, errors.New("License 已被吊销")
+	}
+	if lic.Status == model.LicenseStatusExpired || utils.IsLicenseExpired(lic.EndDate) {
+		return nil, errors.New("License 已过期")
+	}
+
+	// 更新心跳时间与在线状态 // Logan.Li
+	s.db.Model(&model.Activation{}).
+		Where("license_id = ? AND device_id = ?", lic.ID, req.DeviceID).
+		Updates(map[string]interface{}{"last_seen_at": time.Now(), "is_online": true})
+
+	return map[string]interface{}{
+		"expires_at": lic.EndDate.Format("2006-01-02 15:04:05"),
+		"days_left":  utils.CalculateDaysLeft(lic.EndDate),
+	}, nil
+}
diff --git a/backend/internal/service/license/license_service.go b/backend/internal/service/license/license_service.go
new file mode 100644
index 0000000..166a801
--- /dev/null
+++ b/backend/internal/service/license/license_service.go
@@ -0,0 +1,343 @@
+package license
+
+import (
+	"backend/internal/dto"
+	"backend/internal/model"
+	"backend/utils"
+	"encoding/json"
+	"errors"
+	"strconv"
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// LicenseService License 业务逻辑层 // Logan.Li
+type LicenseService struct {
+	db *gorm.DB
+}
+
+// NewLicenseService 创建 service 实例 // Logan.Li
+func NewLicenseService(db *gorm.DB) *LicenseService {
+	return &LicenseService{db: db}
+}
+
+// ListQuery 列表查询参数 // Logan.Li
+type ListQuery struct {
+	Keyword    string
+	Status     string
+	CustomerID uint
+	ProductID  uint
+}
+
+// List 分页查询 License // Logan.Li
+func (s *LicenseService) List(page, pageSize int, q ListQuery) ([]dto.LicenseResponse, int64, error) {
+	var licenses []model.License
+	var total int64
+
+	query := s.db.Model(&model.License{}).Preload("Customer").Preload("Product")
+	if q.Keyword != "" {
+		query = query.Where("license_key LIKE ?", "%"+q.Keyword+"%")
+	}
+	if q.Status != "" {
+		query = query.Where("status = ?", q.Status)
+	}
+	if q.CustomerID > 0 {
+		query = query.Where("customer_id = ?", q.CustomerID)
+	}
+	if q.ProductID > 0 {
+		query = query.Where("product_id = ?", q.ProductID)
+	}
+
+	query.Count(&total)
+	if err := query.Order("created_at DESC").
+		Offset((page - 1) * pageSize).Limit(pageSize).
+		Find(&licenses).Error; err != nil {
+		return nil, 0, err
+	}
+
+	results := make([]dto.LicenseResponse, 0, len(licenses))
+	for _, l := range licenses {
+		results = append(results, toLicenseResponse(l))
+	}
+	return results, total, nil
+}
+
+// GetByID 获取 License 详情（含激活记录） // Logan.Li
+func (s *LicenseService) GetByID(id uint) (*dto.LicenseResponse, []dto.ActivationResponse, error) {
+	var lic model.License
+	if err := s.db.Preload("Customer").Preload("Product").Preload("Activations").
+		First(&lic, id).Error; err != nil {
+		return nil, nil, errors.New("License 不存在")
+	}
+
+	resp := toLicenseResponse(lic)
+	activations := make([]dto.ActivationResponse, 0, len(lic.Activations))
+	for _, a := range lic.Activations {
+		activations = append(activations, toActivationResponse(a))
+	}
+	return &resp, activations, nil
+}
+
+// Create 创建 License（支持批量） // Logan.Li
+func (s *LicenseService) Create(req dto.LicenseCreate) ([]dto.LicenseResponse, error) {
+	// 校验客户与产品 // Logan.Li
+	var customer model.Customer
+	if err := s.db.First(&customer, req.CustomerID).Error; err != nil {
+		return nil, errors.New("客户不存在")
+	}
+	var product model.Product
+	if err := s.db.First(&product, req.ProductID).Error; err != nil {
+		return nil, errors.New("产品不存在")
+	}
+
+	if req.MaxActivations <= 0 {
+		req.MaxActivations = 1
+	}
+	if req.Count <= 0 {
+		req.Count = 1
+	}
+	if req.Count > 100 {
+		req.Count = 100
+	}
+
+	// 计算到期日期 // Logan.Li
+	var endDate time.Time
+	if req.Duration == model.DurationForever {
+		endDate = model.PermanentEndDate
+	} else {
+		endDate = time.Now().AddDate(0, 0, req.Duration)
+	}
+
+	licenses := make([]model.License, 0, req.Count)
+	for i := 0; i < req.Count; i++ {
+		licenses = append(licenses, model.License{
+			LicenseKey:     utils.GenerateLicenseKey(),
+			CustomerID:     req.CustomerID,
+			ProductID:      req.ProductID,
+			Status:         model.LicenseStatusInactive,
+			StartDate:      time.Now(),
+			EndDate:        endDate,
+			Duration:       req.Duration,
+			MaxActivations: req.MaxActivations,
+			IsTrial:        req.IsTrial,
+			TrialDays:      req.TrialDays,
+			Notes:          req.Notes,
+		})
+	}
+
+	if err := s.db.Create(&licenses).Error; err != nil {
+		return nil, errors.New("创建 License 失败")
+	}
+
+	results := make([]dto.LicenseResponse, 0, len(licenses))
+	for _, l := range licenses {
+		l.Customer = customer
+		l.Product = product
+		results = append(results, toLicenseResponse(l))
+	}
+	return results, nil
+}
+
+// Update 更新 License // Logan.Li
+func (s *LicenseService) Update(id uint, updates map[string]interface{}) (*dto.LicenseResponse, error) {
+	var lic model.License
+	if err := s.db.First(&lic, id).Error; err != nil {
+		return nil, errors.New("License 不存在")
+	}
+	if err := s.db.Model(&lic).Updates(updates).Error; err != nil {
+		return nil, errors.New("更新 License 失败")
+	}
+	s.db.Preload("Customer").Preload("Product").First(&lic, id)
+	resp := toLicenseResponse(lic)
+	return &resp, nil
+}
+
+// Delete 删除 License（软删除） // Logan.Li
+func (s *LicenseService) Delete(id uint) (*model.License, error) {
+	var lic model.License
+	if err := s.db.First(&lic, id).Error; err != nil {
+		return nil, errors.New("License 不存在")
+	}
+	if err := s.db.Delete(&model.License{}, id).Error; err != nil {
+		return nil, errors.New("删除 License 失败")
+	}
+	return &lic, nil
+}
+
+// Renew 续期 // Logan.Li
+func (s *LicenseService) Renew(id uint, duration int) (*dto.LicenseResponse, error) {
+	var lic model.License
+	if err := s.db.First(&lic, id).Error; err != nil {
+		return nil, errors.New("License 不存在")
+	}
+
+	var newEndDate time.Time
+	if duration == model.DurationForever {
+		newEndDate = model.PermanentEndDate
+	} else {
+		// 续期在原到期日基础上叠加（若已过期则从当前起算） // Logan.Li
+		base := lic.EndDate
+		if utils.IsLicenseExpired(lic.EndDate) {
+			base = time.Now()
+		}
+		newEndDate = base.AddDate(0, 0, duration)
+	}
+
+	lic.EndDate = newEndDate
+	lic.Duration = duration
+	lic.Status = model.LicenseStatusActive
+	if err := s.db.Save(&lic).Error; err != nil {
+		return nil, errors.New("续期失败")
+	}
+	s.db.Preload("Customer").Preload("Product").First(&lic, id)
+	resp := toLicenseResponse(lic)
+	return &resp, nil
+}
+
+// Revoke 吊销（同时停用所有激活） // Logan.Li
+func (s *LicenseService) Revoke(id uint, reason string) (*dto.LicenseResponse, error) {
+	var lic model.License
+	if err := s.db.First(&lic, id).Error; err != nil {
+		return nil, errors.New("License 不存在")
+	}
+	lic.Status = model.LicenseStatusRevoked
+	lic.RevokeReason = reason
+	if err := s.db.Save(&lic).Error; err != nil {
+		return nil, errors.New("吊销失败")
+	}
+	// 级联停用所有激活记录 // Logan.Li
+	s.db.Model(&model.Activation{}).Where("license_id = ?", id).Update("status", "inactive")
+	s.db.Preload("Customer").Preload("Product").First(&lic, id)
+	resp := toLicenseResponse(lic)
+	return &resp, nil
+}
+
+// SetStatus 设置状态（暂停/激活） // Logan.Li
+func (s *LicenseService) SetStatus(id uint, status string) (*dto.LicenseResponse, error) {
+	var lic model.License
+	if err := s.db.First(&lic, id).Error; err != nil {
+		return nil, errors.New("License 不存在")
+	}
+	lic.Status = status
+	if err := s.db.Save(&lic).Error; err != nil {
+		return nil, errors.New("状态更新失败")
+	}
+	s.db.Preload("Customer").Preload("Product").First(&lic, id)
+	resp := toLicenseResponse(lic)
+	return &resp, nil
+}
+
+// GetActivations 获取激活记录 // Logan.Li
+func (s *LicenseService) GetActivations(licenseID uint) ([]dto.ActivationResponse, error) {
+	var activations []model.Activation
+	if err := s.db.Where("license_id = ?", licenseID).Order("created_at DESC").Find(&activations).Error; err != nil {
+		return nil, errors.New("获取激活记录失败")
+	}
+	results := make([]dto.ActivationResponse, 0, len(activations))
+	for _, a := range activations {
+		results = append(results, toActivationResponse(a))
+	}
+	return results, nil
+}
+
+// ForceOffline 强制下线设备 // Logan.Li
+func (s *LicenseService) ForceOffline(licenseID, activationID uint) error {
+	result := s.db.Model(&model.Activation{}).
+		Where("id = ? AND license_id = ?", activationID, licenseID).
+		Updates(map[string]interface{}{"status": "inactive", "is_online": false})
+	if result.Error != nil {
+		return errors.New("强制下线失败")
+	}
+	if result.RowsAffected > 0 {
+		var lic model.License
+		s.db.First(&lic, licenseID)
+		if lic.CurrentActivations > 0 {
+			lic.CurrentActivations--
+			s.db.Save(&lic)
+		}
+	}
+	return nil
+}
+
+// ExportCSV 导出 License 列表为 CSV // Logan.Li
+func (s *LicenseService) ExportCSV(q ListQuery) (string, error) {
+	var licenses []model.License
+	query := s.db.Model(&model.License{}).Preload("Customer").Preload("Product")
+	if q.Status != "" {
+		query = query.Where("status = ?", q.Status)
+	}
+	if q.CustomerID > 0 {
+		query = query.Where("customer_id = ?", q.CustomerID)
+	}
+	if q.ProductID > 0 {
+		query = query.Where("product_id = ?", q.ProductID)
+	}
+	if err := query.Find(&licenses).Error; err != nil {
+		return "", errors.New("导出失败")
+	}
+
+	csv := "License Key,产品,客户,状态,到期时间,激活数/最大激活数,创建时间\n"
+	for _, l := range licenses {
+		csv += l.LicenseKey + ","
+		csv += l.Product.Name + ","
+		csv += l.Customer.Name + ","
+		csv += l.Status + ","
+		csv += l.EndDate.Format("2006-01-02") + ","
+		csv += strconv.Itoa(l.CurrentActivations) + "/" + strconv.Itoa(l.MaxActivations) + ","
+		csv += l.CreatedAt.Format("2006-01-02 15:04:05") + "\n"
+	}
+	return csv, nil
+}
+
+// toLicenseResponse 模型转响应 DTO // Logan.Li
+func toLicenseResponse(l model.License) dto.LicenseResponse {
+	customerName := ""
+	if l.Customer.ID > 0 {
+		customerName = l.Customer.Name
+	}
+	productName := ""
+	if l.Product.ID > 0 {
+		productName = l.Product.Name
+	}
+	return dto.LicenseResponse{
+		ID:                 l.ID,
+		LicenseKey:         l.LicenseKey,
+		CustomerID:         l.CustomerID,
+		CustomerName:       customerName,
+		ProductID:          l.ProductID,
+		ProductName:        productName,
+		Status:             l.Status,
+		StartDate:          l.StartDate.Format("2006-01-02 15:04:05"),
+		EndDate:            l.EndDate.Format("2006-01-02 15:04:05"),
+		Duration:           l.Duration,
+		MaxActivations:     l.MaxActivations,
+		CurrentActivations: l.CurrentActivations,
+		IsTrial:            l.IsTrial,
+		DaysLeft:           utils.CalculateDaysLeft(l.EndDate),
+		Notes:              l.Notes,
+		CreatedAt:          l.CreatedAt.Format("2006-01-02 15:04:05"),
+	}
+}
+
+// toActivationResponse 模型转响应 DTO // Logan.Li
+func toActivationResponse(a model.Activation) dto.ActivationResponse {
+	return dto.ActivationResponse{
+		ID:          a.ID,
+		LicenseID:   a.LicenseID,
+		DeviceID:    a.DeviceID,
+		DeviceName:  a.DeviceName,
+		DeviceInfo:  a.DeviceInfo,
+		IP:          a.IP,
+		Status:      a.Status,
+		IsOnline:    a.IsOnline,
+		ActivatedAt: a.ActivatedAt.Format("2006-01-02 15:04:05"),
+		LastSeenAt:  a.LastSeenAt.Format("2006-01-02 15:04:05"),
+	}
+}
+
+// MarshalForAudit 序列化为 JSON 用于审计日志 // Logan.Li
+func MarshalForAudit(v interface{}) string {
+	b, _ := json.Marshal(v)
+	return string(b)
+}
diff --git a/backend/internal/service/order/order_service.go b/backend/internal/service/order/order_service.go
new file mode 100644
index 0000000..34b4c8c
--- /dev/null
+++ b/backend/internal/service/order/order_service.go
@@ -0,0 +1,459 @@
+package order
+
+import (
+	"backend/internal/dto"
+	"backend/internal/model"
+	"backend/utils"
+	"errors"
+	"fmt"
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// OrderService 订单业务逻辑层 // Logan.Li
+type OrderService struct {
+	db *gorm.DB
+}
+
+// NewOrderService 创建 service 实例 // Logan.Li
+func NewOrderService(db *gorm.DB) *OrderService {
+	return &OrderService{db: db}
+}
+
+// List 分页查询订单 // Logan.Li
+func (s *OrderService) List(page, pageSize int, status string, productID uint) ([]dto.OrderResponse, int64, error) {
+	var orders []model.Order
+	var total int64
+
+	query := s.db.Model(&model.Order{}).Preload("Customer").Preload("Product").Preload("Plan")
+	if status != "" {
+		query = query.Where("status = ?", status)
+	}
+	if productID > 0 {
+		query = query.Where("product_id = ?", productID)
+	}
+
+	query.Count(&total)
+	if err := query.Order("created_at DESC").
+		Offset((page - 1) * pageSize).Limit(pageSize).
+		Find(&orders).Error; err != nil {
+		return nil, 0, err
+	}
+
+	results := make([]dto.OrderResponse, 0, len(orders))
+	for _, o := range orders {
+		results = append(results, toOrderResponse(o))
+	}
+	return results, total, nil
+}
+
+// GetByID 获取订单详情 // Logan.Li
+func (s *OrderService) GetByID(id uint) (*dto.OrderResponse, error) {
+	var order model.Order
+	if err := s.db.Preload("Customer").Preload("Product").Preload("Plan").First(&order, id).Error; err != nil {
+		return nil, errors.New("订单不存在")
+	}
+	resp := toOrderResponse(order)
+	return &resp, nil
+}
+
+// CreateOrder 客户端下单（含防重复购买检查） // Logan.Li
+func (s *OrderService) CreateOrder(req dto.CreateOrderRequest, clientIP, userAgent string) (*dto.CreateOrderResponse, error) {
+	// 1. 查找或创建客户 // Logan.Li
+	var customer model.Customer
+	if err := s.db.Where("email = ?", req.CustomerEmail).First(&customer).Error; err != nil {
+		name := req.CustomerName
+		if name == "" {
+			name = req.CustomerEmail
+		}
+		customer = model.Customer{Name: name, Email: req.CustomerEmail, Status: 1}
+		if err := s.db.Create(&customer).Error; err != nil {
+			return nil, errors.New("创建客户失败")
+		}
+	}
+
+	// 2. 校验产品与计划 // Logan.Li
+	var product model.Product
+	if err := s.db.First(&product, req.ProductID).Error; err != nil {
+		return nil, errors.New("产品不存在")
+	}
+	var plan model.Plan
+	if err := s.db.First(&plan, req.PlanID).Error; err != nil {
+		return nil, errors.New("定价计划不存在")
+	}
+
+	// 3. 防重复购买检查 // Logan.Li
+	checkResult := s.CheckDuplicatePurchase(customer.ID, req.ProductID, plan.PlanType)
+	if !checkResult.AllowPurchase {
+		return nil, fmt.Errorf("重复购买拦截: %s", checkResult.Reason)
+	}
+
+	// 4. 创建订单 // Logan.Li
+	order := model.Order{
+		OrderNo:    utils.GenerateOrderNo(),
+		CustomerID: customer.ID,
+		ProductID:  req.ProductID,
+		PlanID:     req.PlanID,
+		Amount:     plan.Price,
+		Currency:   plan.Currency,
+		Status:     "pending",
+		ClientIP:   clientIP,
+		UserAgent:  userAgent,
+	}
+	if err := s.db.Create(&order).Error; err != nil {
+		return nil, errors.New("创建订单失败")
+	}
+
+	// 5. 选取可用支付渠道 // Logan.Li
+	var gateway model.PaymentGatewayConfig
+	if err := s.db.Where("enabled = ?", true).Order("priority ASC").First(&gateway).Error; err != nil {
+		return nil, errors.New("暂无可用的支付渠道")
+	}
+
+	// 6. 生成收银台地址（占位） // Logan.Li
+	checkoutURL := fmt.Sprintf("https://checkout.%s.com/?order_no=%s", gateway.Gateway, order.OrderNo)
+
+	return &dto.CreateOrderResponse{
+		OrderNo:     order.OrderNo,
+		CheckoutURL: checkoutURL,
+		Amount:      plan.Price,
+		Currency:    plan.Currency,
+		Status:      "pending",
+		Gateway:     gateway.Gateway,
+		ExpiresAt:   time.Now().Add(30 * time.Minute).Format("2006-01-02 15:04:05"),
+	}, nil
+}
+
+// PaymentWebhook 支付回调（幂等 + 事务） // Logan.Li
+func (s *OrderService) PaymentWebhook(req dto.PaymentWebhookRequest, clientIP string) error {
+	// 幂等检查 // Logan.Li
+	var order model.Order
+	if err := s.db.Where("order_no = ?", req.OrderNo).First(&order).Error; err != nil {
+		return errors.New("订单不存在")
+	}
+	if order.Status == "paid" || order.Status == "refunded" {
+		return nil // 已处理，幂等返回
+	}
+
+	// 事务处理 // Logan.Li
+	return s.db.Transaction(func(tx *gorm.DB) error {
+		now := time.Now()
+		switch req.Status {
+		case "paid", "completed":
+			// 更新订单 // Logan.Li
+			order.Status = "paid"
+			order.GatewayOrderNo = req.GatewayOrderNo
+			order.PaymentGateway = req.Gateway
+			order.PaymentMethod = req.Gateway
+			order.PaidAt = &now
+			if err := tx.Save(&order).Error; err != nil {
+				return err
+			}
+
+			// 发放 License // Logan.Li
+			var plan model.Plan
+			tx.First(&plan, order.PlanID)
+
+			var validUntil *time.Time
+			var endDate time.Time
+			if plan.Duration == 0 {
+				endDate = model.PermanentEndDate
+			} else {
+				endDate = now.AddDate(0, 0, plan.Duration)
+				validUntil = &endDate
+			}
+
+			lic := model.License{
+				LicenseKey:     utils.GenerateLicenseKey(),
+				CustomerID:     order.CustomerID,
+				ProductID:      order.ProductID,
+				Status:         model.LicenseStatusActive,
+				StartDate:      now,
+				EndDate:        endDate,
+				Duration:       plan.Duration,
+				MaxActivations: plan.MaxDevices,
+			}
+			if err := tx.Create(&lic).Error; err != nil {
+				return err
+			}
+
+			order.LicenseID = lic.ID
+			tx.Save(&order)
+
+			// 更新权益记录（防重复购买核心） // Logan.Li
+			var ent model.CustomerEntitlement
+			entResult := tx.Where("customer_id = ? AND product_id = ?", order.CustomerID, order.ProductID).First(&ent)
+			renewable := plan.PlanType != "perpetual" && plan.PlanType != "lifetime"
+			if entResult.Error != nil {
+				ent = model.CustomerEntitlement{
+					CustomerID: order.CustomerID,
+					ProductID:  order.ProductID,
+					PlanID:     order.PlanID,
+					LicenseID:  lic.ID,
+					LicenseKey: lic.LicenseKey,
+					PlanType:   plan.PlanType,
+					Status:     "active",
+					ValidFrom:  now,
+					ValidUntil: validUntil,
+					Renewable:  renewable,
+				}
+				tx.Create(&ent)
+			} else {
+				ent.PlanID = order.PlanID
+				ent.LicenseID = lic.ID
+				ent.LicenseKey = lic.LicenseKey
+				ent.PlanType = plan.PlanType
+				ent.Status = "active"
+				ent.ValidFrom = now
+				ent.ValidUntil = validUntil
+				ent.Renewable = renewable
+				tx.Save(&ent)
+			}
+
+			utils.LogSystemAction(tx, "payment_completed", "order", order.ID, order.OrderNo,
+				fmt.Sprintf("订单支付成功，已发放 License: %s", lic.LicenseKey), clientIP)
+
+		case "failed", "cancelled":
+			order.Status = req.Status
+			if err := tx.Save(&order).Error; err != nil {
+				return err
+			}
+
+		case "refunded":
+			order.Status = "refunded"
+			order.RefundAt = &now
+			if err := tx.Save(&order).Error; err != nil {
+				return err
+			}
+			// 吊销关联 License // Logan.Li
+			if order.LicenseID > 0 {
+				tx.Model(&model.License{}).Where("id = ?", order.LicenseID).
+					Updates(map[string]interface{}{"status": model.LicenseStatusRevoked, "revoke_reason": "订单退款"})
+				tx.Model(&model.CustomerEntitlement{}).Where("license_id = ?", order.LicenseID).
+					Update("status", "revoked")
+			}
+		}
+		return nil
+	})
+}
+
+// ManualGrant 手动发放 License（管理后台） // Logan.Li
+func (s *OrderService) ManualGrant(req dto.ManualGrantRequest, operatorID uint, operatorName, clientIP string) (map[string]interface{}, error) {
+	// 查找或创建客户 // Logan.Li
+	var customer model.Customer
+	if err := s.db.Where("email = ?", req.CustomerEmail).First(&customer).Error; err != nil {
+		name := req.CustomerName
+		if name == "" {
+			name = req.CustomerEmail
+		}
+		customer = model.Customer{Name: name, Email: req.CustomerEmail, Status: 1}
+		if err := s.db.Create(&customer).Error; err != nil {
+			return nil, errors.New("创建客户失败")
+		}
+	}
+
+	var plan model.Plan
+	if err := s.db.First(&plan, req.PlanID).Error; err != nil {
+		return nil, errors.New("定价计划不存在")
+	}
+
+	now := time.Now()
+	var endDate time.Time
+	var validUntil *time.Time
+	if plan.Duration == 0 {
+		endDate = model.PermanentEndDate
+	} else {
+		endDate = now.AddDate(0, 0, plan.Duration)
+		validUntil = &endDate
+	}
+
+	lic := model.License{
+		LicenseKey:     utils.GenerateLicenseKey(),
+		CustomerID:     customer.ID,
+		ProductID:      req.ProductID,
+		Status:         model.LicenseStatusActive,
+		StartDate:      now,
+		EndDate:        endDate,
+		Duration:       plan.Duration,
+		MaxActivations: plan.MaxDevices,
+		Notes:          req.Notes,
+	}
+	if err := s.db.Create(&lic).Error; err != nil {
+		return nil, errors.New("创建 License 失败")
+	}
+
+	// 创建/更新权益记录 // Logan.Li
+	renewable := plan.PlanType != "perpetual" && plan.PlanType != "lifetime"
+	var ent model.CustomerEntitlement
+	if err := s.db.Where("customer_id = ? AND product_id = ?", customer.ID, req.ProductID).First(&ent).Error; err != nil {
+		ent = model.CustomerEntitlement{
+			CustomerID: customer.ID, ProductID: req.ProductID, PlanID: req.PlanID,
+			LicenseID: lic.ID, LicenseKey: lic.LicenseKey, PlanType: plan.PlanType,
+			Status: "active", ValidFrom: now, ValidUntil: validUntil, Renewable: renewable,
+		}
+		s.db.Create(&ent)
+	} else {
+		ent.PlanID = req.PlanID
+		ent.LicenseID = lic.ID
+		ent.LicenseKey = lic.LicenseKey
+		ent.PlanType = plan.PlanType
+		ent.Status = "active"
+		ent.ValidFrom = now
+		ent.ValidUntil = validUntil
+		ent.Renewable = renewable
+		s.db.Save(&ent)
+	}
+
+	utils.LogSystemAction(s.db, "manual_grant", "license", lic.ID, lic.LicenseKey,
+		fmt.Sprintf("手动发放 License: %s 给客户 %s", lic.LicenseKey, req.CustomerEmail), clientIP)
+
+	return map[string]interface{}{
+		"license_key": lic.LicenseKey,
+		"license_id":  lic.ID,
+		"customer_id": customer.ID,
+	}, nil
+}
+
+// CheckDuplicatePurchase 防重复购买检测 // Logan.Li
+func (s *OrderService) CheckDuplicatePurchase(customerID, productID uint, newPlanType string) dto.DuplicatePurchaseCheckResponse {
+	var entitlements []model.CustomerEntitlement
+	s.db.Where("customer_id = ? AND product_id = ?", customerID, productID).Find(&entitlements)
+
+	if len(entitlements) == 0 {
+		return dto.DuplicatePurchaseCheckResponse{AllowPurchase: true}
+	}
+
+	// 已有有效的永久/买断授权：禁止重复购买，但可升级 // Logan.Li
+	for _, ent := range entitlements {
+		if ent.Status != "active" {
+			continue
+		}
+		switch ent.PlanType {
+		case "perpetual", "lifetime":
+			return dto.DuplicatePurchaseCheckResponse{
+				AllowPurchase:         false,
+				Reason:                "您已拥有该产品的永久授权，无需重复购买",
+				ExistingEntitlementID: ent.ID,
+				ExistingLicenseKey:    ent.LicenseKey,
+				ExistingPlanType:      ent.PlanType,
+				CanUpgrade:            true,
+			}
+		case "monthly", "yearly":
+			// 订阅可续费 // Logan.Li
+			if ent.Renewable && (newPlanType == "monthly" || newPlanType == "yearly") {
+				return dto.DuplicatePurchaseCheckResponse{
+					AllowPurchase:         true,
+					Reason:                "您有有效的订阅，将为您续费",
+					ExistingEntitlementID: ent.ID,
+					ExistingLicenseKey:    ent.LicenseKey,
+					ExistingPlanType:      ent.PlanType,
+					CanUpgrade:            true,
+				}
+			}
+		}
+	}
+
+	// 已过期但可续费 // Logan.Li
+	for _, ent := range entitlements {
+		if ent.Status == "expired" && ent.Renewable {
+			return dto.DuplicatePurchaseCheckResponse{
+				AllowPurchase:         true,
+				Reason:                "您的订阅已过期，可以续费恢复",
+				ExistingEntitlementID: ent.ID,
+				ExistingLicenseKey:    ent.LicenseKey,
+				ExistingPlanType:      ent.PlanType,
+				CanUpgrade:            true,
+			}
+		}
+	}
+
+	return dto.DuplicatePurchaseCheckResponse{AllowPurchase: true}
+}
+
+// CheckPurchaseStatus 查询购买状态 // Logan.Li
+func (s *OrderService) CheckPurchaseStatus(customerEmail string, productID uint) (*dto.CheckPurchaseStatusResponse, error) {
+	var customer model.Customer
+	if err := s.db.Where("email = ?", customerEmail).First(&customer).Error; err != nil {
+		return &dto.CheckPurchaseStatusResponse{
+			Purchased: false, HasActiveLicense: false, Message: "未找到购买记录",
+		}, nil
+	}
+
+	var ent model.CustomerEntitlement
+	if err := s.db.Where("customer_id = ? AND product_id = ?", customer.ID, productID).
+		Preload("Plan").First(&ent).Error; err != nil {
+		return &dto.CheckPurchaseStatusResponse{
+			Purchased: false, HasActiveLicense: false, Message: "未购买该产品",
+		}, nil
+	}
+
+	daysLeft := 0
+	if ent.ValidUntil != nil {
+		daysLeft = utils.CalculateDaysLeft(*ent.ValidUntil)
+	}
+
+	// 查询 License 设备数 // Logan.Li
+	var lic model.License
+	var currentDevices int64
+	licenseStatus := ""
+	maxDevices := 0
+	if ent.LicenseID > 0 {
+		s.db.First(&lic, ent.LicenseID)
+		licenseStatus = lic.Status
+		maxDevices = lic.MaxActivations
+		s.db.Model(&model.Activation{}).Where("license_id = ?", lic.ID).Count(&currentDevices)
+	}
+
+	isActive := ent.Status == "active" && (ent.ValidUntil == nil || daysLeft > 0)
+
+	var validUntilStr *string
+	if ent.ValidUntil != nil {
+		s := ent.ValidUntil.Format("2006-01-02")
+		validUntilStr = &s
+	}
+
+	return &dto.CheckPurchaseStatusResponse{
+		Purchased:        true,
+		HasActiveLicense: isActive,
+		LicenseKey:       ent.LicenseKey,
+		LicenseStatus:    licenseStatus,
+		PlanType:         ent.PlanType,
+		ValidUntil:       validUntilStr,
+		DaysLeft:         daysLeft,
+		Renewable:        ent.Renewable,
+		MaxDevices:       maxDevices,
+		CurrentDevices:   int(currentDevices),
+		EntitlementID:    ent.ID,
+	}, nil
+}
+
+// toOrderResponse 模型转响应 DTO // Logan.Li
+func toOrderResponse(o model.Order) dto.OrderResponse {
+	resp := dto.OrderResponse{
+		ID:             o.ID,
+		OrderNo:        o.OrderNo,
+		CustomerID:     o.CustomerID,
+		ProductID:      o.ProductID,
+		PlanID:         o.PlanID,
+		LicenseID:      o.LicenseID,
+		Amount:         o.Amount,
+		Currency:       o.Currency,
+		Status:         o.Status,
+		PaymentGateway: o.PaymentGateway,
+		CreatedAt:      o.CreatedAt.Format("2006-01-02 15:04:05"),
+	}
+	if o.Customer.ID > 0 {
+		resp.CustomerName = o.Customer.Name
+	}
+	if o.Product.ID > 0 {
+		resp.ProductName = o.Product.Name
+	}
+	if o.Plan.ID > 0 {
+		resp.PlanName = o.Plan.Name
+	}
+	if o.PaidAt != nil {
+		resp.PaidAt = o.PaidAt.Format("2006-01-02 15:04:05")
+	}
+	return resp
+}
diff --git a/backend/internal/service/plan/plan_service.go b/backend/internal/service/plan/plan_service.go
new file mode 100644
index 0000000..ba3098d
--- /dev/null
+++ b/backend/internal/service/plan/plan_service.go
@@ -0,0 +1,161 @@
+package plan
+
+import (
+	"backend/internal/dto"
+	"backend/internal/model"
+	"backend/utils"
+	"errors"
+
+	"gorm.io/gorm"
+)
+
+// PlanService 定价计划业务逻辑层 // Logan.Li
+type PlanService struct {
+	db *gorm.DB
+}
+
+// NewPlanService 创建 service 实例 // Logan.Li
+func NewPlanService(db *gorm.DB) *PlanService {
+	return &PlanService{db: db}
+}
+
+// List 分页查询定价计划 // Logan.Li
+func (s *PlanService) List(page, pageSize int, productID uint) ([]dto.PlanResponse, int64, error) {
+	var plans []model.Plan
+	var total int64
+
+	query := s.db.Model(&model.Plan{}).Preload("Product")
+	if productID > 0 {
+		query = query.Where("product_id = ?", productID)
+	}
+
+	query.Count(&total)
+	if err := query.Order("sort_order ASC, created_at DESC").
+		Offset((page - 1) * pageSize).Limit(pageSize).
+		Find(&plans).Error; err != nil {
+		return nil, 0, err
+	}
+
+	results := make([]dto.PlanResponse, 0, len(plans))
+	for _, p := range plans {
+		results = append(results, toPlanResponse(p))
+	}
+	return results, total, nil
+}
+
+// GetByProduct 查询某产品的上架计划（公开接口） // Logan.Li
+func (s *PlanService) GetByProduct(productID uint) ([]dto.PlanResponse, error) {
+	var plans []model.Plan
+	if err := s.db.Where("product_id = ? AND status = ?", productID, 1).
+		Order("sort_order ASC").Find(&plans).Error; err != nil {
+		return nil, errors.New("获取定价计划失败")
+	}
+	results := make([]dto.PlanResponse, 0, len(plans))
+	for _, p := range plans {
+		results = append(results, toPlanResponse(p))
+	}
+	return results, nil
+}
+
+// Create 创建定价计划 // Logan.Li
+func (s *PlanService) Create(req dto.PlanCreate) (*dto.PlanResponse, error) {
+	var product model.Product
+	if err := s.db.First(&product, req.ProductID).Error; err != nil {
+		return nil, errors.New("产品不存在")
+	}
+
+	status := 1
+	if req.Status != nil {
+		status = *req.Status
+	}
+	currency := req.Currency
+	if currency == "" {
+		currency = "USD"
+	}
+
+	plan := model.Plan{
+		ProductID:  req.ProductID,
+		Name:       req.Name,
+		PlanType:   req.PlanType,
+		Price:      req.Price,
+		Currency:   currency,
+		Duration:   req.Duration,
+		MaxDevices: req.MaxDevices,
+		Features:   utils.FormatFeatures(req.Features),
+		SortOrder:  req.SortOrder,
+		Status:     status,
+	}
+	if err := s.db.Create(&plan).Error; err != nil {
+		return nil, errors.New("创建定价计划失败")
+	}
+	resp := toPlanResponse(plan)
+	return &resp, nil
+}
+
+// Update 更新定价计划 // Logan.Li
+func (s *PlanService) Update(id uint, req dto.PlanUpdate) (*dto.PlanResponse, error) {
+	var plan model.Plan
+	if err := s.db.First(&plan, id).Error; err != nil {
+		return nil, errors.New("定价计划不存在")
+	}
+
+	updates := map[string]interface{}{}
+	if req.Name != "" {
+		updates["name"] = req.Name
+	}
+	if req.Price != nil {
+		updates["price"] = *req.Price
+	}
+	if req.Currency != "" {
+		updates["currency"] = req.Currency
+	}
+	if req.Duration != nil {
+		updates["duration"] = *req.Duration
+	}
+	if req.MaxDevices != nil {
+		updates["max_devices"] = *req.MaxDevices
+	}
+	if req.Features != nil {
+		updates["features"] = utils.FormatFeatures(req.Features)
+	}
+	if req.SortOrder != nil {
+		updates["sort_order"] = *req.SortOrder
+	}
+	if req.Status != nil {
+		updates["status"] = *req.Status
+	}
+
+	if err := s.db.Model(&plan).Updates(updates).Error; err != nil {
+		return nil, errors.New("更新定价计划失败")
+	}
+	s.db.First(&plan, id)
+	resp := toPlanResponse(plan)
+	return &resp, nil
+}
+
+// Delete 删除定价计划 // Logan.Li
+func (s *PlanService) Delete(id uint) error {
+	return s.db.Delete(&model.Plan{}, id).Error
+}
+
+// ToggleStatus 切换上下架状态 // Logan.Li
+func (s *PlanService) ToggleStatus(id uint, status int) error {
+	return s.db.Model(&model.Plan{}).Where("id = ?", id).Update("status", status).Error
+}
+
+// toPlanResponse 模型转响应 DTO // Logan.Li
+func toPlanResponse(p model.Plan) dto.PlanResponse {
+	return dto.PlanResponse{
+		ID:         p.ID,
+		ProductID:  p.ProductID,
+		Name:       p.Name,
+		PlanType:   p.PlanType,
+		Price:      p.Price,
+		Currency:   p.Currency,
+		Duration:   p.Duration,
+		MaxDevices: p.MaxDevices,
+		Features:   utils.ParseFeatures(p.Features),
+		SortOrder:  p.SortOrder,
+		Status:     p.Status,
+	}
+}
diff --git a/backend/internal/service/product/product_service.go b/backend/internal/service/product/product_service.go
new file mode 100644
index 0000000..3afaa85
--- /dev/null
+++ b/backend/internal/service/product/product_service.go
@@ -0,0 +1,171 @@
+package product
+
+import (
+	"backend/internal/dto"
+	"backend/internal/model"
+	"backend/utils"
+	"errors"
+
+	"gorm.io/gorm"
+)
+
+// ProductService 产品业务逻辑层 // Logan.Li
+type ProductService struct {
+	db *gorm.DB
+}
+
+// NewProductService 创建 service 实例 // Logan.Li
+func NewProductService(db *gorm.DB) *ProductService {
+	return &ProductService{db: db}
+}
+
+// List 分页查询产品 // Logan.Li
+func (s *ProductService) List(page, pageSize int, keyword string) ([]dto.ProductResponse, int64, error) {
+	var products []model.Product
+	var total int64
+
+	query := s.db.Model(&model.Product{})
+	if keyword != "" {
+		query = query.Where("name LIKE ? OR code LIKE ?", "%"+keyword+"%", "%"+keyword+"%")
+	}
+
+	query.Count(&total)
+	if err := query.Order("created_at DESC").
+		Offset((page - 1) * pageSize).Limit(pageSize).
+		Find(&products).Error; err != nil {
+		return nil, 0, err
+	}
+
+	results := make([]dto.ProductResponse, 0, len(products))
+	for _, p := range products {
+		results = append(results, toProductResponse(p))
+	}
+	return results, total, nil
+}
+
+// GetAll 获取全部产品（下拉选项用） // Logan.Li
+func (s *ProductService) GetAll() ([]dto.ProductResponse, error) {
+	var products []model.Product
+	if err := s.db.Where("status = ?", 1).Order("created_at DESC").Find(&products).Error; err != nil {
+		return nil, err
+	}
+	results := make([]dto.ProductResponse, 0, len(products))
+	for _, p := range products {
+		results = append(results, toProductResponse(p))
+	}
+	return results, nil
+}
+
+// GetByID 根据 ID 获取产品 // Logan.Li
+func (s *ProductService) GetByID(id uint) (*dto.ProductResponse, error) {
+	var product model.Product
+	if err := s.db.First(&product, id).Error; err != nil {
+		return nil, errors.New("产品不存在")
+	}
+	resp := toProductResponse(product)
+	return &resp, nil
+}
+
+// Create 创建产品 // Logan.Li
+func (s *ProductService) Create(req dto.ProductCreate) (*dto.ProductResponse, error) {
+	// 检查 code 唯一性 // Logan.Li
+	var count int64
+	s.db.Model(&model.Product{}).Where("code = ?", req.Code).Count(&count)
+	if count > 0 {
+		return nil, errors.New("产品编码已存在")
+	}
+
+	status := 1
+	if req.Status != nil {
+		status = *req.Status
+	}
+	priceModel := req.PriceModel
+	if priceModel == "" {
+		priceModel = "subscription"
+	}
+
+	product := model.Product{
+		Name:        req.Name,
+		Code:        req.Code,
+		Version:     req.Version,
+		Description: req.Description,
+		Features:    utils.FormatFeatures(req.Features),
+		Price:       req.Price,
+		PriceModel:  priceModel,
+		Status:      status,
+	}
+	if err := s.db.Create(&product).Error; err != nil {
+		return nil, errors.New("创建产品失败")
+	}
+	resp := toProductResponse(product)
+	return &resp, nil
+}
+
+// Update 更新产品 // Logan.Li
+func (s *ProductService) Update(id uint, req dto.ProductUpdate) (*dto.ProductResponse, error) {
+	var product model.Product
+	if err := s.db.First(&product, id).Error; err != nil {
+		return nil, errors.New("产品不存在")
+	}
+
+	updates := map[string]interface{}{}
+	if req.Name != "" {
+		updates["name"] = req.Name
+	}
+	if req.Version != "" {
+		updates["version"] = req.Version
+	}
+	updates["description"] = req.Description
+	if req.Features != nil {
+		updates["features"] = utils.FormatFeatures(req.Features)
+	}
+	if req.Price != nil {
+		updates["price"] = *req.Price
+	}
+	if req.PriceModel != "" {
+		updates["price_model"] = req.PriceModel
+	}
+	if req.Status != nil {
+		updates["status"] = *req.Status
+	}
+
+	if err := s.db.Model(&product).Updates(updates).Error; err != nil {
+		return nil, errors.New("更新产品失败")
+	}
+	// 重新查询获取最新数据 // Logan.Li
+	s.db.First(&product, id)
+	resp := toProductResponse(product)
+	return &resp, nil
+}
+
+// Delete 删除产品（软删除） // Logan.Li
+func (s *ProductService) Delete(id uint) error {
+	var count int64
+	s.db.Model(&model.License{}).Where("product_id = ?", id).Count(&count)
+	if count > 0 {
+		return errors.New("该产品下存在 License，无法删除")
+	}
+	return s.db.Delete(&model.Product{}, id).Error
+}
+
+// UpdateStatus 切换产品上下架状态 // Logan.Li
+func (s *ProductService) UpdateStatus(id uint, status int) error {
+	return s.db.Model(&model.Product{}).Where("id = ?", id).Update("status", status).Error
+}
+
+// toProductResponse 模型转响应 DTO // Logan.Li
+func toProductResponse(p model.Product) dto.ProductResponse {
+	return dto.ProductResponse{
+		ID:          p.ID,
+		Name:        p.Name,
+		Code:        p.Code,
+		Version:     p.Version,
+		Description: p.Description,
+		Features:    utils.ParseFeatures(p.Features),
+		Price:       p.Price,
+		PriceModel:  p.PriceModel,
+		Status:      p.Status,
+		CreatedAt:   p.CreatedAt.Format("2006-01-02 15:04:05"),
+		UpdatedAt:   p.UpdatedAt.Format("2006-01-02 15:04:05"),
+	}
+}
diff --git a/backend/internal/service/setting/setting_service.go b/backend/internal/service/setting/setting_service.go
new file mode 100644
index 0000000..dd63ea7
--- /dev/null
+++ b/backend/internal/service/setting/setting_service.go
@@ -0,0 +1,140 @@
+package setting
+
+import (
+	"backend/internal/dto"
+	"backend/internal/model"
+	"errors"
+
+	"gorm.io/gorm"
+)
+
+// SettingService 系统设置业务逻辑层 // Logan.Li
+type SettingService struct {
+	db *gorm.DB
+}
+
+// NewSettingService 创建 service 实例 // Logan.Li
+func NewSettingService(db *gorm.DB) *SettingService {
+	return &SettingService{db: db}
+}
+
+// Get 获取系统设置（单行） // Logan.Li
+func (s *SettingService) Get() (*model.Setting, error) {
+	var setting model.Setting
+	if err := s.db.First(&setting).Error; err != nil {
+		return nil, errors.New("系统设置不存在")
+	}
+	return &setting, nil
+}
+
+// Update 更新系统设置 // Logan.Li
+func (s *SettingService) Update(req dto.SettingUpdate) (*model.Setting, error) {
+	var setting model.Setting
+	if err := s.db.First(&setting).Error; err != nil {
+		return nil, errors.New("系统设置不存在")
+	}
+
+	updates := map[string]interface{}{}
+	if req.SystemName != nil {
+		updates["system_name"] = *req.SystemName
+	}
+	if req.DefaultDuration != nil {
+		updates["default_duration"] = *req.DefaultDuration
+	}
+	if req.DefaultMaxActivations != nil {
+		updates["default_max_activations"] = *req.DefaultMaxActivations
+	}
+	if req.ExpireReminderDays != nil {
+		updates["expire_reminder_days"] = *req.ExpireReminderDays
+	}
+	if req.APIRateLimit != nil {
+		updates["api_rate_limit"] = *req.APIRateLimit
+	}
+	if req.LogRetentionDays != nil {
+		updates["log_retention_days"] = *req.LogRetentionDays
+	}
+
+	if len(updates) > 0 {
+		if err := s.db.Model(&setting).Updates(updates).Error; err != nil {
+			return nil, errors.New("更新系统设置失败")
+		}
+	}
+	s.db.First(&setting)
+	return &setting, nil
+}
+
+// ============ 审计日志 ============
+
+// ListAuditLogs 分页查询审计日志 // Logan.Li
+func (s *SettingService) ListAuditLogs(page, pageSize int, action, targetType string) ([]dto.AuditLogResponse, int64, error) {
+	var logs []model.AuditLog
+	var total int64
+
+	query := s.db.Model(&model.AuditLog{})
+	if action != "" {
+		query = query.Where("action = ?", action)
+	}
+	if targetType != "" {
+		query = query.Where("target_type = ?", targetType)
+	}
+
+	query.Count(&total)
+	if err := query.Order("created_at DESC").
+		Offset((page - 1) * pageSize).Limit(pageSize).
+		Find(&logs).Error; err != nil {
+		return nil, 0, err
+	}
+
+	results := make([]dto.AuditLogResponse, 0, len(logs))
+	for _, l := range logs {
+		results = append(results, dto.AuditLogResponse{
+			ID:         l.ID,
+			Username:   l.Username,
+			Action:     l.Action,
+			TargetType: l.TargetType,
+			TargetID:   l.TargetID,
+			TargetName: l.TargetName,
+			Detail:     l.Detail,
+			Result:     l.Result,
+			IP:         l.IP,
+			CreatedAt:  l.CreatedAt.Format("2006-01-02 15:04:05"),
+		})
+	}
+	return results, total, nil
+}
+
+// ClearAuditLogs 清空审计日志 // Logan.Li
+func (s *SettingService) ClearAuditLogs() error {
+	return s.db.Exec("DELETE FROM audit_logs").Error
+}
+
+// ============ License 模板 ============
+
+// ListLicenseTemplates 查询 License 模板 // Logan.Li
+func (s *SettingService) ListLicenseTemplates() ([]model.LicenseTemplate, error) {
+	var templates []model.LicenseTemplate
+	s.db.Order("created_at DESC").Find(&templates)
+	return templates, nil
+}
+
+// SaveLicenseTemplate 创建/更新 License 模板 // Logan.Li
+func (s *SettingService) SaveLicenseTemplate(tmpl model.LicenseTemplate) (*model.LicenseTemplate, error) {
+	if tmpl.Name == "" {
+		return nil, errors.New("模板名称不能为空")
+	}
+	if tmpl.ID > 0 {
+		if err := s.db.Save(&tmpl).Error; err != nil {
+			return nil, errors.New("更新模板失败")
+		}
+	} else {
+		if err := s.db.Create(&tmpl).Error; err != nil {
+			return nil, errors.New("创建模板失败")
+		}
+	}
+	return &tmpl, nil
+}
+
+// DeleteLicenseTemplate 删除 License 模板 // Logan.Li
+func (s *SettingService) DeleteLicenseTemplate(id uint) error {
+	return s.db.Delete(&model.LicenseTemplate{}, id).Error
+}
diff --git a/backend/main.go b/backend/main.go
new file mode 100644
index 0000000..625554d
--- /dev/null
+++ b/backend/main.go
@@ -0,0 +1,63 @@
+package main
+
+import (
+	"backend/config"
+	"backend/database"
+	"backend/router"
+	"context"
+	"log"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+)
+
+func main() {
+	// 加载配置 // Logan.Li
+	cfg := config.Load()
+
+	// 初始化数据库 // Logan.Li
+	db, err := database.Init(cfg)
+	if err != nil {
+		log.Fatal("数据库初始化失败:", err)
+	}
+
+	// 初始化路由 // Logan.Li
+	r := router.SetupRouter(db, cfg)
+
+	// 单二进制构建时提供嵌入的 Vue 前端；开发模式会自动跳过。 // Logan.Li
+	setupEmbeddedFrontend(r)
+
+	// 启动服务器 // Logan.Li
+	addr := ":" + cfg.Port
+	srv := &http.Server{
+		Addr:    addr,
+		Handler: r,
+	}
+
+	// 优雅关机: 在独立 goroutine 中启动服务器 // Logan.Li
+	go func() {
+		log.Printf("服务器启动在 %s", addr)
+		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+			log.Fatal("服务器启动失败:", err)
+		}
+	}()
+
+	// 等待中断信号 // Logan.Li
+	quit := make(chan os.Signal, 1)
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+	<-quit
+
+	log.Println("正在关闭服务器...")
+
+	// 设置 5 秒超时来关闭服务器 // Logan.Li
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	if err := srv.Shutdown(ctx); err != nil {
+		log.Fatal("服务器强制关闭:", err)
+	}
+
+	log.Println("服务器已优雅关闭")
+}
diff --git a/backend/middleware/auth.go b/backend/middleware/auth.go
new file mode 100644
index 0000000..4325866
--- /dev/null
+++ b/backend/middleware/auth.go
@@ -0,0 +1,56 @@
+package middleware
+
+import (
+	"backend/config"
+	"backend/utils"
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+// AuthMiddleware 校验访问令牌并将用户身份写入请求上下文。 // Logan.Li
+func AuthMiddleware(cfg *config.Config) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		authHeader := c.GetHeader("Authorization")
+		if authHeader == "" {
+			c.JSON(http.StatusUnauthorized, gin.H{
+				"code":    401,
+				"message": "未提供认证令牌",
+				"data":    nil,
+			})
+			c.Abort()
+			return
+		}
+
+		// 检查 Bearer 前缀 // Logan.Li
+		parts := strings.SplitN(authHeader, " ", 2)
+		if len(parts) != 2 || parts[0] != "Bearer" {
+			c.JSON(http.StatusUnauthorized, gin.H{
+				"code":    401,
+				"message": "认证令牌格式错误",
+				"data":    nil,
+			})
+			c.Abort()
+			return
+		}
+
+		token := parts[1]
+		claims, err := utils.ParseToken(token, cfg.JWTSecret)
+		if err != nil {
+			c.JSON(http.StatusUnauthorized, gin.H{
+				"code":    401,
+				"message": "无效的认证令牌",
+				"data":    nil,
+			})
+			c.Abort()
+			return
+		}
+
+		// 将用户身份写入上下文，供后续 handler 使用 // Logan.Li
+		c.Set("user_id", claims.UserID)
+		c.Set("username", claims.Username)
+		c.Set("role", claims.Role)
+		c.Next()
+	}
+}
diff --git a/backend/middleware/cors.go b/backend/middleware/cors.go
new file mode 100644
index 0000000..10183a8
--- /dev/null
+++ b/backend/middleware/cors.go
@@ -0,0 +1,31 @@
+package middleware
+
+import (
+	"backend/config"
+	"time"
+
+	"github.com/gin-contrib/cors"
+	"github.com/gin-gonic/gin"
+)
+
+// CORSMiddleware CORS 中间件，使用显式白名单避免携带凭据时放行任意来源。 // Logan.Li
+func CORSMiddleware(cfg *config.Config) gin.HandlerFunc {
+	origins := cfg.CORSOrigins
+	if len(origins) == 0 {
+		origins = []string{
+			"http://localhost:5181",
+			"http://127.0.0.1:5181",
+			"http://localhost:3000",
+			"http://127.0.0.1:3000",
+		}
+	}
+
+	return cors.New(cors.Config{
+		AllowOrigins:     origins,
+		AllowMethods:     []string{"GET", "POST", "PUT", "DELETE", "PATCH", "OPTIONS"},
+		AllowHeaders:     []string{"Origin", "Content-Type", "Authorization", "X-Requested-With"},
+		ExposeHeaders:    []string{"Content-Length", "Content-Type"},
+		AllowCredentials: true,
+		MaxAge:           12 * time.Hour,
+	})
+}
diff --git a/backend/router/router.go b/backend/router/router.go
new file mode 100644
index 0000000..7218bfd
--- /dev/null
+++ b/backend/router/router.go
@@ -0,0 +1,225 @@
+package router
+
+import (
+	"backend/config"
+	"backend/internal/controller/analytics"
+	"backend/internal/controller/auth"
+	"backend/internal/controller/customer"
+	"backend/internal/controller/entitlement"
+	"backend/internal/controller/license"
+	"backend/internal/controller/order"
+	"backend/internal/controller/plan"
+	"backend/internal/controller/product"
+	"backend/internal/controller/setting"
+	"backend/middleware"
+	"strings"
+
+	"github.com/gin-contrib/gzip"
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+)
+
+// register 同时注册带和不带 trailing slash 的路由 // Logan.Li
+func register(r gin.IRoutes, method, relativePath string, handlers ...gin.HandlerFunc) {
+	isParamRoute := strings.Contains(relativePath, ":")
+
+	switch method {
+	case "GET":
+		r.GET(relativePath, handlers...)
+		if !isParamRoute {
+			r.GET(relativePath+"/", handlers...)
+		}
+	case "POST":
+		r.POST(relativePath, handlers...)
+		if !isParamRoute {
+			r.POST(relativePath+"/", handlers...)
+		}
+	case "PUT":
+		r.PUT(relativePath, handlers...)
+		if !isParamRoute {
+			r.PUT(relativePath+"/", handlers...)
+		}
+	case "DELETE":
+		r.DELETE(relativePath, handlers...)
+		if !isParamRoute {
+			r.DELETE(relativePath+"/", handlers...)
+		}
+	case "PATCH":
+		r.PATCH(relativePath, handlers...)
+		if !isParamRoute {
+			r.PATCH(relativePath+"/", handlers...)
+		}
+	}
+}
+
+// SetupRouter 初始化路由 // Logan.Li
+func SetupRouter(db *gorm.DB, cfg *config.Config) *gin.Engine {
+	gin.SetMode(cfg.Mode)
+
+	r := gin.Default()
+	r.RedirectTrailingSlash = false
+	r.RedirectFixedPath = false
+
+	// Gzip 压缩中间件 // Logan.Li
+	r.Use(gzip.Gzip(gzip.DefaultCompression))
+
+	// CORS 中间件 // Logan.Li
+	r.Use(middleware.CORSMiddleware(cfg))
+
+	// 健康检查 // Logan.Li
+	r.GET("/health", func(c *gin.Context) {
+		c.JSON(200, gin.H{"code": 0, "message": "ok", "data": nil})
+	})
+
+	// 初始化控制器 // Logan.Li
+	authController := auth.NewAuthController(db, cfg)
+	productController := product.NewProductController(db)
+	customerController := customer.NewCustomerController(db)
+	licenseController := license.NewLicenseController(db)
+	planController := plan.NewPlanController(db)
+	orderController := order.NewOrderController(db)
+	entitlementController := entitlement.NewEntitlementController(db)
+	analyticsController := analytics.NewAnalyticsController(db)
+	settingController := setting.NewSettingController(db)
+
+	api := r.Group("/api")
+	{
+		// ============ 认证路由（无需 JWT） ============
+		authGroup := api.Group("/auth")
+		{
+			register(authGroup, "POST", "/login", authController.Login)
+		}
+
+		// ============ 客户端授权契约（无需认证，供外部工具调用） ============
+		clientAPI := api.Group("/v1")
+		{
+			// License 验证 / 激活 / 停用 / 心跳
+			register(clientAPI, "POST", "/license/verify", licenseController.Verify)
+			register(clientAPI, "POST", "/license/activate", licenseController.ActivateDevice)
+			register(clientAPI, "POST", "/license/deactivate", licenseController.Deactivate)
+			register(clientAPI, "POST", "/license/heartbeat", licenseController.Heartbeat)
+
+			// 产品定价查询（展示用）
+			clientAPI.GET("/products/:product_id/plans", planController.GetByProduct)
+
+			// 订单与支付（客户端购买入口 + 支付回调）
+			register(clientAPI, "POST", "/orders", orderController.CreateOrder)
+			register(clientAPI, "POST", "/webhooks/payment", orderController.PaymentWebhook)
+			register(clientAPI, "POST", "/purchase/check", orderController.CheckDuplicatePurchase)
+			register(clientAPI, "POST", "/purchase/status", orderController.CheckPurchaseStatus)
+
+			// 客户权益查询（通过邮箱）
+			register(clientAPI, "GET", "/entitlements/my", entitlementController.GetByEmail)
+		}
+
+		// ============ 需要认证的管理路由 ============
+		protected := api.Group("", middleware.AuthMiddleware(cfg))
+		{
+			// 认证相关
+			register(protected, "GET", "/auth/me", authController.Me)
+			register(protected, "PUT", "/auth/password", authController.ChangePassword)
+
+			// 产品管理
+			products := protected.Group("/products")
+			{
+				register(products, "GET", "", productController.List)
+				register(products, "GET", "/all", productController.GetAll)
+				register(products, "POST", "", productController.Create)
+				register(products, "GET", "/:id", productController.Get)
+				register(products, "PUT", "/:id", productController.Update)
+				register(products, "DELETE", "/:id", productController.Delete)
+				register(products, "PATCH", "/:id/status", productController.UpdateStatus)
+			}
+
+			// 客户管理
+			customers := protected.Group("/customers")
+			{
+				register(customers, "GET", "", customerController.List)
+				register(customers, "GET", "/all", customerController.GetAll)
+				register(customers, "POST", "", customerController.Create)
+				register(customers, "GET", "/:id", customerController.Get)
+				register(customers, "PUT", "/:id", customerController.Update)
+				register(customers, "DELETE", "/:id", customerController.Delete)
+				register(customers, "PATCH", "/:id/status", customerController.UpdateStatus)
+			}
+
+			// License 管理
+			licenses := protected.Group("/licenses")
+			{
+				register(licenses, "GET", "", licenseController.List)
+				register(licenses, "POST", "", licenseController.Create)
+				register(licenses, "GET", "/export", licenseController.Export)
+				register(licenses, "GET", "/:id", licenseController.Get)
+				register(licenses, "PUT", "/:id", licenseController.Update)
+				register(licenses, "DELETE", "/:id", licenseController.Delete)
+				register(licenses, "POST", "/:id/renew", licenseController.Renew)
+				register(licenses, "POST", "/:id/revoke", licenseController.Revoke)
+				register(licenses, "POST", "/:id/suspend", licenseController.Suspend)
+				register(licenses, "POST", "/:id/activate", licenseController.Activate)
+				register(licenses, "GET", "/:id/activations", licenseController.GetActivations)
+				register(licenses, "POST", "/:id/activations/:activationId/offline", licenseController.ForceOffline)
+			}
+
+			// 定价计划管理
+			plans := protected.Group("/plans")
+			{
+				register(plans, "GET", "", planController.List)
+				register(plans, "POST", "", planController.Create)
+				register(plans, "PUT", "/:id", planController.Update)
+				register(plans, "DELETE", "/:id", planController.Delete)
+				register(plans, "PATCH", "/:id/status", planController.ToggleStatus)
+			}
+
+			// 订单管理
+			orders := protected.Group("/orders")
+			{
+				register(orders, "GET", "", orderController.List)
+				register(orders, "GET", "/:id", orderController.GetDetail)
+				register(orders, "POST", "/manual-grant", orderController.ManualGrant)
+			}
+
+			// 客户权益管理
+			entitlements := protected.Group("/entitlements")
+			{
+				register(entitlements, "GET", "", entitlementController.List)
+				register(entitlements, "GET", "/:id", entitlementController.Get)
+				register(entitlements, "POST", "/:id/revoke", entitlementController.Revoke)
+				register(entitlements, "POST", "/:id/renew", entitlementController.Renew)
+			}
+
+			// 仪表板与数据分析
+			dashboard := protected.Group("/dashboard")
+			{
+				register(dashboard, "GET", "/stats", analyticsController.GetDashboardStats)
+				register(dashboard, "GET", "/expiring", analyticsController.GetExpiringLicenses)
+				register(dashboard, "GET", "/activities", analyticsController.GetRecentActivities)
+				register(dashboard, "GET", "/online-stats", analyticsController.GetOnlineStats)
+				register(dashboard, "GET", "/revenue", analyticsController.GetRevenueStats)
+			}
+
+			analyticsGroup := protected.Group("/analytics")
+			{
+				register(analyticsGroup, "GET", "/license-growth", analyticsController.GetLicenseGrowth)
+				register(analyticsGroup, "GET", "/product-distribution", analyticsController.GetProductDistribution)
+			}
+
+			// 日志审计与系统设置
+			logs := protected.Group("/logs")
+			{
+				register(logs, "GET", "", settingController.ListAuditLogs)
+				register(logs, "DELETE", "/clear", settingController.ClearAuditLogs)
+			}
+
+			system := protected.Group("/settings")
+			{
+				register(system, "GET", "", settingController.Get)
+				register(system, "PUT", "", settingController.Update)
+				register(system, "GET", "/license-templates", settingController.ListLicenseTemplates)
+				register(system, "POST", "/license-templates", settingController.SaveLicenseTemplate)
+				register(system, "DELETE", "/license-templates/:id", settingController.DeleteLicenseTemplate)
+			}
+		}
+	}
+
+	return r
+}
diff --git a/backend/static/.gitkeep b/backend/static/.gitkeep
new file mode 100644
index 0000000..3c67a29
--- /dev/null
+++ b/backend/static/.gitkeep
@@ -0,0 +1,3 @@
+# 此目录用于存放构建时嵌入的前端资源。
+# 开发模式下为空，后端仅提供 API。
+# 执行 `./run.sh build` 时，frontend/dist 的内容会被复制到此处。
diff --git a/backend/utils/audit.go b/backend/utils/audit.go
new file mode 100644
index 0000000..c8d5eaf
--- /dev/null
+++ b/backend/utils/audit.go
@@ -0,0 +1,62 @@
+package utils
+
+import (
+	"backend/internal/model"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+)
+
+// LogAction 记录操作日志（成功） // Logan.Li
+func LogAction(db *gorm.DB, c *gin.Context, action, targetType string, targetID uint, targetName, oldData, newData, detail string) {
+	logEntry := model.AuditLog{
+		Action:     action,
+		TargetType: targetType,
+		TargetID:   targetID,
+		TargetName: targetName,
+		OldData:    oldData,
+		NewData:    newData,
+		Detail:     detail,
+		Result:     "success",
+		IP:         c.ClientIP(),
+		CreatedAt:  time.Now(),
+	}
+
+	// 从上下文中获取操作人信息（管理后台调用时存在） // Logan.Li
+	if c != nil {
+		if userID, exists := c.Get("user_id"); exists {
+			if id, ok := userID.(uint); ok {
+				logEntry.UserID = id
+			}
+		}
+		if username, exists := c.Get("username"); exists {
+			if name, ok := username.(string); ok {
+				logEntry.Username = name
+			}
+		}
+	}
+
+	db.Create(&logEntry)
+}
+
+// LogSystemAction 记录系统操作日志（无 HTTP 上下文，如支付回调） // Logan.Li
+func LogSystemAction(db *gorm.DB, action, targetType string, targetID uint, targetName, detail, ip string) {
+	db.Create(&model.AuditLog{
+		UserID:     0,
+		Username:   "system",
+		Action:     action,
+		TargetType: targetType,
+		TargetID:   targetID,
+		TargetName: targetName,
+		Detail:     detail,
+		Result:     "success",
+		IP:         ip,
+		CreatedAt:  time.Now(),
+	})
+}
+
+// GetClientIP 获取客户端真实 IP（兼容代理） // Logan.Li
+func GetClientIP(c *gin.Context) string {
+	return c.ClientIP()
+}
diff --git a/backend/utils/jwt.go b/backend/utils/jwt.go
new file mode 100644
index 0000000..8f45f4a
--- /dev/null
+++ b/backend/utils/jwt.go
@@ -0,0 +1,54 @@
+package utils
+
+import (
+	"errors"
+	"time"
+
+	"github.com/golang-jwt/jwt/v5"
+)
+
+// Claims JWT 声明 // Logan.Li
+type Claims struct {
+	UserID   uint   `json:"user_id"`
+	Username string `json:"username"`
+	Role     string `json:"role"`
+	jwt.RegisteredClaims
+}
+
+// GenerateToken 生成 JWT 令牌（HS256，24h 过期） // Logan.Li
+func GenerateToken(userID uint, username, role, secret string) (string, error) {
+	claims := Claims{
+		UserID:   userID,
+		Username: username,
+		Role:     role,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(time.Now().Add(24 * time.Hour)),
+			IssuedAt:  jwt.NewNumericDate(time.Now()),
+			Issuer:    "opsx-licence",
+		},
+	}
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	return token.SignedString([]byte(secret))
+}
+
+// ParseToken 解析并校验 JWT 令牌 // Logan.Li
+func ParseToken(tokenString, secret string) (*Claims, error) {
+	token, err := jwt.ParseWithClaims(tokenString, &Claims{}, func(token *jwt.Token) (interface{}, error) {
+		// 确保使用 HMAC 签名方法，防止算法混淆攻击 // Logan.Li
+		if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
+			return nil, errors.New("非预期的签名算法")
+		}
+		return []byte(secret), nil
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	if claims, ok := token.Claims.(*Claims); ok && token.Valid {
+		return claims, nil
+	}
+
+	return nil, errors.New("无效的令牌")
+}
diff --git a/backend/utils/license.go b/backend/utils/license.go
new file mode 100644
index 0000000..8528b43
--- /dev/null
+++ b/backend/utils/license.go
@@ -0,0 +1,89 @@
+package utils
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"fmt"
+	"strings"
+	"time"
+)
+
+// GenerateLicenseKey 生成 License 密钥（格式: LIC-YYYY-XXXX-XXXX-XXXX-XXXX） // Logan.Li
+func GenerateLicenseKey() string {
+	bytes := make([]byte, 16)
+	_, _ = rand.Read(bytes)
+
+	year := time.Now().Year()
+	part1 := hex.EncodeToString(bytes[0:4])
+	part2 := hex.EncodeToString(bytes[4:8])
+	part3 := hex.EncodeToString(bytes[8:12])
+	part4 := hex.EncodeToString(bytes[12:16])
+
+	return fmt.Sprintf("LIC-%d-%s-%s-%s-%s",
+		year,
+		strings.ToUpper(part1[:4]),
+		strings.ToUpper(part2[:4]),
+		strings.ToUpper(part3[:4]),
+		strings.ToUpper(part4[:4]))
+}
+
+// GenerateOrderNo 生成唯一订单号（格式: ORD-YYYYMMDD-XXXXXXXX） // Logan.Li
+func GenerateOrderNo() string {
+	bytes := make([]byte, 4)
+	_, _ = rand.Read(bytes)
+	return fmt.Sprintf("ORD-%s-%s", time.Now().Format("20060102"), strings.ToUpper(hex.EncodeToString(bytes)))
+}
+
+// CalculateDaysLeft 计算剩余天数（向下取整，最小为 0） // Logan.Li
+func CalculateDaysLeft(endDate time.Time) int {
+	diff := endDate.Sub(time.Now())
+	days := int(diff.Hours() / 24)
+	if days < 0 {
+		return 0
+	}
+	return days
+}
+
+// IsLicenseExpired 检查 License 是否过期 // Logan.Li
+func IsLicenseExpired(endDate time.Time) bool {
+	return time.Now().After(endDate)
+}
+
+// IsExpiringSoon 检查 License 是否即将到期 // Logan.Li
+func IsExpiringSoon(endDate time.Time, warningDays int) bool {
+	daysLeft := CalculateDaysLeft(endDate)
+	return daysLeft > 0 && daysLeft <= warningDays
+}
+
+// ParseFeatures 解析产品功能列表 JSON 为字符串切片 // Logan.Li
+func ParseFeatures(featuresJSON string) []string {
+	if featuresJSON == "" {
+		return []string{}
+	}
+	trimmed := strings.Trim(featuresJSON, "[]")
+	if trimmed == "" {
+		return []string{}
+	}
+	// 简单解析：去引号后按逗号分割 // Logan.Li
+	trimmed = strings.ReplaceAll(trimmed, `"`, "")
+	parts := strings.Split(trimmed, ",")
+	result := make([]string, 0, len(parts))
+	for _, p := range parts {
+		if s := strings.TrimSpace(p); s != "" {
+			result = append(result, s)
+		}
+	}
+	return result
+}
+
+// FormatFeatures 将功能列表格式化为 JSON 字符串 // Logan.Li
+func FormatFeatures(features []string) string {
+	if len(features) == 0 {
+		return "[]"
+	}
+	quoted := make([]string, len(features))
+	for i, f := range features {
+		quoted[i] = fmt.Sprintf(`"%s"`, f)
+	}
+	return fmt.Sprintf("[%s]", strings.Join(quoted, ","))
+}
diff --git a/backend/utils/password.go b/backend/utils/password.go
new file mode 100644
index 0000000..220f86d
--- /dev/null
+++ b/backend/utils/password.go
@@ -0,0 +1,14 @@
+package utils
+
+import "golang.org/x/crypto/bcrypt"
+
+// HashPassword 对明文密码进行 bcrypt 哈希 // Logan.Li
+func HashPassword(password string) string {
+	hashed, _ := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
+	return string(hashed)
+}
+
+// CheckPassword 校验明文密码与哈希是否匹配 // Logan.Li
+func CheckPassword(password, hash string) bool {
+	return bcrypt.CompareHashAndPassword([]byte(hash), []byte(password)) == nil
+}
diff --git a/frontend/.env.development b/frontend/.env.development
new file mode 100644
index 0000000..02f1c27
--- /dev/null
+++ b/frontend/.env.development
@@ -0,0 +1,2 @@
+# 开发环境
+VITE_API_BASE_URL=/api
diff --git a/frontend/.env.production b/frontend/.env.production
new file mode 100644
index 0000000..65506b6
--- /dev/null
+++ b/frontend/.env.production
@@ -0,0 +1,2 @@
+# 生产环境（嵌入单二进制时，前端与后端同源，走相对路径）
+VITE_API_BASE_URL=/api
diff --git a/frontend/index.html b/frontend/index.html
new file mode 100644
index 0000000..c4b1fc6
--- /dev/null
+++ b/frontend/index.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" href="/favicon.ico" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>opsx-licence 授权管理平台</title>
+  </head>
+  <body>
+    <div id="app"></div>
+    <script type="module" src="/src/main.js"></script>
+  </body>
+</html>
diff --git a/frontend/package-lock.json b/frontend/package-lock.json
new file mode 100644
index 0000000..f2c5b88
--- /dev/null
+++ b/frontend/package-lock.json
@@ -0,0 +1,2310 @@
+{
+  "name": "opsx-licence-frontend",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "opsx-licence-frontend",
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+        "element-plus": "^2.5.0",
+        "pinia": "^2.1.7",
+        "vue": "^3.4.0",
+        "vue-echarts": "^6.6.8",
+        "vue-router": "^4.2.5"
+      },
+      "devDependencies": {
+        "@vitejs/plugin-vue": "^5.0.3",
+        "sass": "^1.69.7",
+        "vite": "^5.0.11"
+      }
+    },
+    "node_modules/@babel/helper-string-parser": {
+      "version": "7.29.7",
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+      "license": "MIT",
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+      }
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+    "node_modules/@babel/helper-validator-identifier": {
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+      "integrity": "sha512-OFXkDJKcrlx5su2XbzJvj/34Q3m6PvyCZkVPHGYpcCJ52ek4U/ymZyfuV1nKE23AyBJ51E/6Yr0mhZ7xGTO4ag==",
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "tslib": "2.3.0"
+      }
+    }
+  }
+}
diff --git a/frontend/package.json b/frontend/package.json
new file mode 100644
index 0000000..416b5c9
--- /dev/null
+++ b/frontend/package.json
@@ -0,0 +1,27 @@
+{
+  "name": "opsx-licence-frontend",
+  "version": "1.0.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "vue": "^3.4.0",
+    "vue-router": "^4.2.5",
+    "pinia": "^2.1.7",
+    "element-plus": "^2.5.0",
+    "@element-plus/icons-vue": "^2.3.1",
+    "axios": "^1.6.5",
+    "echarts": "^5.4.3",
+    "vue-echarts": "^6.6.8",
+    "dayjs": "^1.11.10"
+  },
+  "devDependencies": {
+    "@vitejs/plugin-vue": "^5.0.3",
+    "vite": "^5.0.11",
+    "sass": "^1.69.7"
+  }
+}
diff --git a/frontend/src/App.vue b/frontend/src/App.vue
new file mode 100644
index 0000000..78e81f9
--- /dev/null
+++ b/frontend/src/App.vue
@@ -0,0 +1,19 @@
+<template>
+  <router-view />
+</template>
+
+<script setup>
+// 根组件，仅承载 router-view // Logan.Li
+</script>
+
+<style>
+html,
+body,
+#app {
+  height: 100%;
+  margin: 0;
+  padding: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue',
+    Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
+}
+</style>
diff --git a/frontend/src/api/analytics.js b/frontend/src/api/analytics.js
new file mode 100644
index 0000000..1c361b6
--- /dev/null
+++ b/frontend/src/api/analytics.js
@@ -0,0 +1,31 @@
+import request from './request'
+
+// 数据分析与仪表板 API // Logan.Li
+
+export function getDashboardStats() {
+  return request({ url: '/dashboard/stats', method: 'get' })
+}
+
+export function getExpiringLicenses(days = 30) {
+  return request({ url: '/dashboard/expiring', method: 'get', params: { days } })
+}
+
+export function getRecentActivities(limit = 10) {
+  return request({ url: '/dashboard/activities', method: 'get', params: { limit } })
+}
+
+export function getOnlineStats() {
+  return request({ url: '/dashboard/online-stats', method: 'get' })
+}
+
+export function getRevenueStats() {
+  return request({ url: '/dashboard/revenue', method: 'get' })
+}
+
+export function getLicenseGrowth() {
+  return request({ url: '/analytics/license-growth', method: 'get' })
+}
+
+export function getProductDistribution() {
+  return request({ url: '/analytics/product-distribution', method: 'get' })
+}
diff --git a/frontend/src/api/auth.js b/frontend/src/api/auth.js
new file mode 100644
index 0000000..902b71a
--- /dev/null
+++ b/frontend/src/api/auth.js
@@ -0,0 +1,27 @@
+import request from './request'
+
+// 登录 // Logan.Li
+export function login(data) {
+  return request({
+    url: '/auth/login',
+    method: 'post',
+    data,
+  })
+}
+
+// 获取当前用户信息 // Logan.Li
+export function getMe() {
+  return request({
+    url: '/auth/me',
+    method: 'get',
+  })
+}
+
+// 修改密码 // Logan.Li
+export function changePassword(data) {
+  return request({
+    url: '/auth/password',
+    method: 'put',
+    data,
+  })
+}
diff --git a/frontend/src/api/customer.js b/frontend/src/api/customer.js
new file mode 100644
index 0000000..2e5313a
--- /dev/null
+++ b/frontend/src/api/customer.js
@@ -0,0 +1,31 @@
+import request from './request'
+
+// 客户管理 API // Logan.Li
+
+export function getCustomers(params) {
+  return request({ url: '/customers', method: 'get', params })
+}
+
+export function getAllCustomers() {
+  return request({ url: '/customers/all', method: 'get' })
+}
+
+export function getCustomer(id) {
+  return request({ url: `/customers/${id}`, method: 'get' })
+}
+
+export function createCustomer(data) {
+  return request({ url: '/customers', method: 'post', data })
+}
+
+export function updateCustomer(id, data) {
+  return request({ url: `/customers/${id}`, method: 'put', data })
+}
+
+export function deleteCustomer(id) {
+  return request({ url: `/customers/${id}`, method: 'delete' })
+}
+
+export function updateCustomerStatus(id, status) {
+  return request({ url: `/customers/${id}/status`, method: 'patch', data: { status } })
+}
diff --git a/frontend/src/api/entitlement.js b/frontend/src/api/entitlement.js
new file mode 100644
index 0000000..8721431
--- /dev/null
+++ b/frontend/src/api/entitlement.js
@@ -0,0 +1,19 @@
+import request from './request'
+
+// 客户权益 API // Logan.Li
+
+export function getEntitlements(params) {
+  return request({ url: '/entitlements', method: 'get', params })
+}
+
+export function getEntitlement(id) {
+  return request({ url: `/entitlements/${id}`, method: 'get' })
+}
+
+export function revokeEntitlement(id) {
+  return request({ url: `/entitlements/${id}/revoke`, method: 'post' })
+}
+
+export function renewEntitlement(id, planId) {
+  return request({ url: `/entitlements/${id}/renew`, method: 'post', data: { plan_id: planId } })
+}
diff --git a/frontend/src/api/license.js b/frontend/src/api/license.js
new file mode 100644
index 0000000..de9a237
--- /dev/null
+++ b/frontend/src/api/license.js
@@ -0,0 +1,51 @@
+import request from './request'
+
+// License 管理 API // Logan.Li
+
+export function getLicenses(params) {
+  return request({ url: '/licenses', method: 'get', params })
+}
+
+export function getLicense(id) {
+  return request({ url: `/licenses/${id}`, method: 'get' })
+}
+
+export function createLicense(data) {
+  return request({ url: '/licenses', method: 'post', data })
+}
+
+export function updateLicense(id, data) {
+  return request({ url: `/licenses/${id}`, method: 'put', data })
+}
+
+export function deleteLicense(id) {
+  return request({ url: `/licenses/${id}`, method: 'delete' })
+}
+
+export function renewLicense(id, duration) {
+  return request({ url: `/licenses/${id}/renew`, method: 'post', data: { duration } })
+}
+
+export function revokeLicense(id, reason) {
+  return request({ url: `/licenses/${id}/revoke`, method: 'post', data: { reason } })
+}
+
+export function suspendLicense(id) {
+  return request({ url: `/licenses/${id}/suspend`, method: 'post' })
+}
+
+export function activateLicense(id) {
+  return request({ url: `/licenses/${id}/activate`, method: 'post' })
+}
+
+export function getActivations(id) {
+  return request({ url: `/licenses/${id}/activations`, method: 'get' })
+}
+
+export function forceOffline(licenseId, activationId) {
+  return request({ url: `/licenses/${licenseId}/activations/${activationId}/offline`, method: 'post' })
+}
+
+export function exportLicenses(params) {
+  return request({ url: '/licenses/export', method: 'get', params, responseType: 'blob' })
+}
diff --git a/frontend/src/api/order.js b/frontend/src/api/order.js
new file mode 100644
index 0000000..e8d3fa9
--- /dev/null
+++ b/frontend/src/api/order.js
@@ -0,0 +1,15 @@
+import request from './request'
+
+// 订单管理 API // Logan.Li
+
+export function getOrders(params) {
+  return request({ url: '/orders', method: 'get', params })
+}
+
+export function getOrder(id) {
+  return request({ url: `/orders/${id}`, method: 'get' })
+}
+
+export function manualGrant(data) {
+  return request({ url: '/orders/manual-grant', method: 'post', data })
+}
diff --git a/frontend/src/api/plan.js b/frontend/src/api/plan.js
new file mode 100644
index 0000000..d4275a2
--- /dev/null
+++ b/frontend/src/api/plan.js
@@ -0,0 +1,23 @@
+import request from './request'
+
+// 定价计划 API // Logan.Li
+
+export function getPlans(params) {
+  return request({ url: '/plans', method: 'get', params })
+}
+
+export function createPlan(data) {
+  return request({ url: '/plans', method: 'post', data })
+}
+
+export function updatePlan(id, data) {
+  return request({ url: `/plans/${id}`, method: 'put', data })
+}
+
+export function deletePlan(id) {
+  return request({ url: `/plans/${id}`, method: 'delete' })
+}
+
+export function togglePlanStatus(id, status) {
+  return request({ url: `/plans/${id}/status`, method: 'patch', data: { status } })
+}
diff --git a/frontend/src/api/product.js b/frontend/src/api/product.js
new file mode 100644
index 0000000..e6537a3
--- /dev/null
+++ b/frontend/src/api/product.js
@@ -0,0 +1,31 @@
+import request from './request'
+
+// 产品管理 API // Logan.Li
+
+export function getProducts(params) {
+  return request({ url: '/products', method: 'get', params })
+}
+
+export function getAllProducts() {
+  return request({ url: '/products/all', method: 'get' })
+}
+
+export function getProduct(id) {
+  return request({ url: `/products/${id}`, method: 'get' })
+}
+
+export function createProduct(data) {
+  return request({ url: '/products', method: 'post', data })
+}
+
+export function updateProduct(id, data) {
+  return request({ url: `/products/${id}`, method: 'put', data })
+}
+
+export function deleteProduct(id) {
+  return request({ url: `/products/${id}`, method: 'delete' })
+}
+
+export function updateProductStatus(id, status) {
+  return request({ url: `/products/${id}/status`, method: 'patch', data: { status } })
+}
diff --git a/frontend/src/api/request.js b/frontend/src/api/request.js
new file mode 100644
index 0000000..b1075f1
--- /dev/null
+++ b/frontend/src/api/request.js
@@ -0,0 +1,95 @@
+import axios from 'axios'
+import { ElMessage, ElMessageBox } from 'element-plus'
+import { useUserStore } from '@/stores/user'
+
+// 创建 axios 实例 // Logan.Li
+const request = axios.create({
+  baseURL: import.meta.env.VITE_API_BASE_URL || '/api',
+  timeout: 30000,
+  headers: {
+    'Content-Type': 'application/json',
+  },
+})
+
+// 请求拦截器：注入 Bearer token // Logan.Li
+request.interceptors.request.use(
+  (config) => {
+    const userStore = useUserStore()
+    if (userStore.token) {
+      config.headers.Authorization = `Bearer ${userStore.token}`
+    }
+    return config
+  },
+  (error) => Promise.reject(error)
+)
+
+// 响应拦截器：统一处理 code 与 HTTP 错误 // Logan.Li
+request.interceptors.response.use(
+  (response) => {
+    const res = response.data
+
+    // code 为 0 或 200 视为成功 // Logan.Li
+    if (res.code === 0 || res.code === 200) {
+      return res
+    }
+
+    // 401：登录态失效，引导重新登录 // Logan.Li
+    if (res.code === 401) {
+      ElMessageBox.confirm('登录状态已过期，请重新登录', '系统提示', {
+        confirmButtonText: '重新登录',
+        cancelButtonText: '取消',
+        type: 'warning',
+      }).then(() => {
+        const userStore = useUserStore()
+        userStore.logout()
+        window.location.href = '/login'
+      })
+      return Promise.reject(new Error(res.message || '未授权'))
+    }
+
+    // 其他业务错误：仅错误用 ElMessage 提示（常规操作不打扰） // Logan.Li
+    ElMessage.error(res.message || '请求失败')
+    return Promise.reject(new Error(res.message || 'Error'))
+  },
+  (error) => {
+    let message = '网络错误'
+
+    if (error.response) {
+      switch (error.response.status) {
+        case 400:
+          message = error.response.data?.message || '请求参数错误'
+          break
+        case 401:
+          message = '未授权，请重新登录'
+          {
+            const userStore = useUserStore()
+            userStore.logout()
+            setTimeout(() => {
+              window.location.href = '/login'
+            }, 1500)
+          }
+          break
+        case 403:
+          message = '拒绝访问'
+          break
+        case 404:
+          message = '请求的资源不存在'
+          break
+        case 500:
+          message = '服务器内部错误'
+          break
+        default:
+          message = `连接错误 ${error.response.status}`
+      }
+    } else if (error.request) {
+      message = '网络连接失败，请检查网络'
+    } else {
+      message = error.message
+    }
+
+    ElMessage.error(message)
+    return Promise.reject(error)
+  }
+)
+
+export default request
diff --git a/frontend/src/api/setting.js b/frontend/src/api/setting.js
new file mode 100644
index 0000000..12c01b3
--- /dev/null
+++ b/frontend/src/api/setting.js
@@ -0,0 +1,31 @@
+import request from './request'
+
+// 系统设置与日志 API // Logan.Li
+
+export function getSetting() {
+  return request({ url: '/settings', method: 'get' })
+}
+
+export function updateSetting(data) {
+  return request({ url: '/settings', method: 'put', data })
+}
+
+export function getLicenseTemplates() {
+  return request({ url: '/settings/license-templates', method: 'get' })
+}
+
+export function saveLicenseTemplate(data) {
+  return request({ url: '/settings/license-templates', method: 'post', data })
+}
+
+export function deleteLicenseTemplate(id) {
+  return request({ url: `/settings/license-templates/${id}`, method: 'delete' })
+}
+
+export function getAuditLogs(params) {
+  return request({ url: '/logs', method: 'get', params })
+}
+
+export function clearAuditLogs() {
+  return request({ url: '/logs/clear', method: 'delete' })
+}
diff --git a/frontend/src/layouts/MainLayout.vue b/frontend/src/layouts/MainLayout.vue
new file mode 100644
index 0000000..fd57f2d
--- /dev/null
+++ b/frontend/src/layouts/MainLayout.vue
@@ -0,0 +1,207 @@
+<template>
+  <el-container class="layout-container">
+    <!-- 侧边栏 -->
+    <el-aside :width="isCollapse ? '64px' : '220px'" class="layout-aside">
+      <div class="logo">
+        <el-icon size="24"><Key /></el-icon>
+        <span v-show="!isCollapse" class="logo-text">opsx-licence</span>
+      </div>
+      <el-menu
+        :default-active="activeMenu"
+        :collapse="isCollapse"
+        :router="true"
+        background-color="#001529"
+        text-color="rgba(255,255,255,0.65)"
+        active-text-color="#fff"
+      >
+        <el-menu-item index="/dashboard">
+          <el-icon><Odometer /></el-icon>
+          <template #title>仪表板</template>
+        </el-menu-item>
+
+        <el-sub-menu index="licence">
+          <template #title>
+            <el-icon><Key /></el-icon>
+            <span>授权管理</span>
+          </template>
+          <el-menu-item index="/products">
+            <el-icon><Box /></el-icon>产品管理
+          </el-menu-item>
+          <el-menu-item index="/customers">
+            <el-icon><User /></el-icon>客户管理
+          </el-menu-item>
+          <el-menu-item index="/licenses">
+            <el-icon><Key /></el-icon>License 管理
+          </el-menu-item>
+        </el-sub-menu>
+
+        <el-sub-menu index="commerce">
+          <template #title>
+            <el-icon><ShoppingCart /></el-icon>
+            <span>定价与订单</span>
+          </template>
+          <el-menu-item index="/plans">
+            <el-icon><PriceTag /></el-icon>定价计划
+          </el-menu-item>
+          <el-menu-item index="/orders">
+            <el-icon><ShoppingCart /></el-icon>订单管理
+          </el-menu-item>
+          <el-menu-item index="/entitlements">
+            <el-icon><Medal /></el-icon>客户权益
+          </el-menu-item>
+        </el-sub-menu>
+
+        <el-sub-menu index="system">
+          <template #title>
+            <el-icon><TrendCharts /></el-icon>
+            <span>审计与设置</span>
+          </template>
+          <el-menu-item index="/logs">
+            <el-icon><Document /></el-icon>操作日志
+          </el-menu-item>
+          <el-menu-item index="/settings">
+            <el-icon><Setting /></el-icon>系统设置
+          </el-menu-item>
+        </el-sub-menu>
+      </el-menu>
+    </el-aside>
+
+    <el-container>
+      <!-- 顶栏 -->
+      <el-header class="layout-header">
+        <div class="header-left">
+          <el-icon class="collapse-btn" @click="isCollapse = !isCollapse">
+            <Fold v-if="!isCollapse" />
+            <Expand v-else />
+          </el-icon>
+        </div>
+        <div class="header-right">
+          <el-dropdown @command="handleCommand">
+            <span class="user-info">
+              <el-avatar :size="32" :icon="UserFilled" />
+              <span class="username">{{ userInfo?.username || 'admin' }}</span>
+              <el-icon><ArrowDown /></el-icon>
+            </span>
+            <template #dropdown>
+              <el-dropdown-menu>
+                <el-dropdown-item command="changePassword">修改密码</el-dropdown-item>
+                <el-dropdown-item command="logout" divided>退出登录</el-dropdown-item>
+              </el-dropdown-menu>
+            </template>
+          </el-dropdown>
+        </div>
+      </el-header>
+
+      <!-- 主内容区 -->
+      <el-main class="layout-main">
+        <router-view />
+      </el-main>
+    </el-container>
+
+    <!-- 修改密码对话框 -->
+    <el-dialog v-model="pwdDialogVisible" title="修改密码" width="420px">
+      <el-form ref="pwdFormRef" :model="pwdForm" :rules="pwdRules" label-width="80px">
+        <el-form-item label="原密码" prop="old_password">
+          <el-input v-model="pwdForm.old_password" type="password" show-password />
+        </el-form-item>
+        <el-form-item label="新密码" prop="new_password">
+          <el-input v-model="pwdForm.new_password" type="password" show-password />
+        </el-form-item>
+        <el-form-item label="确认密码" prop="confirm_password">
+          <el-input v-model="pwdForm.confirm_password" type="password" show-password />
+        </el-form-item>
+      </el-form>
+      <template #footer>
+        <el-button @click="pwdDialogVisible = false">取消</el-button>
+        <el-button type="primary" @click="submitChangePassword">确认</el-button>
+      </template>
+    </el-dialog>
+  </el-container>
+</template>
+
+<script setup>
+import { ref, reactive, computed } from 'vue'
+import { useRoute, useRouter } from 'vue-router'
+import { ElMessage, ElMessageBox } from 'element-plus'
+import { UserFilled } from '@element-plus/icons-vue'
+import { useUserStore } from '@/stores/user'
+import { changePassword } from '@/api/auth'
+
+const route = useRoute()
+const router = useRouter()
+const userStore = useUserStore()
+
+const isCollapse = ref(false)
+const userInfo = ref(userStore.userInfo)
+
+// 首次进入拉取用户信息 // Logan.Li
+if (userStore.token && !userInfo.value) {
+  userStore.fetchUserInfo().then((info) => {
+    userInfo.value = info
+  })
+}
+
+const activeMenu = computed(() => route.path)
+
+// 退出登录 / 修改密码 // Logan.Li
+async function handleCommand(command) {
+  if (command === 'logout') {
+    try {
+      await ElMessageBox.confirm('确定要退出登录吗？', '提示', { type: 'warning' })
+      userStore.logout()
+      router.push('/login')
+    } catch { /* 用户取消 */ }
+  } else if (command === 'changePassword') {
+    pwdDialogVisible.value = true
+  }
+}
+
+// 修改密码 // Logan.Li
+const pwdDialogVisible = ref(false)
+const pwdFormRef = ref(null)
+const pwdForm = reactive({ old_password: '', new_password: '', confirm_password: '' })
+const pwdRules = {
+  old_password: [{ required: true, message: '请输入原密码', trigger: 'blur' }],
+  new_password: [
+    { required: true, message: '请输入新密码', trigger: 'blur' },
+    { min: 6, message: '密码长度至少 6 位', trigger: 'blur' },
+  ],
+  confirm_password: [
+    { required: true, message: '请确认新密码', trigger: 'blur' },
+    {
+      validator: (_rule, value, callback) => {
+        if (value !== pwdForm.new_password) callback(new Error('两次输入的密码不一致'))
+        else callback()
+      },
+      trigger: 'blur',
+    },
+  ],
+}
+
+async function submitChangePassword() {
+  if (!pwdFormRef.value) return
+  await pwdFormRef.value.validate(async (valid) => {
+    if (!valid) return
+    try {
+      await changePassword({ old_password: pwdForm.old_password, new_password: pwdForm.new_password })
+      ElMessage.success('密码修改成功，请重新登录')
+      pwdDialogVisible.value = false
+      userStore.logout()
+      router.push('/login')
+    } catch { /* 拦截器已处理 */ }
+  })
+}
+</script>
+
+<style scoped>
+.layout-container { height: 100vh; }
+.layout-aside { background-color: #001529; transition: width 0.3s; overflow-x: hidden; }
+.logo { height: 60px; display: flex; align-items: center; justify-content: center; gap: 8px; color: #fff; font-size: 18px; font-weight: 600; }
+.logo-text { white-space: nowrap; }
+.layout-aside :deep(.el-menu) { border-right: none; }
+.layout-header { display: flex; align-items: center; justify-content: space-between; background-color: #fff; border-bottom: 1px solid #f0f0f0; }
+.collapse-btn { font-size: 20px; cursor: pointer; }
+.user-info { display: flex; align-items: center; gap: 8px; cursor: pointer; }
+.username { font-size: 14px; }
+.layout-main { background-color: #f5f7fa; padding: 20px; }
+</style>
diff --git a/frontend/src/main.js b/frontend/src/main.js
new file mode 100644
index 0000000..b44f288
--- /dev/null
+++ b/frontend/src/main.js
@@ -0,0 +1,26 @@
+import { createApp } from 'vue'
+import { createPinia } from 'pinia'
+import ElementPlus from 'element-plus'
+import * as ElementPlusIconsVue from '@element-plus/icons-vue'
+import 'element-plus/dist/index.css'
+
+import App from './App.vue'
+import router from './router'
+import { useUserStore } from './stores/user'
+
+const app = createApp(App)
+
+// 注册 Element Plus 图标 // Logan.Li
+for (const [key, component] of Object.entries(ElementPlusIconsVue)) {
+  app.component(key, component)
+}
+
+app.use(createPinia())
+app.use(router)
+app.use(ElementPlus, { locale: undefined }) // 默认中文
+
+// 从 localStorage 恢复登录状态 // Logan.Li
+const userStore = useUserStore()
+userStore.restore()
+
+app.mount('#app')
diff --git a/frontend/src/router/index.js b/frontend/src/router/index.js
new file mode 100644
index 0000000..ecf300c
--- /dev/null
+++ b/frontend/src/router/index.js
@@ -0,0 +1,109 @@
+import { createRouter, createWebHistory } from 'vue-router'
+import { useUserStore } from '@/stores/user'
+
+const routes = [
+  {
+    path: '/login',
+    name: 'Login',
+    component: () => import('@/views/Login.vue'),
+    meta: { public: true, title: '登录' },
+  },
+  {
+    path: '/',
+    component: () => import('@/layouts/MainLayout.vue'),
+    redirect: '/dashboard',
+    children: [
+      {
+        path: 'dashboard',
+        name: 'Dashboard',
+        component: () => import('@/views/Dashboard.vue'),
+        meta: { title: '仪表板', icon: 'Odometer' },
+      },
+      {
+        path: 'products',
+        name: 'Products',
+        component: () => import('@/views/Products.vue'),
+        meta: { title: '产品管理', icon: 'Box' },
+      },
+      {
+        path: 'customers',
+        name: 'Customers',
+        component: () => import('@/views/Customers.vue'),
+        meta: { title: '客户管理', icon: 'User' },
+      },
+      {
+        path: 'licenses',
+        name: 'Licenses',
+        component: () => import('@/views/Licenses.vue'),
+        meta: { title: 'License 管理', icon: 'Key' },
+      },
+      {
+        path: 'plans',
+        name: 'Plans',
+        component: () => import('@/views/Plans.vue'),
+        meta: { title: '定价计划', icon: 'PriceTag' },
+      },
+      {
+        path: 'orders',
+        name: 'Orders',
+        component: () => import('@/views/Orders.vue'),
+        meta: { title: '订单管理', icon: 'ShoppingCart' },
+      },
+      {
+        path: 'entitlements',
+        name: 'Entitlements',
+        component: () => import('@/views/Entitlements.vue'),
+        meta: { title: '客户权益', icon: 'Medal' },
+      },
+      {
+        path: 'logs',
+        name: 'Logs',
+        component: () => import('@/views/Logs.vue'),
+        meta: { title: '操作日志', icon: 'Document' },
+      },
+      {
+        path: 'settings',
+        name: 'Settings',
+        component: () => import('@/views/Settings.vue'),
+        meta: { title: '系统设置', icon: 'Setting' },
+      },
+    ],
+  },
+  {
+    path: '/:pathMatch(.*)*',
+    name: 'NotFound',
+    component: () => import('@/views/NotFound.vue'),
+    meta: { public: true, title: '页面不存在' },
+  },
+]
+
+const router = createRouter({
+  history: createWebHistory(),
+  routes,
+})
+
+// 全局前置守卫：未登录访问受保护页面时重定向到登录页 // Logan.Li
+router.beforeEach((to, from, next) => {
+  const userStore = useUserStore()
+
+  if (to.meta.title) {
+    document.title = `${to.meta.title} - opsx-licence`
+  }
+
+  if (to.meta.public) {
+    if (to.path === '/login' && userStore.token) {
+      next('/')
+    } else {
+      next()
+    }
+    return
+  }
+
+  if (!userStore.token) {
+    next({ path: '/login', query: { redirect: to.fullPath } })
+  } else {
+    next()
+  }
+})
+
+export default router
diff --git a/frontend/src/stores/user.js b/frontend/src/stores/user.js
new file mode 100644
index 0000000..342911c
--- /dev/null
+++ b/frontend/src/stores/user.js
@@ -0,0 +1,51 @@
+import { defineStore } from 'pinia'
+import { ref } from 'vue'
+import { login as loginApi, getMe } from '@/api/auth'
+
+const TOKEN_KEY = 'opsx_licence_token'
+
+// 用户状态 store（setup 语法） // Logan.Li
+export const useUserStore = defineStore('user', () => {
+  const token = ref('')
+  const userInfo = ref(null)
+
+  // 从 localStorage 恢复登录状态 // Logan.Li
+  function restore() {
+    const saved = localStorage.getItem(TOKEN_KEY)
+    if (saved) {
+      token.value = saved
+    }
+  }
+
+  // 登录：保存 token 并拉取用户信息 // Logan.Li
+  async function login(loginForm) {
+    const res = await loginApi(loginForm)
+    token.value = res.data.token
+    userInfo.value = res.data.user_info
+    localStorage.setItem(TOKEN_KEY, token.value)
+    return res
+  }
+
+  // 拉取当前用户信息 // Logan.Li
+  async function fetchUserInfo() {
+    const res = await getMe()
+    userInfo.value = res.data
+    return res.data
+  }
+
+  // 登出：清空状态 // Logan.Li
+  function logout() {
+    token.value = ''
+    userInfo.value = null
+    localStorage.removeItem(TOKEN_KEY)
+  }
+
+  return {
+    token,
+    userInfo,
+    restore,
+    login,
+    fetchUserInfo,
+    logout,
+  }
+})
diff --git a/frontend/src/views/Customers.vue b/frontend/src/views/Customers.vue
new file mode 100644
index 0000000..6abd7c6
--- /dev/null
+++ b/frontend/src/views/Customers.vue
@@ -0,0 +1,119 @@
+<template>
+  <div>
+    <el-card shadow="never">
+      <div class="toolbar">
+        <el-input v-model="keyword" placeholder="搜索客户/邮箱/公司" clearable style="width: 260px" @keyup.enter="loadData" @clear="loadData" />
+        <el-button type="primary" @click="openCreate">新增客户</el-button>
+      </div>
+
+      <el-table :data="list" v-loading="loading" stripe>
+        <el-table-column prop="name" label="客户名称" min-width="120" />
+        <el-table-column prop="company" label="公司" min-width="140" />
+        <el-table-column prop="email" label="邮箱" min-width="180" />
+        <el-table-column prop="phone" label="电话" width="130" />
+        <el-table-column label="状态" width="80">
+          <template #default="{ row }">
+            <el-switch :model-value="row.status === 1" @change="(v) => toggleStatus(row, v)" />
+          </template>
+        </el-table-column>
+        <el-table-column prop="created_at" label="创建时间" width="170" />
+        <el-table-column label="操作" width="140" fixed="right">
+          <template #default="{ row }">
+            <el-button size="small" @click="edit(row)">编辑</el-button>
+            <el-button size="small" type="danger" @click="remove(row)">删除</el-button>
+          </template>
+        </el-table-column>
+      </el-table>
+
+      <el-pagination
+        v-model:current-page="page" v-model:page-size="pageSize"
+        :total="total" layout="total, prev, pager, next" style="margin-top: 16px"
+        @current-change="loadData"
+      />
+    </el-card>
+
+    <el-dialog v-model="dialogVisible" :title="form.id ? '编辑客户' : '新增客户'" width="520px">
+      <el-form ref="formRef" :model="form" :rules="rules" label-width="80px">
+        <el-form-item label="名称" prop="name"><el-input v-model="form.name" /></el-form-item>
+        <el-form-item label="公司"><el-input v-model="form.company" /></el-form-item>
+        <el-form-item label="邮箱" prop="email"><el-input v-model="form.email" /></el-form-item>
+        <el-form-item label="电话"><el-input v-model="form.phone" /></el-form-item>
+        <el-form-item label="地址"><el-input v-model="form.address" /></el-form-item>
+        <el-form-item label="备注"><el-input v-model="form.notes" type="textarea" :rows="2" /></el-form-item>
+      </el-form>
+      <template #footer>
+        <el-button @click="dialogVisible = false">取消</el-button>
+        <el-button type="primary" @click="submit">确认</el-button>
+      </template>
+    </el-dialog>
+  </div>
+</template>
+
+<script setup>
+import { ref, reactive } from 'vue'
+import { ElMessageBox } from 'element-plus'
+import { getCustomers, createCustomer, updateCustomer, deleteCustomer, updateCustomerStatus } from '@/api/customer'
+
+const list = ref([])
+const loading = ref(false)
+const keyword = ref('')
+const page = ref(1)
+const pageSize = ref(10)
+const total = ref(0)
+
+const dialogVisible = ref(false)
+const formRef = ref(null)
+const form = reactive({ id: null, name: '', company: '', email: '', phone: '', address: '', notes: '' })
+const rules = {
+  name: [{ required: true, message: '请输入名称', trigger: 'blur' }],
+  email: [{ type: 'email', message: '邮箱格式不正确', trigger: 'blur' }],
+}
+
+async function loadData() {
+  loading.value = true
+  try {
+    const res = await getCustomers({ page: page.value, page_size: pageSize.value, keyword: keyword.value })
+    list.value = res.data.list || []
+    total.value = res.data.total
+  } finally { loading.value = false }
+}
+
+function openCreate() {
+  Object.assign(form, { id: null, name: '', company: '', email: '', phone: '', address: '', notes: '' })
+  dialogVisible.value = true
+}
+
+function edit(row) {
+  Object.assign(form, row)
+  dialogVisible.value = true
+}
+
+async function submit() {
+  await formRef.value.validate(async (valid) => {
+    if (!valid) return
+    try {
+      if (form.id) await updateCustomer(form.id, form)
+      else await createCustomer(form)
+      dialogVisible.value = false
+      loadData()
+    } catch { /* */ }
+  })
+}
+
+async function remove(row) {
+  await ElMessageBox.confirm(`确定删除客户「${row.name}」？`, '提示', { type: 'warning' })
+  await deleteCustomer(row.id)
+  loadData()
+}
+
+async function toggleStatus(row, val) {
+  await updateCustomerStatus(row.id, val ? 1 : 0)
+  loadData()
+}
+
+loadData()
+</script>
+
+<style scoped>
+.toolbar { display: flex; justify-content: space-between; margin-bottom: 16px; }
+</style>
diff --git a/frontend/src/views/Dashboard.vue b/frontend/src/views/Dashboard.vue
new file mode 100644
index 0000000..e9c957f
--- /dev/null
+++ b/frontend/src/views/Dashboard.vue
@@ -0,0 +1,146 @@
+<template>
+  <div class="dashboard">
+    <!-- 统计卡片 -->
+    <el-row :gutter="16">
+      <el-col :span="6" v-for="card in statCards" :key="card.title">
+        <el-card shadow="hover" class="stat-card">
+          <div class="stat-content">
+            <el-icon :size="36" :color="card.color">
+              <component :is="card.icon" />
+            </el-icon>
+            <div class="stat-info">
+              <div class="stat-title">{{ card.title }}</div>
+              <div class="stat-value">{{ card.value }}</div>
+            </div>
+          </div>
+        </el-card>
+      </el-col>
+    </el-row>
+
+    <el-row :gutter="16" style="margin-top: 16px">
+      <!-- 收入趋势 -->
+      <el-col :span="14">
+        <el-card shadow="never">
+          <template #header>近 6 个月收入趋势</template>
+          <v-chart class="chart" :option="revenueOption" autoresize />
+        </el-card>
+      </el-col>
+      <!-- 产品分布 -->
+      <el-col :span="10">
+        <el-card shadow="never">
+          <template #header>License 产品分布</template>
+          <v-chart class="chart" :option="productOption" autoresize />
+        </el-card>
+      </el-col>
+    </el-row>
+
+    <el-row :gutter="16" style="margin-top: 16px">
+      <!-- 即将到期 -->
+      <el-col :span="14">
+        <el-card shadow="never">
+          <template #header>即将到期 License（30 天内）</template>
+          <el-table :data="expiring" size="small" stripe>
+            <el-table-column prop="license_key" label="License Key" min-width="180" />
+            <el-table-column prop="customer_name" label="客户" min-width="100" />
+            <el-table-column prop="product_name" label="产品" min-width="100" />
+            <el-table-column prop="end_date" label="到期时间" width="120" />
+            <el-table-column prop="days_left" label="剩余天数" width="90">
+              <template #default="{ row }">
+                <el-tag :type="row.days_left <= 7 ? 'danger' : 'warning'" size="small">
+                  {{ row.days_left }} 天
+                </el-tag>
+              </template>
+            </el-table-column>
+          </el-table>
+        </el-card>
+      </el-col>
+      <!-- 最近活动 -->
+      <el-col :span="10">
+        <el-card shadow="never">
+          <template #header>最近操作</template>
+          <el-timeline>
+            <el-timeline-item
+              v-for="act in activities"
+              :key="act.id"
+              :timestamp="act.created_at"
+              placement="top"
+            >
+              <strong>{{ act.username }}</strong>
+              <span style="margin-left: 8px; color: #909399">{{ act.action }}</span>
+              <div style="color: #606266; font-size: 13px">{{ act.detail }}</div>
+            </el-timeline-item>
+          </el-timeline>
+        </el-card>
+      </el-col>
+    </el-row>
+  </div>
+</template>
+
+<script setup>
+import { ref, reactive, onMounted, computed } from 'vue'
+import VChart from 'vue-echarts'
+import { use } from 'echarts/core'
+import { CanvasRenderer } from 'echarts/renderers'
+import { BarChart, PieChart, LineChart } from 'echarts/charts'
+import { GridComponent, TooltipComponent, LegendComponent, TitleComponent } from 'echarts/components'
+import {
+  getDashboardStats, getExpiringLicenses, getRecentActivities,
+  getRevenueStats, getProductDistribution,
+} from '@/api/analytics'
+
+use([CanvasRenderer, BarChart, PieChart, LineChart, GridComponent, TooltipComponent, LegendComponent, TitleComponent])
+
+const stats = ref({})
+const expiring = ref([])
+const activities = ref([])
+const revenueData = ref([])
+const productData = ref([])
+
+const statCards = computed(() => [
+  { title: 'License 总数', value: stats.value.total_licenses ?? '—', icon: 'Key', color: '#409eff' },
+  { title: '活跃授权', value: stats.value.active_licenses ?? '—', icon: 'CircleCheck', color: '#67c23a' },
+  { title: '客户数', value: stats.value.total_customers ?? '—', icon: 'User', color: '#e6a23c' },
+  { title: '在线设备', value: stats.value.online_devices ?? '—', icon: 'Monitor', color: '#f56c6c' },
+])
+
+const revenueOption = computed(() => ({
+  tooltip: { trigger: 'axis' },
+  xAxis: { type: 'category', data: revenueData.value.map((d) => d.period) },
+  yAxis: { type: 'value' },
+  series: [{ data: revenueData.value.map((d) => d.amount), type: 'line', smooth: true, areaStyle: {}, color: '#409eff' }],
+}))
+
+const productOption = computed(() => ({
+  tooltip: { trigger: 'item' },
+  legend: { bottom: 0 },
+  series: [{
+    type: 'pie', radius: ['40%', '70%'],
+    data: productData.value.map((d) => ({ name: d.product_name || '未知', value: d.count })),
+  }],
+}))
+
+onMounted(async () => {
+  try {
+    const [s, e, a, r, p] = await Promise.all([
+      getDashboardStats(), getExpiringLicenses(30), getRecentActivities(8),
+      getRevenueStats(), getProductDistribution(),
+    ])
+    stats.value = s.data
+    expiring.value = e.data
+    activities.value = a.data
+    revenueData.value = r.data
+    productData.value = p.data
+  } catch {
+    // 拦截器已处理
+  }
+})
+</script>
+
+<style scoped>
+.stat-card { margin-bottom: 0; }
+.stat-content { display: flex; align-items: center; gap: 16px; }
+.stat-info { display: flex; flex-direction: column; }
+.stat-title { font-size: 13px; color: #909399; }
+.stat-value { font-size: 26px; font-weight: 600; color: #303133; }
+.chart { height: 280px; }
+</style>
diff --git a/frontend/src/views/Entitlements.vue b/frontend/src/views/Entitlements.vue
new file mode 100644
index 0000000..959ddc2
--- /dev/null
+++ b/frontend/src/views/Entitlements.vue
@@ -0,0 +1,118 @@
+<template>
+  <div>
+    <el-card shadow="never">
+      <div class="toolbar">
+        <div class="filters">
+          <el-select v-model="customerFilter" placeholder="客户" clearable filterable style="width: 180px" @change="loadData">
+            <el-option v-for="c in customers" :key="c.id" :label="c.name" :value="c.id" />
+          </el-select>
+          <el-select v-model="productFilter" placeholder="产品" clearable filterable style="width: 180px" @change="loadData">
+            <el-option v-for="p in products" :key="p.id" :label="p.name" :value="p.id" />
+          </el-select>
+        </div>
+      </div>
+
+      <el-table :data="list" v-loading="loading" stripe>
+        <el-table-column prop="customer_name" label="客户" min-width="110" />
+        <el-table-column prop="product_name" label="产品" min-width="110" />
+        <el-table-column prop="plan_name" label="计划" min-width="110" />
+        <el-table-column label="类型" width="90">
+          <template #default="{ row }">{{ planTypeLabel(row.plan_type) }}</template>
+        </el-table-column>
+        <el-table-column prop="license_key" label="License Key" min-width="200" />
+        <el-table-column label="状态" width="80">
+          <template #default="{ row }">
+            <el-tag :type="entStatusTag(row.status)" size="small">{{ entStatusLabel(row.status) }}</el-tag>
+          </template>
+        </el-table-column>
+        <el-table-column label="有效期" min-width="160">
+          <template #default="{ row }">
+            <div>{{ row.valid_from }}</div>
+            <div style="color: #909399">至 {{ row.valid_until || '永久' }}</div>
+          </template>
+        </el-table-column>
+        <el-table-column label="剩余" width="80">
+          <template #default="{ row }">
+            <span :style="{ color: row.days_left <= 7 ? '#f56c6c' : '' }">{{ row.days_left >= 9999 ? '永久' : row.days_left + '天' }}</span>
+          </template>
+        </el-table-column>
+        <el-table-column label="设备" width="80">
+          <template #default="{ row }">{{ row.current_devices }}/{{ row.max_devices }}</template>
+        </el-table-column>
+        <el-table-column label="操作" width="150" fixed="right">
+          <template #default="{ row }">
+            <el-button size="small" :disabled="!row.renewable" @click="renew(row)">续费</el-button>
+            <el-button size="small" type="danger" @click="revoke(row)">吊销</el-button>
+          </template>
+        </el-table-column>
+      </el-table>
+
+      <el-pagination
+        v-model:current-page="page" v-model:page-size="pageSize"
+        :total="total" layout="total, prev, pager, next" style="margin-top: 16px"
+        @current-change="loadData"
+      />
+    </el-card>
+  </div>
+</template>
+
+<script setup>
+import { ref, onMounted } from 'vue'
+import { ElMessage, ElMessageBox } from 'element-plus'
+import { getEntitlements, revokeEntitlement, renewEntitlement } from '@/api/entitlement'
+import { getAllProducts } from '@/api/product'
+import { getAllCustomers } from '@/api/customer'
+
+const list = ref([])
+const products = ref([])
+const customers = ref([])
+const loading = ref(false)
+const customerFilter = ref('')
+const productFilter = ref('')
+const page = ref(1)
+const pageSize = ref(10)
+const total = ref(0)
+
+function planTypeLabel(t) { return { perpetual: '买断', lifetime: '终身', monthly: '月订阅', yearly: '年订阅' }[t] || t }
+function entStatusLabel(s) { return { active: '有效', expired: '过期', revoked: '已吊销' }[s] || s }
+function entStatusTag(s) { return { active: 'success', expired: 'warning', revoked: 'danger' }[s] || '' }
+
+async function loadData() {
+  loading.value = true
+  try {
+    const res = await getEntitlements({
+      page: page.value, page_size: pageSize.value,
+      customer_id: customerFilter.value, product_id: productFilter.value,
+    })
+    list.value = res.data.list || []
+    total.value = res.data.total
+  } finally { loading.value = false }
+}
+
+async function revoke(row) {
+  await ElMessageBox.confirm(`确定吊销「${row.customer_name}」对「${row.product_name}」的权益？`, '提示', { type: 'warning' })
+  await revokeEntitlement(row.id)
+  loadData()
+}
+
+async function renew(row) {
+  await ElMessageBox.confirm('将按原计划续费，是否继续？', '续费', { type: 'info' })
+  try {
+    await renewEntitlement(row.id, row.plan_id)
+    ElMessage.success('续费成功')
+    loadData()
+  } catch { /* */ }
+}
+
+onMounted(async () => {
+  const [p, c] = await Promise.all([getAllProducts(), getAllCustomers()])
+  products.value = p.data
+  customers.value = c.data
+  loadData()
+})
+</script>
+
+<style scoped>
+.toolbar { margin-bottom: 16px; }
+.filters { display: flex; gap: 10px; }
+</style>
diff --git a/frontend/src/views/Licenses.vue b/frontend/src/views/Licenses.vue
new file mode 100644
index 0000000..1f27c80
--- /dev/null
+++ b/frontend/src/views/Licenses.vue
@@ -0,0 +1,251 @@
+<template>
+  <div>
+    <el-card shadow="never">
+      <div class="toolbar">
+        <div class="filters">
+          <el-input v-model="keyword" placeholder="搜索 License Key" clearable style="width: 220px" @keyup.enter="loadData" @clear="loadData" />
+          <el-select v-model="statusFilter" placeholder="状态" clearable style="width: 120px" @change="loadData">
+            <el-option v-for="s in statusOptions" :key="s.value" :label="s.label" :value="s.value" />
+          </el-select>
+          <el-select v-model="productFilter" placeholder="产品" clearable filterable style="width: 160px" @change="loadData">
+            <el-option v-for="p in products" :key="p.id" :label="p.name" :value="p.id" />
+          </el-select>
+        </div>
+        <div>
+          <el-button @click="exportData">导出 CSV</el-button>
+          <el-button type="primary" @click="openCreate">生成 License</el-button>
+        </div>
+      </div>
+
+      <el-table :data="list" v-loading="loading" stripe>
+        <el-table-column prop="license_key" label="License Key" min-width="220" />
+        <el-table-column prop="customer_name" label="客户" min-width="100" />
+        <el-table-column prop="product_name" label="产品" min-width="100" />
+        <el-table-column label="状态" width="90">
+          <template #default="{ row }">
+            <el-tag :type="statusTag(row.status)" size="small">{{ statusLabel(row.status) }}</el-tag>
+          </template>
+        </el-table-column>
+        <el-table-column prop="end_date" label="到期时间" width="110" />
+        <el-table-column label="剩余" width="70">
+          <template #default="{ row }">
+            <span :style="{ color: row.days_left <= 7 ? '#f56c6c' : '' }">{{ row.days_left }}天</span>
+          </template>
+        </el-table-column>
+        <el-table-column label="激活" width="80">
+          <template #default="{ row }">{{ row.current_activations }}/{{ row.max_activations }}</template>
+        </el-table-column>
+        <el-table-column label="操作" width="280" fixed="right">
+          <template #default="{ row }">
+            <el-button size="small" @click="viewDetail(row)">详情</el-button>
+            <el-button size="small" @click="renew(row)">续期</el-button>
+            <el-button size="small" type="warning" @click="toggle(row, row.status === 'suspended' ? 'active' : 'suspended')">
+              {{ row.status === 'suspended' ? '恢复' : '暂停' }}
+            </el-button>
+            <el-button size="small" type="danger" @click="revoke(row)">吊销</el-button>
+          </template>
+        </el-table-column>
+      </el-table>
+
+      <el-pagination
+        v-model:current-page="page" v-model:page-size="pageSize"
+        :total="total" layout="total, prev, pager, next" style="margin-top: 16px"
+        @current-change="loadData"
+      />
+    </el-card>
+
+    <!-- 生成 License -->
+    <el-dialog v-model="createVisible" title="生成 License" width="520px">
+      <el-form ref="formRef" :model="form" :rules="rules" label-width="100px">
+        <el-form-item label="客户" prop="customer_id">
+          <el-select v-model="form.customer_id" filterable placeholder="选择客户" style="width: 100%">
+            <el-option v-for="c in customers" :key="c.id" :label="c.name" :value="c.id" />
+          </el-select>
+        </el-form-item>
+        <el-form-item label="产品" prop="product_id">
+          <el-select v-model="form.product_id" filterable placeholder="选择产品" style="width: 100%">
+            <el-option v-for="p in products" :key="p.id" :label="p.name" :value="p.id" />
+          </el-select>
+        </el-form-item>
+        <el-form-item label="有效期" prop="duration">
+          <el-select v-model="form.duration" style="width: 100%">
+            <el-option v-for="d in durations" :key="d.value" :label="d.label" :value="d.value" />
+          </el-select>
+        </el-form-item>
+        <el-form-item label="最大激活数"><el-input-number v-model="form.max_activations" :min="1" /></el-form-item>
+        <el-form-item label="生成数量"><el-input-number v-model="form.count" :min="1" :max="100" /></el-form-item>
+        <el-form-item label="备注"><el-input v-model="form.notes" type="textarea" :rows="2" /></el-form-item>
+      </el-form>
+      <template #footer>
+        <el-button @click="createVisible = false">取消</el-button>
+        <el-button type="primary" @click="submitCreate">生成</el-button>
+      </template>
+    </el-dialog>
+
+    <!-- 详情/激活记录 -->
+    <el-dialog v-model="detailVisible" title="License 详情" width="680px">
+      <el-descriptions :column="2" border size="small" v-if="detail.license">
+        <el-descriptions-item label="License Key">{{ detail.license.license_key }}</el-descriptions-item>
+        <el-descriptions-item label="状态">{{ detail.license.status }}</el-descriptions-item>
+        <el-descriptions-item label="客户">{{ detail.license.customer_name }}</el-descriptions-item>
+        <el-descriptions-item label="产品">{{ detail.license.product_name }}</el-descriptions-item>
+        <el-descriptions-item label="到期">{{ detail.license.end_date }}</el-descriptions-item>
+        <el-descriptions-item label="剩余天数">{{ detail.license.days_left }} 天</el-descriptions-item>
+      </el-descriptions>
+      <h4 style="margin: 16px 0 8px">激活设备</h4>
+      <el-table :data="detail.activations" size="small" stripe>
+        <el-table-column prop="device_id" label="设备 ID" min-width="120" />
+        <el-table-column prop="device_name" label="设备名" min-width="120" />
+        <el-table-column prop="ip" label="IP" width="120" />
+        <el-table-column label="在线" width="70">
+          <template #default="{ row }">
+            <el-tag :type="row.is_online ? 'success' : 'info'" size="small">{{ row.is_online ? '在线' : '离线' }}</el-tag>
+          </template>
+        </el-table-column>
+        <el-table-column prop="last_seen_at" label="最后心跳" width="160" />
+        <el-table-column label="操作" width="90">
+          <template #default="{ row }">
+            <el-button size="small" type="danger" link @click="handleForceOffline(row)">下线</el-button>
+          </template>
+        </el-table-column>
+      </el-table>
+    </el-dialog>
+  </div>
+</template>
+
+<script setup>
+import { ref, reactive, onMounted } from 'vue'
+import { ElMessage, ElMessageBox } from 'element-plus'
+import {
+  getLicenses, createLicense, renewLicense, revokeLicense, suspendLicense,
+  activateLicense, getLicense, forceOffline, exportLicenses,
+} from '@/api/license'
+import { getAllProducts } from '@/api/product'
+import { getAllCustomers } from '@/api/customer'
+
+const list = ref([])
+const products = ref([])
+const customers = ref([])
+const loading = ref(false)
+const keyword = ref('')
+const statusFilter = ref('')
+const productFilter = ref('')
+const page = ref(1)
+const pageSize = ref(10)
+const total = ref(0)
+
+const statusOptions = [
+  { label: '未激活', value: 'inactive' }, { label: '已激活', value: 'active' },
+  { label: '已过期', value: 'expired' }, { label: '已吊销', value: 'revoked' }, { label: '已暂停', value: 'suspended' },
+]
+const durations = [
+  { label: '1 个月', value: 30 }, { label: '3 个月', value: 90 }, { label: '6 个月', value: 180 },
+  { label: '1 年', value: 365 }, { label: '2 年', value: 730 }, { label: '3 年', value: 1095 },
+  { label: '5 年', value: 1825 }, { label: '永久', value: 0 },
+]
+
+function statusLabel(s) { return statusOptions.find((o) => o.value === s)?.label || s }
+function statusTag(s) {
+  return { active: 'success', inactive: 'info', expired: 'warning', revoked: 'danger', suspended: 'warning' }[s] || ''
+}
+
+const createVisible = ref(false)
+const formRef = ref(null)
+const form = reactive({ customer_id: null, product_id: null, duration: 365, max_activations: 1, count: 1, notes: '' })
+const rules = {
+  customer_id: [{ required: true, message: '请选择客户' }],
+  product_id: [{ required: true, message: '请选择产品' }],
+  duration: [{ required: true, message: '请选择有效期' }],
+}
+
+const detailVisible = ref(false)
+const detail = reactive({ license: null, activations: [] })
+
+async function loadData() {
+  loading.value = true
+  try {
+    const res = await getLicenses({
+      page: page.value, page_size: pageSize.value,
+      keyword: keyword.value, status: statusFilter.value, product_id: productFilter.value,
+    })
+    list.value = res.data.list || []
+    total.value = res.data.total
+  } finally { loading.value = false }
+}
+
+function openCreate() {
+  Object.assign(form, { customer_id: null, product_id: null, duration: 365, max_activations: 1, count: 1, notes: '' })
+  createVisible.value = true
+}
+
+async function submitCreate() {
+  await formRef.value.validate(async (valid) => {
+    if (!valid) return
+    try {
+      const res = await createLicense(form)
+      ElMessage.success(`成功生成 ${res.data.length} 个 License`)
+      createVisible.value = false
+      loadData()
+    } catch { /* */ }
+  })
+}
+
+async function viewDetail(row) {
+  const res = await getLicense(row.id)
+  detail.license = res.data.license
+  detail.activations = res.data.activations || []
+  detailVisible.value = true
+}
+
+async function renew(row) {
+  const { value } = await ElMessageBox.prompt('续期天数（0=永久）', '续期', {
+    inputType: 'number', inputValue: '365', inputValidator: (v) => v !== '' && v >= 0,
+  })
+  await renewLicense(row.id, parseInt(value))
+  loadData()
+}
+
+async function revoke(row) {
+  const { value } = await ElMessageBox.prompt('吊销原因', '吊销 License', { inputType: 'textarea' })
+  await revokeLicense(row.id, value || '')
+  loadData()
+}
+
+async function toggle(row, status) {
+  if (status === 'active') await activateLicense(row.id)
+  else await suspendLicense(row.id)
+  loadData()
+}
+
+async function handleForceOffline(act) {
+  await ElMessageBox.confirm(`确定强制下线设备「${act.device_name || act.device_id}」？`, '提示', { type: 'warning' })
+  await forceOffline(detail.license.id, act.id)
+  // 刷新详情 // Logan.Li
+  const res = await getLicense(detail.license.id)
+  detail.activations = res.data.activations || []
+}
+
+async function exportData() {
+  try {
+    const res = await exportLicenses({ status: statusFilter.value, product_id: productFilter.value })
+    const url = window.URL.createObjectURL(new Blob([res]))
+    const a = document.createElement('a')
+    a.href = url
+    a.download = 'licenses.csv'
+    a.click()
+    window.URL.revokeObjectURL(url)
+  } catch { /* */ }
+}
+
+onMounted(async () => {
+  const [p, c] = await Promise.all([getAllProducts(), getAllCustomers()])
+  products.value = p.data
+  customers.value = c.data
+  loadData()
+})
+</script>
+
+<style scoped>
+.toolbar { display: flex; justify-content: space-between; margin-bottom: 16px; }
+.filters { display: flex; gap: 10px; }
+</style>
diff --git a/frontend/src/views/Login.vue b/frontend/src/views/Login.vue
new file mode 100644
index 0000000..7c3f239
--- /dev/null
+++ b/frontend/src/views/Login.vue
@@ -0,0 +1,126 @@
+<template>
+  <div class="login-container">
+    <div class="login-card">
+      <div class="login-header">
+        <el-icon size="40" color="#409eff"><Key /></el-icon>
+        <h2 class="login-title">opsx-licence</h2>
+        <p class="login-subtitle">授权管理平台</p>
+      </div>
+
+      <el-form
+        ref="loginFormRef"
+        :model="loginForm"
+        :rules="loginRules"
+        size="large"
+        @keyup.enter="handleLogin"
+      >
+        <el-form-item prop="username">
+          <el-input
+            v-model="loginForm.username"
+            placeholder="用户名"
+            :prefix-icon="User"
+          />
+        </el-form-item>
+        <el-form-item prop="password">
+          <el-input
+            v-model="loginForm.password"
+            type="password"
+            placeholder="密码"
+            show-password
+            :prefix-icon="Lock"
+          />
+        </el-form-item>
+        <el-form-item>
+          <el-button
+            type="primary"
+            :loading="loading"
+            style="width: 100%"
+            @click="handleLogin"
+          >
+            登 录
+          </el-button>
+        </el-form-item>
+      </el-form>
+
+      <div class="login-tip">默认账号：admin / admin</div>
+    </div>
+  </div>
+</template>
+
+<script setup>
+import { ref, reactive } from 'vue'
+import { useRouter, useRoute } from 'vue-router'
+import { User, Lock } from '@element-plus/icons-vue'
+import { useUserStore } from '@/stores/user'
+
+const router = useRouter()
+const route = useRoute()
+const userStore = useUserStore()
+
+const loginFormRef = ref(null)
+const loading = ref(false)
+const loginForm = reactive({
+  username: 'admin',
+  password: 'admin',
+})
+const loginRules = {
+  username: [{ required: true, message: '请输入用户名', trigger: 'blur' }],
+  password: [{ required: true, message: '请输入密码', trigger: 'blur' }],
+}
+
+// 处理登录 // Logan.Li
+async function handleLogin() {
+  if (!loginFormRef.value) return
+  await loginFormRef.value.validate(async (valid) => {
+    if (!valid) return
+    loading.value = true
+    try {
+      await userStore.login(loginForm)
+      // 登录成功后跳转到 redirect 或首页 // Logan.Li
+      const redirect = route.query.redirect || '/'
+      router.push(redirect)
+    } catch {
+      // 拦截器已处理错误提示
+    } finally {
+      loading.value = false
+    }
+  })
+}
+</script>
+
+<style scoped>
+.login-container {
+  height: 100vh;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+}
+.login-card {
+  width: 400px;
+  padding: 40px;
+  background: #fff;
+  border-radius: 8px;
+  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
+}
+.login-header {
+  text-align: center;
+  margin-bottom: 30px;
+}
+.login-title {
+  margin: 12px 0 4px;
+  font-size: 24px;
+  color: #303133;
+}
+.login-subtitle {
+  margin: 0;
+  color: #909399;
+  font-size: 14px;
+}
+.login-tip {
+  text-align: center;
+  color: #c0c4cc;
+  font-size: 12px;
+  margin-top: 16px;
+}
+</style>
diff --git a/frontend/src/views/Logs.vue b/frontend/src/views/Logs.vue
new file mode 100644
index 0000000..48557ad
--- /dev/null
+++ b/frontend/src/views/Logs.vue
@@ -0,0 +1,79 @@
+<template>
+  <div>
+    <el-card shadow="never">
+      <div class="toolbar">
+        <div class="filters">
+          <el-select v-model="actionFilter" placeholder="操作类型" clearable style="width: 150px" @change="loadData">
+            <el-option v-for="a in actions" :key="a" :label="a" :value="a" />
+          </el-select>
+          <el-select v-model="targetFilter" placeholder="目标类型" clearable style="width: 130px" @change="loadData">
+            <el-option v-for="t in targets" :key="t" :label="t" :value="t" />
+          </el-select>
+        </div>
+        <el-popconfirm title="确定清空全部日志？" @confirm="clearLogs">
+          <template #reference><el-button type="danger">清空日志</el-button></template>
+        </el-popconfirm>
+      </div>
+
+      <el-table :data="list" v-loading="loading" stripe>
+        <el-table-column prop="username" label="操作人" width="100" />
+        <el-table-column prop="action" label="操作" width="110" />
+        <el-table-column prop="target_type" label="目标类型" width="100" />
+        <el-table-column prop="target_name" label="目标名称" min-width="160" />
+        <el-table-column prop="detail" label="详情" min-width="200" show-overflow-tooltip />
+        <el-table-column label="结果" width="80">
+          <template #default="{ row }">
+            <el-tag :type="row.result === 'success' ? 'success' : 'danger'" size="small">{{ row.result }}</el-tag>
+          </template>
+        </el-table-column>
+        <el-table-column prop="ip" label="IP" width="130" />
+        <el-table-column prop="created_at" label="时间" width="170" />
+      </el-table>
+
+      <el-pagination
+        v-model:current-page="page" v-model:page-size="pageSize"
+        :total="total" layout="total, prev, pager, next" style="margin-top: 16px"
+        @current-change="loadData"
+      />
+    </el-card>
+  </div>
+</template>
+
+<script setup>
+import { ref, onMounted } from 'vue'
+import { ElMessage } from 'element-plus'
+import { getAuditLogs, clearAuditLogs } from '@/api/setting'
+
+const list = ref([])
+const loading = ref(false)
+const actionFilter = ref('')
+const targetFilter = ref('')
+const page = ref(1)
+const pageSize = ref(15)
+const total = ref(0)
+
+const actions = ['create', 'update', 'delete', 'renew', 'revoke', 'activate', 'suspend', 'force_offline', 'manual_grant', 'payment_completed', 'update_status', 'toggle_status']
+const targets = ['license', 'customer', 'product', 'plan', 'order', 'entitlement', 'activation']
+
+async function loadData() {
+  loading.value = true
+  try {
+    const res = await getAuditLogs({ page: page.value, page_size: pageSize.value, action: actionFilter.value, target_type: targetFilter.value })
+    list.value = res.data.list || []
+    total.value = res.data.total
+  } finally { loading.value = false }
+}
+
+async function clearLogs() {
+  await clearAuditLogs()
+  ElMessage.success('日志已清空')
+  loadData()
+}
+
+onMounted(loadData)
+</script>
+
+<style scoped>
+.toolbar { display: flex; justify-content: space-between; margin-bottom: 16px; }
+.filters { display: flex; gap: 10px; }
+</style>
diff --git a/frontend/src/views/NotFound.vue b/frontend/src/views/NotFound.vue
new file mode 100644
index 0000000..bce9ab5
--- /dev/null
+++ b/frontend/src/views/NotFound.vue
@@ -0,0 +1,22 @@
+<template>
+  <div class="not-found">
+    <el-result icon="warning" title="404" sub-title="抱歉，您访问的页面不存在">
+      <template #extra>
+        <el-button type="primary" @click="$router.push('/')">返回首页</el-button>
+      </template>
+    </el-result>
+  </div>
+</template>
+
+<script setup>
+// 404 页面 // Logan.Li
+</script>
+
+<style scoped>
+.not-found {
+  height: 100vh;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+</style>
diff --git a/frontend/src/views/Orders.vue b/frontend/src/views/Orders.vue
new file mode 100644
index 0000000..054d6f2
--- /dev/null
+++ b/frontend/src/views/Orders.vue
@@ -0,0 +1,130 @@
+<template>
+  <div>
+    <el-card shadow="never">
+      <div class="toolbar">
+        <div class="filters">
+          <el-select v-model="statusFilter" placeholder="订单状态" clearable style="width: 130px" @change="loadData">
+            <el-option v-for="s in statusOptions" :key="s.value" :label="s.label" :value="s.value" />
+          </el-select>
+        </div>
+        <el-button type="primary" @click="grantVisible = true">手动发放</el-button>
+      </div>
+
+      <el-table :data="list" v-loading="loading" stripe>
+        <el-table-column prop="order_no" label="订单号" min-width="200" />
+        <el-table-column prop="customer_name" label="客户" min-width="100" />
+        <el-table-column prop="product_name" label="产品" min-width="100" />
+        <el-table-column prop="plan_name" label="计划" min-width="100" />
+        <el-table-column label="金额" width="100">
+          <template #default="{ row }">{{ row.amount }} {{ row.currency }}</template>
+        </el-table-column>
+        <el-table-column label="状态" width="90">
+          <template #default="{ row }">
+            <el-tag :type="statusTag(row.status)" size="small">{{ statusLabel(row.status) }}</el-tag>
+          </template>
+        </el-table-column>
+        <el-table-column prop="payment_gateway" label="渠道" width="90" />
+        <el-table-column prop="created_at" label="创建时间" width="160" />
+      </el-table>
+
+      <el-pagination
+        v-model:current-page="page" v-model:page-size="pageSize"
+        :total="total" layout="total, prev, pager, next" style="margin-top: 16px"
+        @current-change="loadData"
+      />
+    </el-card>
+
+    <!-- 手动发放 License -->
+    <el-dialog v-model="grantVisible" title="手动发放 License" width="500px">
+      <el-form ref="grantFormRef" :model="grantForm" :rules="grantRules" label-width="90px">
+        <el-form-item label="客户邮箱" prop="customer_email"><el-input v-model="grantForm.customer_email" /></el-form-item>
+        <el-form-item label="客户姓名"><el-input v-model="grantForm.customer_name" /></el-form-item>
+        <el-form-item label="产品" prop="product_id">
+          <el-select v-model="grantForm.product_id" filterable style="width: 100%" @change="loadPlans">
+            <el-option v-for="p in products" :key="p.id" :label="p.name" :value="p.id" />
+          </el-select>
+        </el-form-item>
+        <el-form-item label="计划" prop="plan_id">
+          <el-select v-model="grantForm.plan_id" filterable style="width: 100%">
+            <el-option v-for="pl in plans" :key="pl.id" :label="pl.name" :value="pl.id" />
+          </el-select>
+        </el-form-item>
+        <el-form-item label="备注"><el-input v-model="grantForm.notes" type="textarea" :rows="2" /></el-form-item>
+      </el-form>
+      <template #footer>
+        <el-button @click="grantVisible = false">取消</el-button>
+        <el-button type="primary" @click="submitGrant">发放</el-button>
+      </template>
+    </el-dialog>
+  </div>
+</template>
+
+<script setup>
+import { ref, reactive, onMounted } from 'vue'
+import { ElMessage } from 'element-plus'
+import { getOrders, manualGrant } from '@/api/order'
+import { getAllProducts } from '@/api/product'
+import request from '@/api/request'
+
+const list = ref([])
+const products = ref([])
+const plans = ref([])
+const loading = ref(false)
+const statusFilter = ref('')
+const page = ref(1)
+const pageSize = ref(10)
+const total = ref(0)
+
+const statusOptions = [
+  { label: '待支付', value: 'pending' }, { label: '已支付', value: 'paid' },
+  { label: '失败', value: 'failed' }, { label: '已退款', value: 'refunded' }, { label: '已取消', value: 'cancelled' },
+]
+function statusLabel(s) { return statusOptions.find((o) => o.value === s)?.label || s }
+function statusTag(s) { return { paid: 'success', pending: 'warning', failed: 'danger', refunded: 'info', cancelled: 'info' }[s] || '' }
+
+const grantVisible = ref(false)
+const grantFormRef = ref(null)
+const grantForm = reactive({ customer_email: '', customer_name: '', product_id: null, plan_id: null, notes: '' })
+const grantRules = {
+  customer_email: [{ required: true, type: 'email', message: '请输入有效邮箱', trigger: 'blur' }],
+  product_id: [{ required: true, message: '请选择产品' }],
+  plan_id: [{ required: true, message: '请选择计划' }],
+}
+
+async function loadData() {
+  loading.value = true
+  try {
+    const res = await getOrders({ page: page.value, page_size: pageSize.value, status: statusFilter.value })
+    list.value = res.data.list || []
+    total.value = res.data.total
+  } finally { loading.value = false }
+}
+
+async function loadPlans(productID) {
+  grantForm.plan_id = null
+  const res = await request({ url: `/v1/products/${productID}/plans`, method: 'get' })
+  plans.value = res.data || []
+}
+
+async function submitGrant() {
+  await grantFormRef.value.validate(async (valid) => {
+    if (!valid) return
+    try {
+      const res = await manualGrant(grantForm)
+      ElMessage.success('License 发放成功：' + res.data.license_key)
+      grantVisible.value = false
+      loadData()
+    } catch { /* */ }
+  })
+}
+
+onMounted(async () => {
+  products.value = (await getAllProducts()).data
+  loadData()
+})
+</script>
+
+<style scoped>
+.toolbar { display: flex; justify-content: space-between; margin-bottom: 16px; }
+.filters { display: flex; gap: 10px; }
+</style>
diff --git a/frontend/src/views/Plans.vue b/frontend/src/views/Plans.vue
new file mode 100644
index 0000000..4a6fb97
--- /dev/null
+++ b/frontend/src/views/Plans.vue
@@ -0,0 +1,152 @@
+<template>
+  <div>
+    <el-card shadow="never">
+      <div class="toolbar">
+        <el-select v-model="productFilter" placeholder="筛选产品" clearable filterable style="width: 200px" @change="loadData" />
+        <el-button type="primary" @click="openCreate">新增计划</el-button>
+      </div>
+
+      <el-table :data="list" v-loading="loading" stripe>
+        <el-table-column prop="name" label="计划名称" min-width="130" />
+        <el-table-column label="类型" width="90">
+          <template #default="{ row }">{{ planTypeLabel(row.plan_type) }}</template>
+        </el-table-column>
+        <el-table-column label="价格" width="100">
+          <template #default="{ row }">{{ row.price }} {{ row.currency }}</template>
+        </el-table-column>
+        <el-table-column label="时长" width="90">
+          <template #default="{ row }">{{ row.duration === 0 ? '永久' : row.duration + ' 天' }}</template>
+        </el-table-column>
+        <el-table-column prop="max_devices" label="设备数" width="80" />
+        <el-table-column label="功能" min-width="160">
+          <template #default="{ row }">
+            <el-tag v-for="f in row.features" :key="f" size="small" style="margin: 2px">{{ f }}</el-tag>
+          </template>
+        </el-table-column>
+        <el-table-column label="状态" width="80">
+          <template #default="{ row }">
+            <el-switch :model-value="row.status === 1" @change="(v) => toggle(row, v)" />
+          </template>
+        </el-table-column>
+        <el-table-column label="操作" width="140" fixed="right">
+          <template #default="{ row }">
+            <el-button size="small" @click="edit(row)">编辑</el-button>
+            <el-button size="small" type="danger" @click="remove(row)">删除</el-button>
+          </template>
+        </el-table-column>
+      </el-table>
+
+      <el-pagination
+        v-model:current-page="page" v-model:page-size="pageSize"
+        :total="total" layout="total, prev, pager, next" style="margin-top: 16px"
+        @current-change="loadData"
+      />
+    </el-card>
+
+    <el-dialog v-model="dialogVisible" :title="form.id ? '编辑计划' : '新增计划'" width="540px">
+      <el-form ref="formRef" :model="form" :rules="rules" label-width="90px">
+        <el-form-item label="产品" prop="product_id">
+          <el-select v-model="form.product_id" filterable :disabled="!!form.id" style="width: 100%">
+            <el-option v-for="p in products" :key="p.id" :label="p.name" :value="p.id" />
+          </el-select>
+        </el-form-item>
+        <el-form-item label="名称" prop="name"><el-input v-model="form.name" /></el-form-item>
+        <el-form-item label="类型" prop="plan_type">
+          <el-select v-model="form.plan_type" style="width: 100%">
+            <el-option value="perpetual" label="买断" /><el-option value="lifetime" label="终身" />
+            <el-option value="monthly" label="月订阅" /><el-option value="yearly" label="年订阅" />
+          </el-select>
+        </el-form-item>
+        <el-form-item label="价格" prop="price"><el-input-number v-model="form.price" :min="0" :precision="2" /></el-form-item>
+        <el-form-item label="货币"><el-input v-model="form.currency" style="width: 100px" /></el-form-item>
+        <el-form-item label="时长(天)"><el-input-number v-model="form.duration" :min="0" /><span style="margin-left: 8px; color: #909399">0=永久</span></el-form-item>
+        <el-form-item label="设备数"><el-input-number v-model="form.max_devices" :min="1" /></el-form-item>
+        <el-form-item label="功能">
+          <el-select v-model="form.features" multiple filterable allow-create default-first-option style="width: 100%" />
+        </el-form-item>
+      </el-form>
+      <template #footer>
+        <el-button @click="dialogVisible = false">取消</el-button>
+        <el-button type="primary" @click="submit">确认</el-button>
+      </template>
+    </el-dialog>
+  </div>
+</template>
+
+<script setup>
+import { ref, reactive, onMounted } from 'vue'
+import { ElMessageBox } from 'element-plus'
+import { getPlans, createPlan, updatePlan, deletePlan, togglePlanStatus } from '@/api/plan'
+import { getAllProducts } from '@/api/product'
+
+const list = ref([])
+const products = ref([])
+const loading = ref(false)
+const productFilter = ref('')
+const page = ref(1)
+const pageSize = ref(10)
+const total = ref(0)
+
+const dialogVisible = ref(false)
+const formRef = ref(null)
+const form = reactive({ id: null, product_id: null, name: '', plan_type: 'monthly', price: 0, currency: 'USD', duration: 30, max_devices: 1, features: [] })
+const rules = {
+  product_id: [{ required: true, message: '请选择产品' }],
+  name: [{ required: true, message: '请输入名称' }],
+  plan_type: [{ required: true, message: '请选择类型' }],
+  price: [{ required: true, message: '请输入价格' }],
+}
+
+function planTypeLabel(t) { return { perpetual: '买断', lifetime: '终身', monthly: '月订阅', yearly: '年订阅' }[t] || t }
+
+async function loadData() {
+  loading.value = true
+  try {
+    const res = await getPlans({ page: page.value, page_size: pageSize.value, product_id: productFilter.value })
+    list.value = res.data.list || []
+    total.value = res.data.total
+  } finally { loading.value = false }
+}
+
+function openCreate() {
+  Object.assign(form, { id: null, product_id: null, name: '', plan_type: 'monthly', price: 0, currency: 'USD', duration: 30, max_devices: 1, features: [] })
+  dialogVisible.value = true
+}
+
+function edit(row) {
+  Object.assign(form, row, { features: row.features || [], price: row.price })
+  dialogVisible.value = true
+}
+
+async function submit() {
+  await formRef.value.validate(async (valid) => {
+    if (!valid) return
+    try {
+      if (form.id) await updatePlan(form.id, form)
+      else await createPlan(form)
+      dialogVisible.value = false
+      loadData()
+    } catch { /* */ }
+  })
+}
+
+async function remove(row) {
+  await ElMessageBox.confirm(`确定删除计划「${row.name}」？`, '提示', { type: 'warning' })
+  await deletePlan(row.id)
+  loadData()
+}
+
+async function toggle(row, val) {
+  await togglePlanStatus(row.id, val ? 1 : 0)
+  loadData()
+}
+
+onMounted(async () => {
+  products.value = (await getAllProducts()).data
+  loadData()
+})
+</script>
+
+<style scoped>
+.toolbar { display: flex; justify-content: space-between; margin-bottom: 16px; }
+</style>
diff --git a/frontend/src/views/Products.vue b/frontend/src/views/Products.vue
new file mode 100644
index 0000000..883f3be
--- /dev/null
+++ b/frontend/src/views/Products.vue
@@ -0,0 +1,134 @@
+<template>
+  <div>
+    <el-card shadow="never">
+      <div class="toolbar">
+        <el-input v-model="keyword" placeholder="搜索产品名称/编码" clearable style="width: 240px" @keyup.enter="loadData" @clear="loadData" />
+        <el-button type="primary" @click="dialogVisible = true">新增产品</el-button>
+      </div>
+
+      <el-table :data="list" v-loading="loading" stripe>
+        <el-table-column prop="name" label="产品名称" min-width="140" />
+        <el-table-column prop="code" label="编码" width="120" />
+        <el-table-column prop="version" label="版本" width="90" />
+        <el-table-column prop="price" label="价格" width="90">
+          <template #default="{ row }">{{ row.price }} {{ row.currency || '' }}</template>
+        </el-table-column>
+        <el-table-column prop="price_model" label="计费模式" width="110" />
+        <el-table-column label="功能" min-width="180">
+          <template #default="{ row }">
+            <el-tag v-for="f in row.features" :key="f" size="small" style="margin: 2px">{{ f }}</el-tag>
+          </template>
+        </el-table-column>
+        <el-table-column label="状态" width="80">
+          <template #default="{ row }">
+            <el-switch :model-value="row.status === 1" @change="(v) => toggleStatus(row, v)" />
+          </template>
+        </el-table-column>
+        <el-table-column label="操作" width="140" fixed="right">
+          <template #default="{ row }">
+            <el-button size="small" @click="edit(row)">编辑</el-button>
+            <el-button size="small" type="danger" @click="remove(row)">删除</el-button>
+          </template>
+        </el-table-column>
+      </el-table>
+
+      <el-pagination
+        v-model:current-page="page" v-model:page-size="pageSize"
+        :total="total" layout="total, prev, pager, next" style="margin-top: 16px"
+        @current-change="loadData"
+      />
+    </el-card>
+
+    <!-- 新增/编辑对话框 -->
+    <el-dialog v-model="dialogVisible" :title="form.id ? '编辑产品' : '新增产品'" width="560px">
+      <el-form ref="formRef" :model="form" :rules="rules" label-width="90px">
+        <el-form-item label="名称" prop="name"><el-input v-model="form.name" /></el-form-item>
+        <el-form-item label="编码" prop="code"><el-input v-model="form.code" :disabled="!!form.id" /></el-form-item>
+        <el-form-item label="版本"><el-input v-model="form.version" /></el-form-item>
+        <el-form-item label="价格"><el-input-number v-model="form.price" :min="0" :precision="2" /></el-form-item>
+        <el-form-item label="计费模式">
+          <el-select v-model="form.price_model" style="width: 100%">
+            <el-option value="subscription" label="订阅" /><el-option value="perpetual" label="买断" /><el-option value="trial" label="试用" />
+          </el-select>
+        </el-form-item>
+        <el-form-item label="功能特性">
+          <el-select v-model="form.features" multiple filterable allow-create default-first-option style="width: 100%" placeholder="输入后回车添加" />
+        </el-form-item>
+        <el-form-item label="描述"><el-input v-model="form.description" type="textarea" :rows="2" /></el-form-item>
+      </el-form>
+      <template #footer>
+        <el-button @click="dialogVisible = false">取消</el-button>
+        <el-button type="primary" @click="submit">确认</el-button>
+      </template>
+    </el-dialog>
+  </div>
+</template>
+
+<script setup>
+import { ref, reactive } from 'vue'
+import { ElMessage, ElMessageBox } from 'element-plus'
+import { getProducts, createProduct, updateProduct, deleteProduct, updateProductStatus } from '@/api/product'
+
+const list = ref([])
+const loading = ref(false)
+const keyword = ref('')
+const page = ref(1)
+const pageSize = ref(10)
+const total = ref(0)
+
+const dialogVisible = ref(false)
+const formRef = ref(null)
+const form = reactive({ id: null, name: '', code: '', version: '', price: 0, price_model: 'subscription', features: [], description: '' })
+const rules = {
+  name: [{ required: true, message: '请输入名称', trigger: 'blur' }],
+  code: [{ required: true, message: '请输入编码', trigger: 'blur' }],
+}
+
+async function loadData() {
+  loading.value = true
+  try {
+    const res = await getProducts({ page: page.value, page_size: pageSize.value, keyword: keyword.value })
+    list.value = res.data.list || []
+    total.value = res.data.total
+  } finally {
+    loading.value = false
+  }
+}
+
+function edit(row) {
+  Object.assign(form, row, { features: row.features || [] })
+  dialogVisible.value = true
+}
+
+async function submit() {
+  await formRef.value.validate(async (valid) => {
+    if (!valid) return
+    try {
+      if (form.id) {
+        await updateProduct(form.id, form)
+      } else {
+        await createProduct(form)
+      }
+      dialogVisible.value = false
+      loadData()
+    } catch { /* 拦截器处理 */ }
+  })
+}
+
+async function remove(row) {
+  await ElMessageBox.confirm(`确定删除产品「${row.name}」？`, '提示', { type: 'warning' })
+  await deleteProduct(row.id)
+  loadData()
+}
+
+async function toggleStatus(row, val) {
+  await updateProductStatus(row.id, val ? 1 : 0)
+  loadData()
+}
+
+loadData()
+</script>
+
+<style scoped>
+.toolbar { display: flex; justify-content: space-between; margin-bottom: 16px; }
+</style>
diff --git a/frontend/src/views/Settings.vue b/frontend/src/views/Settings.vue
new file mode 100644
index 0000000..7f128ff
--- /dev/null
+++ b/frontend/src/views/Settings.vue
@@ -0,0 +1,124 @@
+<template>
+  <div>
+    <el-row :gutter="16">
+      <!-- 系统设置 -->
+      <el-col :span="12">
+        <el-card shadow="never">
+          <template #header>系统设置</template>
+          <el-form :model="setting" label-width="130px" v-loading="loadingSetting">
+            <el-form-item label="系统名称"><el-input v-model="setting.system_name" /></el-form-item>
+            <el-form-item label="默认有效期(天)"><el-input-number v-model="setting.default_duration" :min="0" /></el-form-item>
+            <el-form-item label="默认最大激活数"><el-input-number v-model="setting.default_max_activations" :min="1" /></el-form-item>
+            <el-form-item label="到期提醒(天)"><el-input-number v-model="setting.expire_reminder_days" :min="1" /></el-form-item>
+            <el-form-item label="API 限频"><el-input-number v-model="setting.api_rate_limit" :min="0" /></el-form-item>
+            <el-form-item label="日志保留(天)"><el-input-number v-model="setting.log_retention_days" :min="0" /></el-form-item>
+            <el-form-item>
+              <el-button type="primary" @click="saveSetting">保存设置</el-button>
+            </el-form-item>
+          </el-form>
+        </el-card>
+      </el-col>
+
+      <!-- License 模板 -->
+      <el-col :span="12">
+        <el-card shadow="never">
+          <template #header>
+            <div class="card-header">
+              <span>License 模板</span>
+              <el-button size="small" type="primary" @click="openTemplate">新增模板</el-button>
+            </div>
+          </template>
+          <el-table :data="templates" size="small" stripe>
+            <el-table-column prop="name" label="名称" min-width="120" />
+            <el-table-column label="时长" width="90">
+              <template #default="{ row }">{{ row.duration === 0 ? '永久' : row.duration + '天' }}</template>
+            </el-table-column>
+            <el-table-column prop="max_activations" label="激活数" width="80" />
+            <el-table-column prop="description" label="说明" min-width="120" show-overflow-tooltip />
+            <el-table-column label="操作" width="120">
+              <template #default="{ row }">
+                <el-button size="small" link @click="editTemplate(row)">编辑</el-button>
+                <el-button size="small" link type="danger" @click="removeTemplate(row)">删除</el-button>
+              </template>
+            </el-table-column>
+          </el-table>
+        </el-card>
+      </el-col>
+    </el-row>
+
+    <!-- 模板对话框 -->
+    <el-dialog v-model="tmplVisible" :title="tmplForm.id ? '编辑模板' : '新增模板'" width="440px">
+      <el-form :model="tmplForm" label-width="90px">
+        <el-form-item label="名称"><el-input v-model="tmplForm.name" /></el-form-item>
+        <el-form-item label="时长(天)"><el-input-number v-model="tmplForm.duration" :min="0" /><span style="margin-left:8px;color:#909399">0=永久</span></el-form-item>
+        <el-form-item label="激活数"><el-input-number v-model="tmplForm.max_activations" :min="1" /></el-form-item>
+        <el-form-item label="说明"><el-input v-model="tmplForm.description" type="textarea" :rows="2" /></el-form-item>
+      </el-form>
+      <template #footer>
+        <el-button @click="tmplVisible = false">取消</el-button>
+        <el-button type="primary" @click="saveTemplate">保存</el-button>
+      </template>
+    </el-dialog>
+  </div>
+</template>
+
+<script setup>
+import { ref, reactive, onMounted } from 'vue'
+import { ElMessage, ElMessageBox } from 'element-plus'
+import { getSetting, updateSetting, getLicenseTemplates, saveLicenseTemplate, deleteLicenseTemplate } from '@/api/setting'
+
+const setting = reactive({})
+const loadingSetting = ref(false)
+const templates = ref([])
+const tmplVisible = ref(false)
+const tmplForm = reactive({ id: null, name: '', duration: 365, max_activations: 1, description: '' })
+
+async function loadSetting() {
+  loadingSetting.value = true
+  try {
+    const res = await getSetting()
+    Object.assign(setting, res.data)
+  } finally { loadingSetting.value = false }
+}
+
+async function saveSetting() {
+  await updateSetting(setting)
+  ElMessage.success('设置已保存')
+}
+
+async function loadTemplates() {
+  const res = await getLicenseTemplates()
+  templates.value = res.data || []
+}
+
+function openTemplate() {
+  Object.assign(tmplForm, { id: null, name: '', duration: 365, max_activations: 1, description: '' })
+  tmplVisible.value = true
+}
+
+function editTemplate(row) {
+  Object.assign(tmplForm, row)
+  tmplVisible.value = true
+}
+
+async function saveTemplate() {
+  await saveLicenseTemplate(tmplForm)
+  tmplVisible.value = false
+  loadTemplates()
+}
+
+async function removeTemplate(row) {
+  await ElMessageBox.confirm(`确定删除模板「${row.name}」？`, '提示', { type: 'warning' })
+  await deleteLicenseTemplate(row.id)
+  loadTemplates()
+}
+
+onMounted(() => {
+  loadSetting()
+  loadTemplates()
+})
+</script>
+
+<style scoped>
+.card-header { display: flex; justify-content: space-between; align-items: center; }
+</style>
diff --git a/frontend/vite.config.js b/frontend/vite.config.js
new file mode 100644
index 0000000..ac544d2
--- /dev/null
+++ b/frontend/vite.config.js
@@ -0,0 +1,26 @@
+import { defineConfig } from 'vite'
+import vue from '@vitejs/plugin-vue'
+import { resolve } from 'path'
+
+export default defineConfig({
+  plugins: [vue()],
+  resolve: {
+    alias: {
+      '@': resolve(__dirname, 'src'),
+    },
+  },
+  server: {
+    host: '0.0.0.0',
+    port: 5181,
+    proxy: {
+      '/api': {
+        target: 'http://localhost:9001',
+        changeOrigin: true,
+      },
+    },
+  },
+  build: {
+    outDir: 'dist',
+    target: 'esnext',
+  },
+})
diff --git a/run.sh b/run.sh
new file mode 100755
index 0000000..99fcdd2
--- /dev/null
+++ b/run.sh
@@ -0,0 +1,406 @@
+#!/bin/bash
+# opsx-licence 启动脚本
+# 一键启动前后端服务，支持日志轮转与单二进制部署
+# 用法: ./run.sh [start|stop|restart|status|frontend|backend|build|binary|help]
+
+set -e
+
+# ============================================================
+# 配置区
+# ============================================================
+PROJECT_NAME="opsx-licence"
+BACKEND_PORT=9001
+FRONTEND_PORT=5181
+BACKEND_DIR="backend"
+FRONTEND_DIR="frontend"
+BACKEND_BIN="backend"
+STANDALONE_BIN="opsx-licence"
+STANDALONE_PORT="${PORT:-9001}"
+BACKEND_LAUNCH_LABEL="com.opsx.licence.backend"
+FRONTEND_LAUNCH_LABEL="com.opsx.licence.frontend"
+
+# 日志配置
+MAX_LOG_FILES=3
+MAX_LOG_SIZE=$((50 * 1024 * 1024))  # 50MB
+
+# ============================================================
+# 通用函数
+# ============================================================
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m'
+
+info()    { echo -e "${BLUE}[INFO]${NC} $1"; }
+success() { echo -e "${GREEN}[SUCCESS]${NC} $1"; }
+warning() { echo -e "${YELLOW}[WARNING]${NC} $1"; }
+error()   { echo -e "${RED}[ERROR]${NC} $1"; }
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+cd "$SCRIPT_DIR"
+
+# PID 文件
+BACKEND_PID_FILE="$SCRIPT_DIR/$BACKEND_DIR/.backend.pid"
+FRONTEND_PID_FILE="$SCRIPT_DIR/$FRONTEND_DIR/.frontend.pid"
+STANDALONE_PID_FILE="$SCRIPT_DIR/.opsx-licence.pid"
+STANDALONE_LOG_FILE="$SCRIPT_DIR/logs/opsx-licence.log"
+
+# 检查端口是否被占用
+check_port() {
+    lsof -ti:$1 2>/dev/null | head -1
+}
+
+# 释放端口
+kill_port() {
+    local pids=$(lsof -ti:$1 2>/dev/null || echo "")
+    if [ -n "$pids" ]; then
+        info "释放端口 $1..."
+        echo "$pids" | xargs kill -9 2>/dev/null || true
+        sleep 1
+    fi
+}
+
+# 日志轮转（仅启动时调用）
+rotate_log() {
+    local log_file=$1
+    [ ! -f "$log_file" ] && return 0
+
+    local file_size=$(stat -f%z "$log_file" 2>/dev/null || stat -c%s "$log_file" 2>/dev/null || echo "0")
+    if [ "$file_size" -gt "$MAX_LOG_SIZE" ]; then
+        [ -f "${log_file}.${MAX_LOG_FILES}" ] && rm -f "${log_file}.${MAX_LOG_FILES}"
+        for i in $(seq $((MAX_LOG_FILES - 1)) -1 1); do
+            [ -f "${log_file}.${i}" ] && mv "${log_file}.${i}" "${log_file}.$((i + 1))"
+        done
+        mv "$log_file" "${log_file}.1"
+        info "日志已轮转: $log_file"
+    fi
+}
+
+# macOS 使用 launchctl 脱离当前终端，避免开发服务在脚本退出后被系统回收。 // Logan.Li
+start_detached() {
+    local label="$1"
+    local log_file="$2"
+    local command="$3"
+
+    if [ "$(uname -s)" = "Darwin" ] && command -v launchctl >/dev/null 2>&1; then
+        launchctl remove "$label" 2>/dev/null || true
+        launchctl submit -l "$label" -o "$log_file" -e "$log_file" -- /bin/sh -c "$command"
+    else
+        nohup /bin/sh -c "$command" >> "$log_file" 2>&1 < /dev/null &
+        echo $!
+    fi
+}
+
+# macOS 下卸载 launchctl 任务，其他系统沿用 PID 与端口清理。 // Logan.Li
+stop_detached() {
+    local label="$1"
+    if [ "$(uname -s)" = "Darwin" ] && command -v launchctl >/dev/null 2>&1; then
+        launchctl remove "$label" 2>/dev/null || true
+    fi
+}
+
+# ============================================================
+# 后端服务
+# ============================================================
+start_backend() {
+    info "正在启动后端服务..."
+    cd "$SCRIPT_DIR/$BACKEND_DIR"
+    mkdir -p logs
+    rotate_log "logs/server.log"
+
+    # 释放被占用的端口
+    kill_port $BACKEND_PORT
+
+    export PORT=$BACKEND_PORT
+    export GIN_MODE=debug
+
+    # 编译并运行
+    info "编译 Go 程序..."
+    go build -o "$BACKEND_BIN" .
+
+    start_detached "$BACKEND_LAUNCH_LABEL" "$SCRIPT_DIR/$BACKEND_DIR/logs/server.log" \
+        "cd \"$SCRIPT_DIR/$BACKEND_DIR\" && exec env PORT=\"$BACKEND_PORT\" GIN_MODE=\"debug\" ./\"$BACKEND_BIN\""
+
+    # 等待服务启动
+    local retries=0
+    while ! curl -s "http://localhost:$BACKEND_PORT/health" > /dev/null 2>&1; do
+        retries=$((retries + 1))
+        if [ $retries -ge 30 ]; then
+            error "后端服务启动超时，请检查日志: $BACKEND_DIR/logs/server.log"
+            return 1
+        fi
+        sleep 1
+    done
+
+    echo "$(check_port $BACKEND_PORT)" > "$BACKEND_PID_FILE"
+
+    success "后端服务已启动 (PID: $(cat "$BACKEND_PID_FILE"), 端口: $BACKEND_PORT)"
+    return 0
+}
+
+stop_backend() {
+    stop_detached "$BACKEND_LAUNCH_LABEL"
+    if [ -f "$BACKEND_PID_FILE" ]; then
+        local pid=$(cat "$BACKEND_PID_FILE" 2>/dev/null || echo "")
+        if [ -n "$pid" ] && kill -0 "$pid" 2>/dev/null; then
+            kill "$pid" 2>/dev/null || true
+            success "后端服务已停止"
+        fi
+        rm -f "$BACKEND_PID_FILE"
+    fi
+    kill_port $BACKEND_PORT
+}
+
+# ============================================================
+# 前端服务
+# ============================================================
+start_frontend() {
+    info "正在启动前端服务..."
+    cd "$SCRIPT_DIR/$FRONTEND_DIR"
+    mkdir -p logs
+    rotate_log "logs/dev.log"
+
+    kill_port $FRONTEND_PORT
+
+    if [ ! -d "node_modules" ]; then
+        warning "node_modules 不存在，正在安装依赖..."
+        npm install
+    fi
+
+    local npm_bin
+    npm_bin=$(command -v npm)
+    start_detached "$FRONTEND_LAUNCH_LABEL" "$SCRIPT_DIR/$FRONTEND_DIR/logs/dev.log" \
+        "cd \"$SCRIPT_DIR/$FRONTEND_DIR\" && exec env PATH=\"$PATH\" \"$npm_bin\" run dev"
+
+    # 等待服务启动
+    local retries=0
+    while ! curl -s "http://localhost:$FRONTEND_PORT" > /dev/null 2>&1; do
+        retries=$((retries + 1))
+        if [ $retries -ge 30 ]; then
+            error "前端服务启动超时，请检查日志: $FRONTEND_DIR/logs/dev.log"
+            return 1
+        fi
+        sleep 1
+    done
+
+    echo "$(check_port $FRONTEND_PORT)" > "$FRONTEND_PID_FILE"
+
+    success "前端服务已启动 (PID: $(cat "$FRONTEND_PID_FILE"), 端口: $FRONTEND_PORT)"
+    info "前端地址: http://localhost:$FRONTEND_PORT"
+    return 0
+}
+
+stop_frontend() {
+    stop_detached "$FRONTEND_LAUNCH_LABEL"
+    if [ -f "$FRONTEND_PID_FILE" ]; then
+        local pid=$(cat "$FRONTEND_PID_FILE" 2>/dev/null || echo "")
+        if [ -n "$pid" ] && kill -0 "$pid" 2>/dev/null; then
+            kill "$pid" 2>/dev/null || true
+            success "前端服务已停止"
+        fi
+        rm -f "$FRONTEND_PID_FILE"
+    fi
+    kill_port $FRONTEND_PORT
+}
+
+# ============================================================
+# 单二进制部署模式
+# ============================================================
+build_binary() {
+    info "构建前端生产资源..."
+    cd "$SCRIPT_DIR/$FRONTEND_DIR"
+    npm run build
+
+    info "嵌入前端资源并编译 $STANDALONE_BIN..."
+    rm -rf "$SCRIPT_DIR/$BACKEND_DIR/static"
+    mkdir -p "$SCRIPT_DIR/$BACKEND_DIR/static"
+    cp -R dist/. "$SCRIPT_DIR/$BACKEND_DIR/static/"
+
+    cd "$SCRIPT_DIR/$BACKEND_DIR"
+    CGO_ENABLED=1 go build -trimpath -ldflags="-s -w" -o "$SCRIPT_DIR/$STANDALONE_BIN" .
+    success "单二进制已生成: $SCRIPT_DIR/$STANDALONE_BIN"
+}
+
+start_binary() {
+    if [ ! -x "$SCRIPT_DIR/$STANDALONE_BIN" ]; then
+        error "未找到 $STANDALONE_BIN，请先执行 ./run.sh build"
+        return 1
+    fi
+
+    mkdir -p "$SCRIPT_DIR/logs"
+    rotate_log "$STANDALONE_LOG_FILE"
+    kill_port "$STANDALONE_PORT"
+
+    info "启动单二进制服务..."
+    PORT="$STANDALONE_PORT" GIN_MODE="${GIN_MODE:-debug}" nohup "$SCRIPT_DIR/$STANDALONE_BIN" >> "$STANDALONE_LOG_FILE" 2>&1 &
+    echo $! > "$STANDALONE_PID_FILE"
+
+    local retries=0
+    while ! curl -s "http://localhost:$STANDALONE_PORT/health" > /dev/null 2>&1; do
+        retries=$((retries + 1))
+        if [ $retries -ge 30 ]; then
+            error "单二进制启动超时，请检查日志: $STANDALONE_LOG_FILE"
+            return 1
+        fi
+        sleep 1
+    done
+    success "单二进制服务已启动: http://localhost:$STANDALONE_PORT (PID: $(cat "$STANDALONE_PID_FILE"))"
+}
+
+stop_binary() {
+    if [ -f "$STANDALONE_PID_FILE" ]; then
+        local pid=$(cat "$STANDALONE_PID_FILE" 2>/dev/null || echo "")
+        if [ -n "$pid" ] && kill -0 "$pid" 2>/dev/null; then
+            kill "$pid" 2>/dev/null || true
+        fi
+        rm -f "$STANDALONE_PID_FILE"
+    fi
+    kill_port "$STANDALONE_PORT"
+}
+
+binary_status() {
+    if [ -n "$(check_port $STANDALONE_PORT)" ]; then
+        success "单二进制服务: 运行中 (端口 $STANDALONE_PORT)"
+    else
+        warning "单二进制服务: 未运行"
+    fi
+}
+
+binary_command() {
+    case "${1:-start}" in
+        start) start_binary ;;
+        stop) stop_binary ;;
+        restart) stop_binary; sleep 1; start_binary ;;
+        status) binary_status ;;
+        upgrade) stop_binary; build_binary; start_binary ;;
+        *)
+            error "未知 binary 命令: $1"
+            echo "用法: ./run.sh binary [start|stop|restart|status|upgrade]"
+            return 1
+            ;;
+    esac
+}
+
+# ============================================================
+# 命令
+# ============================================================
+stop() {
+    info "正在停止服务..."
+    stop_backend
+    stop_frontend
+    info "所有服务已停止"
+}
+
+show_status() {
+    info "服务状态:"
+    if [ -n "$(check_port $BACKEND_PORT)" ]; then
+        success "后端服务: 运行中 (PID: $(check_port $BACKEND_PORT), 端口: $BACKEND_PORT)"
+    else
+        warning "后端服务: 未运行"
+    fi
+
+    if [ -n "$(check_port $FRONTEND_PORT)" ]; then
+        success "前端服务: 运行中 (端口: $FRONTEND_PORT)"
+    else
+        warning "前端服务: 未运行"
+    fi
+}
+
+show_help() {
+    echo "$PROJECT_NAME 启动脚本"
+    echo ""
+    echo "用法: ./run.sh [命令]"
+    echo ""
+    echo "命令:"
+    echo "  start     启动前后端服务 (默认)"
+    echo "  stop      停止前后端服务"
+    echo "  restart   重启前后端服务"
+    echo "  backend   仅启动后端服务"
+    echo "  frontend  仅启动前端服务"
+    echo "  build     构建嵌入前端的单二进制 $STANDALONE_BIN"
+    echo "  binary    管理单二进制服务（start|stop|restart|status|upgrade）"
+    echo "  status    查看服务状态"
+    echo "  help      显示帮助信息"
+    echo ""
+    echo "示例:"
+    echo "  ./run.sh              # 启动所有服务"
+    echo "  ./run.sh stop         # 停止服务"
+    echo "  ./run.sh restart      # 重启服务"
+    echo "  ./run.sh backend      # 仅启动后端"
+    echo "  ./run.sh build        # 生成 ./opsx-licence"
+    echo "  ./run.sh binary start # 启动单二进制服务"
+}
+
+# ============================================================
+# 主入口
+# ============================================================
+main() {
+    local command=${1:-start}
+
+    case "$command" in
+        start)
+            info "========== $PROJECT_NAME 启动脚本 =========="
+
+            # 检查依赖
+            if ! command -v go &> /dev/null; then
+                error "Go 未安装，请先安装 Go"
+                exit 1
+            fi
+            if ! command -v npm &> /dev/null; then
+                error "npm 未安装，请先安装 Node.js"
+                exit 1
+            fi
+
+            if start_backend && start_frontend; then
+                echo ""
+                success "========== 所有服务已启动 =========="
+                info "前端地址: http://localhost:$FRONTEND_PORT"
+                info "后端地址: http://localhost:$BACKEND_PORT"
+                info "默认账号: admin / admin"
+                echo ""
+                info "使用 './run.sh stop' 停止服务"
+            else
+                error "服务启动失败"
+                exit 1
+            fi
+            ;;
+        stop)
+            stop
+            ;;
+        restart)
+            stop
+            sleep 2
+            main start
+            ;;
+        backend)
+            info "========== $PROJECT_NAME (仅后端) =========="
+            start_backend
+            show_status
+            ;;
+        frontend)
+            info "========== $PROJECT_NAME (仅前端) =========="
+            start_frontend
+            show_status
+            ;;
+        build)
+            build_binary
+            ;;
+        binary)
+            binary_command "${2:-start}"
+            ;;
+        status)
+            show_status
+            ;;
+        help|--help|-h)
+            show_help
+            ;;
+        *)
+            error "未知命令: $command"
+            show_help
+            exit 1
+            ;;
+    esac
+}
+
+main "$@"