feat: LokiDeploy 初始提交 - 轻量级 K8s Loki 部署平台

Go(Gin) + React(Vite + shadcn/ui + Tailwind) 前后端分离，全中文 UI

- 集群管理：Kubeconfig / Token 双接入，kubectl + helm 部署
- 主机管理：SSH 密钥 / 密码双认证，CPU/内存/磁盘使用率监控，SSH 错误中文友好提示
- 存储配置、部署管理、系统设置
- Docker 镜像内置 kubectl + helm，开箱即用
- run.sh 一键启停（start/stop/restart/status）

Co-Authored-By: Claude <noreply@anthropic.com>

backend/controllers/auth.go

@@ -0,0 +1,94 @@
+package controllers
+
+import (
+	"lokideploy/models"
+	"lokideploy/services"
+	"lokideploy/utils"
+
+	"github.com/gin-gonic/gin"
+)
+
+type AuthController struct {
+	service *services.AuthService
+}
+
+func NewAuthController() *AuthController {
+	return &AuthController{service: services.NewAuthService()}
+}
+
+type LoginRequest struct {
+	Username string `json:"username" binding:"required"`
+	Password string `json:"password" binding:"required"`
+}
+
+type RegisterRequest struct {
+	Username string `json:"username" binding:"required"`
+	Password string `json:"password" binding:"required,min=6"`
+	Nickname string `json:"nickname"`
+	Role     string `json:"role"`
+}
+
+type ChangePasswordRequest struct {
+	OldPassword string `json:"oldPassword" binding:"required"`
+	NewPassword string `json:"newPassword" binding:"required,min=6"`
+}
+
+func (ctrl *AuthController) Login(c *gin.Context) {
+	var req LoginRequest
+	if !utils.BindAndValidate(c, &req) {
+		return
+	}
+	user, token, err := ctrl.service.Login(req.Username, req.Password)
+	if err != nil {
+		utils.Unauthorized(c, "用户名或密码错误")
+		return
+	}
+	utils.Success(c, gin.H{"token": token, "user": models.SanitizedJSON(user)})
+}
+
+func (ctrl *AuthController) Register(c *gin.Context) {
+	var req RegisterRequest
+	if !utils.BindAndValidate(c, &req) {
+		return
+	}
+	if req.Role == "" {
+		req.Role = "user"
+	}
+	user, err := ctrl.service.Register(req.Username, req.Password, req.Nickname, req.Role)
+	if err != nil {
+		utils.Error(c, 400, err.Error())
+		return
+	}
+	utils.Success(c, models.SanitizedJSON(user))
+}
+
+func (ctrl *AuthController) GetUser(c *gin.Context) {
+	claims, ok := utils.GetUserFromContext(c)
+	if !ok {
+		utils.Unauthorized(c, "")
+		return
+	}
+	user, err := ctrl.service.GetUserByID(claims.UserID)
+	if err != nil {
+		utils.Error(c, 404, "用户不存在")
+		return
+	}
+	utils.Success(c, models.SanitizedJSON(user))
+}
+
+func (ctrl *AuthController) ChangePassword(c *gin.Context) {
+	var req ChangePasswordRequest
+	if !utils.BindAndValidate(c, &req) {
+		return
+	}
+	claims, ok := utils.GetUserFromContext(c)
+	if !ok {
+		utils.Unauthorized(c, "")
+		return
+	}
+	if err := ctrl.service.ChangePassword(claims.UserID, req.OldPassword, req.NewPassword); err != nil {
+		utils.Error(c, 400, err.Error())
+		return
+	}
+	utils.Success(c, gin.H{"message": "password changed"})
+}