feat: 服务器批量导入全栈实现 + SQL审计模型修复 + 审批流程增强

服务器批量导入:
- 后端 BatchCreateServers handler: 逐条校验/查重/GB→MB转换/错误明细
- 前端 CSV 解析器 + IP校验 + 模板下载 + 真实API导入
- 删除孤立占位组件 BatchImport.tsx

SQL审计:
- 修复 TableName 字段与 GORM 接口冲突 → TargetTable
- 补全路由注册 + AutoMigrate + 种子数据

审批流程增强 + 告警/菜单微调

// Logan.Li

backend/cmd/seed.go

@@ -55,4 +55,59 @@ func seedData(db *gorm.DB) {
 			zap.L().Info("seeded default LDAP config (8.217.205.92:389)")
 		}
 	}
+
+	// 3. 创建默认审批模板（资源申请）
+	var tplCount int64
+	db.Model(&models.ApprovalTemplate{}).Count(&tplCount)
+	if tplCount == 0 {
+		templates := []models.ApprovalTemplate{
+			{
+				Name:        "云服务器申请",
+				Code:        "server_apply",
+				Description: "申请云服务器资源（ECS/EC2），包含规格、数量、用途等信息",
+				Type:        "server_apply",
+				FormSchema: `{
+  "fields": [
+    {"key": "provider", "label": "云厂商", "type": "select", "options": ["阿里云","腾讯云","华为云","AWS"], "required": true},
+    {"key": "region", "label": "地域", "type": "text", "placeholder": "如 cn-hangzhou", "required": true},
+    {"key": "spec", "label": "规格", "type": "select", "options": ["2C4G","4C8G","8C16G","16C32G","32C64G"], "required": true},
+    {"key": "disk", "label": "系统盘(GB)", "type": "number", "default": 40, "required": true},
+    {"key": "count", "label": "数量(台)", "type": "number", "default": 1, "required": true},
+    {"key": "duration", "label": "时长", "type": "select", "options": ["1个月","3个月","6个月","1年"], "required": true},
+    {"key": "purpose", "label": "用途说明", "type": "textarea", "required": true}
+  ]
+}`,
+				FlowConfig: `[{"name":"直接主管","approver_role":"team_lead"},{"name":"运维负责人","approver_role":"ops_manager"}]`,
+				Enabled:    true,
+			},
+			{
+				Name:        "应用部署申请",
+				Code:        "app_deploy",
+				Description: "申请新应用部署，包含 Git 地址、端口、Nacos 等配置信息",
+				Type:        "app_deploy",
+				FormSchema: `{
+  "fields": [
+    {"key": "app_name", "label": "应用名称", "type": "text", "placeholder": "如 user-service", "required": true},
+    {"key": "git_url", "label": "Git 地址", "type": "text", "placeholder": "如 https://github.com/org/repo.git", "required": true},
+    {"key": "branch", "label": "分支", "type": "text", "default": "main", "required": true},
+    {"key": "language", "label": "开发语言", "type": "select", "options": ["Java","Go","Python","Node.js","C++"], "required": true},
+    {"key": "http_port", "label": "HTTP 端口", "type": "number", "placeholder": "如 8080", "required": false},
+    {"key": "grpc_port", "label": "gRPC 端口", "type": "number", "placeholder": "如 9090", "required": false},
+    {"key": "nacos_addr", "label": "Nacos 地址", "type": "text", "placeholder": "如 nacos.opsx.vip:8848", "required": true},
+    {"key": "nacos_namespace", "label": "Nacos 命名空间", "type": "text", "placeholder": "如 production", "required": false},
+    {"key": "env", "label": "部署环境", "type": "select", "options": ["dev","staging","prod"], "required": true},
+    {"key": "replicas", "label": "副本数", "type": "number", "default": 2, "required": true},
+    {"key": "remark", "label": "备注", "type": "textarea", "required": false}
+  ]
+}`,
+				FlowConfig: `[{"name":"技术负责人","approver_role":"tech_lead"},{"name":"运维负责人","approver_role":"ops_manager"}]`,
+				Enabled:    true,
+			},
+		}
+		if err := db.Create(&templates).Error; err != nil {
+			zap.L().Warn("failed to seed approval templates", zap.Error(err))
+		} else {
+			zap.L().Info("seeded default approval templates (server_apply + app_deploy)")
+		}
+	}
 }