feat: 定时任务编辑入口全栈打通 + 修复ApprovalFlow编译错误 + 完成大文件拆分重构

- CronJobManager: 编辑按钮接通 onClick → openEdit(job)，弹出编辑对话框预填数据，
  复用新建/编辑共用 Dialog（editingId 区分模式），标题/按钮文案动态切换，
  保存时根据 editingId 调用 createJob 或 updateJob — 消除占位按钮
- ApprovalFlow: 修复 API 方法名不匹配导致 tsc -b 编译失败
  (getInstances→getProcesses, getMyApprovals→getProcesses({status:'pending'}),
   approveInstance→approveProcess, rejectInstance→rejectProcess)
  + 添加 ApprovalFlowManager 导出别名兼容 App.tsx 导入
- 合并已完成的大文件拆分重构: automation.go→automation_cron/script/playbook,
  ldap.go→ldap_ou/ldap_users, server.go→cloud_accounts/domain/platform/region,
  user.go→user_admin; 前端 Dashboard/K8s/Server/Approval/Monitor 子组件拆分
  // Logan.Li

backend/internal/api/handlers/cloud_region.go

@@ -0,0 +1,127 @@
+package handlers
+
+import (
+	"net/http"
+	"strconv"
+	"strings"
+
+	"ezops/internal/models"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+)
+
+// ==================== 区域管理（Region）====================
+
+// RegionHandler 区域处理器
+type RegionHandler struct {
+	db *gorm.DB
+}
+
+func NewRegionHandler(db *gorm.DB) *RegionHandler {
+	return &RegionHandler{db: db}
+}
+
+// regionRequest 区域创建/更新请求
+type regionRequest struct {
+	Name     string `json:"name"`
+	Code     string `json:"code"`
+	Provider string `json:"provider"`
+	Location string `json:"location"`
+	Status   string `json:"status"`
+	Endpoint string `json:"endpoint"`
+}
+
+// ListRegions 获取区域列表
+func (h *RegionHandler) ListRegions(c *gin.Context) {
+	var regions []models.Region
+	h.db.Find(&regions)
+
+	c.JSON(http.StatusOK, models.Response{
+		Code:    200,
+		Message: "success",
+		Data: models.ListResponse{
+			List:  regions,
+			Total: int64(len(regions)),
+		},
+	})
+}
+
+// CreateRegion 创建区域
+func (h *RegionHandler) CreateRegion(c *gin.Context) {
+	var req regionRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, models.Response{Code: 400, Message: "请求参数错误: " + err.Error()})
+		return
+	}
+	if strings.TrimSpace(req.Name) == "" || strings.TrimSpace(req.Code) == "" {
+		c.JSON(http.StatusBadRequest, models.Response{Code: 400, Message: "区域名称和编码不能为空"})
+		return
+	}
+
+	status := strings.TrimSpace(req.Status)
+	if status == "" {
+		status = "active"
+	}
+
+	region := models.Region{
+		Name:     strings.TrimSpace(req.Name),
+		Code:     strings.TrimSpace(req.Code),
+		Provider: strings.TrimSpace(req.Provider),
+		Location: req.Location,
+		Status:   status,
+		Endpoint: req.Endpoint,
+	}
+	if err := h.db.Create(&region).Error; err != nil {
+		c.JSON(http.StatusInternalServerError, models.Response{Code: 500, Message: "创建失败，编码可能已存在"})
+		return
+	}
+	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "创建成功", Data: region})
+}
+
+// UpdateRegion 更新区域
+func (h *RegionHandler) UpdateRegion(c *gin.Context) {
+	id, _ := strconv.Atoi(c.Param("id"))
+	var req regionRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, models.Response{Code: 400, Message: "请求参数错误: " + err.Error()})
+		return
+	}
+
+	var region models.Region
+	if err := h.db.First(&region, id).Error; err != nil {
+		c.JSON(http.StatusNotFound, models.Response{Code: 404, Message: "区域不存在"})
+		return
+	}
+
+	if strings.TrimSpace(req.Name) != "" {
+		region.Name = strings.TrimSpace(req.Name)
+	}
+	if strings.TrimSpace(req.Code) != "" {
+		region.Code = strings.TrimSpace(req.Code)
+	}
+	if strings.TrimSpace(req.Provider) != "" {
+		region.Provider = strings.TrimSpace(req.Provider)
+	}
+	region.Location = req.Location
+	if strings.TrimSpace(req.Status) != "" {
+		region.Status = strings.TrimSpace(req.Status)
+	}
+	region.Endpoint = req.Endpoint
+
+	if err := h.db.Save(&region).Error; err != nil {
+		c.JSON(http.StatusInternalServerError, models.Response{Code: 500, Message: "更新失败"})
+		return
+	}
+	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "更新成功", Data: region})
+}
+
+// DeleteRegion 删除区域
+func (h *RegionHandler) DeleteRegion(c *gin.Context) {
+	id, _ := strconv.Atoi(c.Param("id"))
+	if err := h.db.Delete(&models.Region{}, id).Error; err != nil {
+		c.JSON(http.StatusInternalServerError, models.Response{Code: 500, Message: "删除失败"})
+		return
+	}
+	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "删除成功"})
+}