Add user count column to residences admin page

- Add user_count field to ResidenceResponse DTO
- Update residence handler to preload Users and calculate count
- Count includes owner (1) plus all shared users
- Add Users column to admin residences list

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

admin/src/app/(dashboard)/residences/page.tsx

@@ -57,6 +57,10 @@ const columns: ColumnDef<Residence>[] = [
     accessorKey: 'owner_name',
     header: 'Owner',
   },
+  {
+    accessorKey: 'user_count',
+    header: 'Users',
+  },
   {
     accessorKey: 'city',
     header: 'Location',

admin/src/types/models.ts

@@ -109,6 +109,7 @@ export interface Residence {
   purchase_price?: number;
   is_primary: boolean;
   is_active: boolean;
+  user_count: number;
   created_at: string;
   updated_at: string;
 }

internal/admin/dto/responses.go

@@ -98,6 +98,7 @@ type ResidenceResponse struct {
 	PurchasePrice  *float64 `json:"purchase_price,omitempty"`
 	IsPrimary      bool     `json:"is_primary"`
 	IsActive       bool     `json:"is_active"`
+	UserCount      int      `json:"user_count"`
 	CreatedAt      string   `json:"created_at"`
 	UpdatedAt      string   `json:"updated_at"`
 }

internal/admin/handlers/residence_handler.go

@@ -36,7 +36,8 @@ func (h *AdminResidenceHandler) List(c *gin.Context) {
 
 	query := h.db.Model(&models.Residence{}).
 		Preload("Owner").
-		Preload("PropertyType")
+		Preload("PropertyType").
+		Preload("Users")
 
 	// Apply search
 	if filters.Search != "" {
@@ -331,6 +332,9 @@ func (h *AdminResidenceHandler) BulkDelete(c *gin.Context) {
 }
 
 func (h *AdminResidenceHandler) toResidenceResponse(res *models.Residence) dto.ResidenceResponse {
+	// User count = owner (1) + shared users
+	userCount := 1 + len(res.Users)
+
 	response := dto.ResidenceResponse{
 		ID:             res.ID,
 		Name:           res.Name,
@@ -345,6 +349,7 @@ func (h *AdminResidenceHandler) toResidenceResponse(res *models.Residence) dto.R
 		Description:    res.Description,
 		IsPrimary:      res.IsPrimary,
 		IsActive:       res.IsActive,
+		UserCount:      userCount,
 		CreatedAt:      res.CreatedAt.Format("2006-01-02T15:04:05Z"),
 		UpdatedAt:      res.UpdatedAt.Format("2006-01-02T15:04:05Z"),
 	}