feat(시공사): 2.1 현장관리 - Backend API 확장

- 마이그레이션: site_code, client_id, status 컬럼 추가
- Site 모델: 상태 상수, Client 관계 추가
- SiteService: stats(), bulkDestroy(), 필터 확장
- SiteController: stats, bulkDestroy 엔드포인트 추가
- 라우트: /stats, /bulk 추가

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

app/Services/SiteService.php

@@ -16,6 +16,7 @@ public function index(array $params): LengthAwarePaginator
         $tenantId = $this->tenantId();
 
         $query = Site::query()
+            ->with('client:id,name')
             ->where('tenant_id', $tenantId);
 
         // 검색 필터
@@ -23,6 +24,7 @@ public function index(array $params): LengthAwarePaginator
             $search = $params['search'];
             $query->where(function ($q) use ($search) {
                 $q->where('name', 'like', "%{$search}%")
+                    ->orWhere('site_code', 'like', "%{$search}%")
                     ->orWhere('address', 'like', "%{$search}%");
             });
         }
@@ -32,6 +34,24 @@ public function index(array $params): LengthAwarePaginator
             $query->where('is_active', $params['is_active']);
         }
 
+        // 상태 필터
+        if (! empty($params['status'])) {
+            $query->where('status', $params['status']);
+        }
+
+        // 거래처 필터
+        if (! empty($params['client_id'])) {
+            $query->where('client_id', $params['client_id']);
+        }
+
+        // 날짜 필터
+        if (! empty($params['start_date'])) {
+            $query->whereDate('created_at', '>=', $params['start_date']);
+        }
+        if (! empty($params['end_date'])) {
+            $query->whereDate('created_at', '<=', $params['end_date']);
+        }
+
         // 정렬
         $sortBy = $params['sort_by'] ?? 'created_at';
         $sortDir = $params['sort_dir'] ?? 'desc';
@@ -43,6 +63,30 @@ public function index(array $params): LengthAwarePaginator
         return $query->paginate($perPage);
     }
 
+    /**
+     * 현장 통계 조회
+     */
+    public function stats(): array
+    {
+        $tenantId = $this->tenantId();
+
+        $total = Site::where('tenant_id', $tenantId)->count();
+
+        $statusCounts = Site::where('tenant_id', $tenantId)
+            ->selectRaw('status, COUNT(*) as count')
+            ->groupBy('status')
+            ->pluck('count', 'status')
+            ->toArray();
+
+        return [
+            'total' => $total,
+            'construction' => $statusCounts[Site::STATUS_ACTIVE] ?? 0,
+            'unregistered' => $statusCounts[Site::STATUS_UNREGISTERED] ?? 0,
+            'suspended' => $statusCounts[Site::STATUS_SUSPENDED] ?? 0,
+            'pending' => $statusCounts[Site::STATUS_PENDING] ?? 0,
+        ];
+    }
+
     /**
      * 현장 상세 조회
      */
@@ -51,6 +95,7 @@ public function show(int $id): Site
         $tenantId = $this->tenantId();
 
         return Site::query()
+            ->with('client:id,name')
             ->where('tenant_id', $tenantId)
             ->findOrFail($id);
     }
@@ -66,16 +111,19 @@ public function store(array $data): Site
         return DB::transaction(function () use ($data, $tenantId, $userId) {
             $site = Site::create([
                 'tenant_id' => $tenantId,
+                'site_code' => $data['site_code'] ?? null,
+                'client_id' => $data['client_id'] ?? null,
                 'name' => $data['name'],
                 'address' => $data['address'] ?? null,
                 'latitude' => $data['latitude'] ?? null,
                 'longitude' => $data['longitude'] ?? null,
                 'is_active' => $data['is_active'] ?? true,
+                'status' => $data['status'] ?? Site::STATUS_UNREGISTERED,
                 'created_by' => $userId,
                 'updated_by' => $userId,
             ]);
 
-            return $site;
+            return $site->load('client:id,name');
         });
     }
 
@@ -93,17 +141,20 @@ public function update(int $id, array $data): Site
                 ->findOrFail($id);
 
             $site->fill([
+                'site_code' => $data['site_code'] ?? $site->site_code,
+                'client_id' => array_key_exists('client_id', $data) ? $data['client_id'] : $site->client_id,
                 'name' => $data['name'] ?? $site->name,
                 'address' => $data['address'] ?? $site->address,
                 'latitude' => $data['latitude'] ?? $site->latitude,
                 'longitude' => $data['longitude'] ?? $site->longitude,
                 'is_active' => $data['is_active'] ?? $site->is_active,
+                'status' => $data['status'] ?? $site->status,
                 'updated_by' => $userId,
             ]);
 
             $site->save();
 
-            return $site->fresh();
+            return $site->fresh()->load('client:id,name');
         });
     }
 
@@ -128,6 +179,32 @@ public function destroy(int $id): bool
         });
     }
 
+    /**
+     * 현장 일괄 삭제
+     */
+    public function bulkDestroy(array $ids): int
+    {
+        $tenantId = $this->tenantId();
+        $userId = $this->apiUserId();
+
+        return DB::transaction(function () use ($ids, $tenantId, $userId) {
+            $sites = Site::query()
+                ->where('tenant_id', $tenantId)
+                ->whereIn('id', $ids)
+                ->get();
+
+            $deletedCount = 0;
+            foreach ($sites as $site) {
+                $site->deleted_by = $userId;
+                $site->save();
+                $site->delete();
+                $deletedCount++;
+            }
+
+            return $deletedCount;
+        });
+    }
+
     /**
      * 활성화된 현장 목록 조회 (셀렉트박스용)
      */
@@ -139,7 +216,7 @@ public function getActiveSites(): array
             ->where('tenant_id', $tenantId)
             ->where('is_active', true)
             ->orderBy('name')
-            ->get(['id', 'name', 'address'])
+            ->get(['id', 'site_code', 'name', 'address'])
             ->toArray();
     }
 }