feat:전자세금계산서 공급받는자 거래처 검색 모달 추가

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/Http/Controllers/Barobill/BarobillController.php

@@ -4,7 +4,9 @@
 
 use App\Http\Controllers\Controller;
 use App\Models\Barobill\BarobillMember;
+use App\Models\Finance\TradingPartner;
 use App\Models\Tenants\Tenant;
+use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
 use Illuminate\Http\Response;
 use Illuminate\View\View;
@@ -141,6 +143,31 @@ public function usage(Request $request): View|Response
         return view('barobill.usage.index', compact('currentTenant', 'barobillMember', 'isHeadquarters'));
     }
 
+    /**
+     * 거래처 검색 (전자세금계산서 공급받는자 검색용)
+     */
+    public function searchTradingPartners(Request $request): JsonResponse
+    {
+        $tenantId = session('selected_tenant_id', 1);
+        $keyword = $request->input('keyword', '');
+
+        $query = TradingPartner::forTenant($tenantId)->active();
+
+        if ($keyword) {
+            $query->where(function ($q) use ($keyword) {
+                $q->where('name', 'like', "%{$keyword}%")
+                  ->orWhere('biz_no', 'like', "%{$keyword}%")
+                  ->orWhere('manager', 'like', "%{$keyword}%");
+            });
+        }
+
+        $partners = $query->orderBy('name')
+            ->limit(50)
+            ->get(['id', 'name', 'biz_no', 'contact', 'email', 'manager', 'manager_phone']);
+
+        return response()->json($partners);
+    }
+
     /**
      * 과금관리 페이지 (본사 전용)
      */