feat: Add Complex (단지선택) filter to Carmodoo search

- Added complex_code parameter to search_cars method
- Added /api/carmodoo/complexes endpoint with list of Korean auto complexes
- Added Complex dropdown as first filter in admin Cars search
- Passes complex_code to Carmodoo API as c_danji parameter

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

backend/app/api/carmodoo.py

@@ -170,6 +170,7 @@ class CarmodooClient:
         price_max: Optional[int] = None,
         fuel: Optional[str] = None,
         transmission: Optional[str] = None,
+        complex_code: Optional[str] = None,  # 단지 코드
         page: int = 1,
         page_size: int = 50
     ) -> List[dict]:
@@ -234,6 +235,8 @@ class CarmodooClient:
                     }
                     if transmission in trans_map:
                         form_data['dGA'] = trans_map[transmission]
+                if complex_code:
+                    form_data['c_danji'] = complex_code  # 단지 코드
 
                 ajax_headers = {
                     **self.headers,
@@ -1009,6 +1012,36 @@ async def get_grades(maker_code: str, model_code: str):
     return grades
 
 
+# 카모두 단지 목록 (자동차 매매단지)
+CARMODOO_COMPLEXES = [
+    {"code": "", "name": "전체"},
+    {"code": "1", "name": "수원매매단지"},
+    {"code": "2", "name": "판교매매단지"},
+    {"code": "3", "name": "김포매매단지"},
+    {"code": "4", "name": "부산매매단지"},
+    {"code": "5", "name": "대구매매단지"},
+    {"code": "6", "name": "광주매매단지"},
+    {"code": "7", "name": "인천매매단지"},
+    {"code": "8", "name": "대전매매단지"},
+    {"code": "9", "name": "울산매매단지"},
+    {"code": "10", "name": "창원매매단지"},
+    {"code": "11", "name": "천안매매단지"},
+    {"code": "12", "name": "청주매매단지"},
+    {"code": "13", "name": "전주매매단지"},
+]
+
+
+class CarmodooComplex(BaseModel):
+    code: str
+    name: str
+
+
+@router.get("/complexes")
+def get_complexes():
+    """단지 목록 (자동차 매매단지)"""
+    return [CarmodooComplex(**c) for c in CARMODOO_COMPLEXES]
+
+
 class AdminSearchResultItem(BaseModel):
     id: str
     car_name: str
@@ -1048,6 +1081,7 @@ class AdminSearchResponse(BaseModel):
 
 @router.get("/search", response_model=AdminSearchResponse)
 async def admin_carmodoo_search(
+    complex_code: Optional[str] = None,  # 단지 코드
     maker_code: Optional[str] = None,
     model_code: Optional[str] = None,
     car_type: Optional[str] = None,
@@ -1084,6 +1118,7 @@ async def admin_carmodoo_search(
         price_min=price_min,
         price_max=price_max,
         fuel=fuel,
+        complex_code=complex_code,
         page=page,
         page_size=page_size
     )