feat: add custom query support for unresolved folder re-search

- Add SearchFolderRequest model for optional custom search query
- Update search endpoint to use custom query if provided
- Add search-again input field in UI for custom queries
- Increment search_attempts counter on re-search

src/server/api/setup_endpoints.py

@@ -224,17 +224,25 @@ async def resolve_unresolved_folder(
     )
 
 
+class SearchFolderRequest(BaseModel):
+    """Request model for searching an unresolved folder with custom query."""
+    query: Optional[str] = Field(None, description="Custom search query override")
+
+
 @router.post("/unresolved/{folder_name}/search", response_model=UnresolvedFolderResponse)
 async def search_unresolved_folder(
     folder_name: str,
+    request: Optional[SearchFolderRequest] = None,
     db=Depends(get_database_session),
 ) -> UnresolvedFolderResponse:
     """Re-search for a specific unresolved folder to get fresh suggestions.
     
-    Performs a new search using the folder's title and caches the results.
+    Performs a new search using the folder's title or a custom query.
+    Caches the results for subsequent display.
     
     Args:
         folder_name: URL-encoded folder name to search for
+        request: Optional SearchFolderRequest with custom query override
         
     Returns:
         UnresolvedFolderResponse with updated search suggestions
@@ -258,10 +266,13 @@ async def search_unresolved_folder(
             detail=f"Folder already resolved: {folder_name}"
         )
     
+    # Use custom query if provided, otherwise fall back to folder title
+    search_query = request.query if request and request.query else folder.title
+    
     # Perform search
     series_app = get_series_app()
     try:
-        results = await series_app.search(folder.title)
+        results = await series_app.search(search_query)
         search_result_json = json.dumps(results) if results else "[]"
     except Exception as e:
         logger.warning(
@@ -278,7 +289,7 @@ async def search_unresolved_folder(
         folder_name=folder.folder_name,
         title=folder.title,
         year=folder.year,
-        search_attempts=folder.search_attempts,
+        search_attempts=folder.search_attempts + 1,
         search_suggestions=results,
     )