feat: Extend file search to include filenames

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

app/app.py

@@ -1264,8 +1264,12 @@ async def api_files_dirs(request: Request):
             if rel_path == '.':
                 continue
 
-            if q and q not in rel_path.lower():
-                continue
+            if q:
+                # Search in directory path and filenames
+                path_match = q in rel_path.lower()
+                file_match = any(q in fn.lower() for fn in filenames)
+                if not path_match and not file_match:
+                    continue
 
             try:
                 total_size = sum(os.path.getsize(os.path.join(dir_path, f)) for f in filenames)