fix: Résolution import RAG et correction HTTPResponse pour les pings

main.py

@@ -1,7 +1,7 @@
 import uuid
 from fasthtml.common import *
 from starlette.staticfiles import StaticFiles
-from starlette.responses import FileResponse
+from starlette.responses import FileResponse, Response
 from starlette.middleware.base import BaseHTTPMiddleware
 
 # Imports ultra-propres depuis les modules dédiés
@@ -54,10 +54,10 @@ async def post(request, session: dict):
     return await handle_chat_request(request, session)
 
 @rt('/favicon.ico')
-def favicon_get(): return HTTPResponse(status_code=204)
+def favicon_get(): return Response(status_code=204)
 
 @rt('/favicon.ico')
-def favicon_head(): return HTTPResponse(status_code=204)
+def favicon_head(): return Response(status_code=204)
 
 @rt('/new_chat')
 def get(session): session['current_chat_id'] = str(uuid.uuid4()); return RedirectResponse('/', status_code=303)
@@ -90,7 +90,7 @@ def get(): return FileResponse(HISTORY_FILE, media_type='application/json', file
 
 @rt('/ping')
 def get():
-    return HTTPResponse(status_code=204)
+    return Response(status_code=204)
 
 if __name__ == '__main__':
     serve(port=5001)