attempt to fix type checking

backend/src/llm/llm.py

@@ -57,7 +57,7 @@ def chat_with_file(
 
 
 class LLMFileUploadManager(ABC):
-    async def upload_files(self, files: list[LLMFile]):
+    async def upload_files(self, files: list[LLMFile]) -> list[str]:
         pass
 
     async def delete_all_files(self):

backend/src/session/llm_file_upload.py

@@ -1,11 +1,9 @@
 import json
 import logging
-from typing import TypedDict
 
 import redis
 
 from src.utils.json import try_parse_to_json
-# from .redis_session_middleware import get_session, set_session
 from src.utils import Config
 
 logger = logging.getLogger(__name__)
@@ -18,12 +16,11 @@
 
 def get_all_files() -> list[dict[str, str]]:
     session = redis_client.get(UPLOAD_SESSION_KEY)
-    return try_parse_to_json(redis_client.get(UPLOAD_SESSION_KEY)) if session else []
-
-
-class LLMFileUpload(TypedDict):
-    file_id: str
-    filename: str
+    if session and isinstance(session, str):
+        data = try_parse_to_json(session)
+        if isinstance(data, list):
+            return data
+    return []
 
 
 def get_llm_file_upload(filename: str) -> str | None:
@@ -38,5 +35,5 @@ def add_llm_file_upload(file_id: str, filename: str):
     files = get_all_files()
     if not files:
         files = []
-    files.append(LLMFileUpload(file_id=file_id, filename=filename))
+    files.append({"file_id": file_id, "filename": filename})
     redis_client.set(UPLOAD_SESSION_KEY, json.dumps(files))