Update app.py

app.py

@@ -18,11 +18,14 @@ templates = Jinja2Templates(directory="templates")
 
 # --- Data Storage ---
 # Define the path for our temporary data storage
-TMP_DIR = Path("tmp")
+# CHANGE: Use the system's writable /tmp directory instead of a local one.
+TMP_DIR = Path("/tmp") 
 CHAT_FILE = TMP_DIR / "chat_history.json"
 
-# Ensure the tmp directory exists
-TMP_DIR.mkdir(exist_ok=True)
+# We don't need to create /tmp, the system provides it.
+# We can ensure the file exists, or let the save function create it.
+if not CHAT_FILE.exists():
+    CHAT_FILE.touch() # Create an empty file if it doesn't exist
 
 # --- Helper Functions ---
 def load_chat_history():
@@ -30,7 +33,11 @@ def load_chat_history():
     if CHAT_FILE.exists():
         with open(CHAT_FILE, "r") as f:
             try:
-                return json.load(f)
+                # Handle case where file is empty
+                content = f.read()
+                if not content:
+                    return []
+                return json.loads(content)
             except json.JSONDecodeError:
                 return []
     return []
@@ -88,4 +95,5 @@ def post_chat_message(message: str = Form(...)):
     save_chat_history(chat_history)
     
     # Redirect back to the main page to see the updated chat
-    return RedirectResponse(url="/", status_code=303)
+    return RedirectResponse(url="/", status_code=303)
+