fix: AI loop prevention (no tools on last iteration), calendar button first, mail filter in toolbar, AI folder rename query invalidation

app/plugins/builtins/ai_assistant/services.py

@@ -451,9 +451,12 @@ async def stream_chat(
     # Agent loop: LLM → tool calls → execute → feed back → repeat
     max_iterations = 5
     for iteration in range(max_iterations):
-        # Add tools to params if available
-        if tool_schemas:
+        # Add tools to params if available, but NOT on the last iteration
+        # to force the LLM to give a final answer instead of looping
+        if tool_schemas and iteration < max_iterations - 1:
             params["tools"] = tool_schemas
+        elif "tools" in params:
+            del params["tools"]
 
         # Stream LLM response
         collected_content = ""