feat(mma): Decouple UI from API calls using UserRequestEvent and AsyncEventQueue

events.py

@@ -63,3 +63,23 @@ class AsyncEventQueue:
             A tuple containing (event_name, payload).
         """
         return await self._queue.get()
+
+class UserRequestEvent:
+    """
+    Payload for a user request event.
+    """
+    def __init__(self, prompt: str, stable_md: str, file_items: List[Any], disc_text: str, base_dir: str):
+        self.prompt = prompt
+        self.stable_md = stable_md
+        self.file_items = file_items
+        self.disc_text = disc_text
+        self.base_dir = base_dir
+
+    def to_dict(self) -> Dict[str, Any]:
+        return {
+            "prompt": self.prompt,
+            "stable_md": self.stable_md,
+            "file_items": self.file_items,
+            "disc_text": self.disc_text,
+            "base_dir": self.base_dir
+        }