Add generic message embeds and actions to Studio

sdk/src/openagents/mods/workspace/messaging/mod.py

@@ -2258,28 +2258,26 @@ def _extract_text_from_event(self, event: Event) -> str:
             return ""
 
     def _extract_content_from_event(self, event: Event) -> Dict[str, Any]:
-        """Extract full content (text and files) from an Event object's payload.
+        """Extract message content from an Event object's payload.
 
-        This handles the nested content structure: payload.content
+        This preserves all fields in the nested payload.content mapping, such
+        as text, files, schema, embeds, actions, and custom extension fields,
+        while ensuring the returned dict always has a text key.
 
         Args:
             event: The Event object to extract content from
 
         Returns:
-            Dict with text and optionally files
+            Dict containing all payload.content fields plus a guaranteed text field
         """
         if not event or not event.payload:
             return {"text": ""}
 
         # Handle nested content structure (payload.content)
         if "content" in event.payload and isinstance(event.payload["content"], dict):
             content = event.payload["content"]
-            result = {"text": content.get("text", "")}
-
-            # Include files if present
-            if "files" in content and content["files"]:
-                result["files"] = content["files"]
-
+            result = dict(content)
+            result["text"] = result.get("text", "")
             return result
         else:
             return {"text": ""}