fix: terminal clear on reset and data loss for text starting with {

Frontend:
- Clear xterm.js screen when receiving 'connected' status after reset
- Send resize message after clearing to ensure proper dimensions
- Fixes terminal artifacts after reset

Backend:
- Fix data loss bug: text starting with '{' but not valid JSON was silently dropped
- Now writes such text to session as regular input
- Fixes missing characters when user types '{'

apps/api/src/api/terminal.py

@@ -192,7 +192,8 @@ async def _write_loop(session_ref: SessionRef, websocket, instance_id: str) -> N
                                 continue
                                 
                         except json.JSONDecodeError:
-                            pass
+                            # Not a valid JSON control message, treat as regular input
+                            await session.write_input(text.encode("utf-8"))
                     else:
                         await session.write_input(text.encode("utf-8"))
             elif message["type"] == "websocket.disconnect":