fix: prevent duplicate console output in both TUI and non-TUI modes

- Add _ConsoleCapture detection in _stream_chain_records_console()
- Avoid duplicate writes when stdout is already wrapped by _ConsoleCapture
- Ensure console output only appears once regardless of --tui flag usage

Author: yaozhicheng

ucagent/util/log.py

@@ -70,7 +70,8 @@ def _stream_chain_records_console(stream) -> bool:
             return True
         if current.__class__.__name__ == "PersistentConsoleMirror" and hasattr(current, "_vpdb"):
             return True
-        # Do NOT check for _ConsoleCapture, as we want to sync to it
+        if current.__class__.__name__ == "_ConsoleCapture":
+            return True
         current = getattr(current, "_original", None)
     return False