fix(cli): generic watch-path error message and sys.argv sync for programmatic main()

src/openrtc/cli_app.py

@@ -334,8 +334,12 @@ def main(argv: list[str] | None = None) -> int:
     previous_argv = sys.argv
     try:
         if argv is not None:
+            injected_args = inject_cli_positional_paths(list(argv))
+            # Mirror a real CLI invocation so LiveKit handoff logic that
+            # inspects sys.argv sees the injected arguments (e.g. --reload).
+            sys.argv = [previous_argv[0], *injected_args]
             cli.main(
-                args=inject_cli_positional_paths(list(argv)),
+                args=injected_args,
                 prog_name="openrtc",
                 standalone_mode=True,
             )

src/openrtc/tui_app.py

@@ -17,10 +17,10 @@ def validate_metrics_watch_path(path: Path) -> None:
     resolved = path.resolve()
     if resolved.exists() and resolved.is_dir():
         raise ValueError(
-            "'--watch' must be a JSONL file path (the same path you pass to "
-            "'--metrics-jsonl' on the OpenRTC worker). This value is a directory "
-            "— for example, use a file such as ./metrics.jsonl, not your agents "
-            f"folder. Got: {resolved}"
+            "The metrics watch path must be a JSONL file path (the same path you "
+            "pass to '--metrics-jsonl' on the OpenRTC worker). This value is a "
+            "directory — for example, use a file such as ./metrics.jsonl, not your "
+            f"agents folder. Got: {resolved}"
         )