fix: remove automatic TUI launch from session hooks (#1066)

TUI companion auto-launch consumed excessive memory in multi-session
(taskMaestro) environments. Remove the launch mechanism from session-start
hook, cleanup from stop hook, and delete tui_launcher module and its tests.

TUI source code (apps/mcp-server/src/tui/) is preserved for manual use.

Author: JeremyDev87

packages/claude-code-plugin/hooks/lib/tui_launcher.py

@@ -624,22 +624,6 @@ def main():
         except Exception:
             pass  # Never block session start
 
-        # Step 7: Launch companion TUI (#970)
-        try:
-            _ensure_lib_path()
-            from tui_launcher import launch as launch_tui
-            from config import get_config as _get_tui_cfg
-
-            from session_utils import get_session_id as _get_sid_tui
-            _tui_sid = _get_sid_tui()
-            _tui_cwd = os.environ.get("CLAUDE_PROJECT_DIR", str(Path.cwd()))
-            _tui_cfg = _get_tui_cfg(_tui_cwd)
-            _tui_ok, _tui_msg = launch_tui(_tui_sid, _tui_cfg)
-            if _tui_msg:
-                print(_tui_msg, file=sys.stderr)
-        except Exception:
-            pass  # Never block session start
-
         sys.exit(0)
 
     except PermissionError as e:

packages/claude-code-plugin/hooks/session-start.py

@@ -28,13 +28,6 @@ def handle_stop(data: dict):
         from session_utils import get_session_id
         session_id = get_session_id()
 
-        # Clean up companion TUI pane (#970)
-        try:
-            from tui_launcher import cleanup as cleanup_tui
-            cleanup_tui(session_id)
-        except Exception:
-            pass  # Never block session stop
-
         stats = SessionStats(session_id=session_id)
 
         # Flush pending in-memory stats before finalize (#931)