Fix Qt worker lifecycle crash

src/javis/ui/app.py

@@ -10,6 +10,7 @@ from PySide6.QtCore import QTimer
 from PySide6.QtWidgets import QApplication, QMessageBox
 
 from javis.config.settings import ConfigurationError, Settings
+from javis.core.provider_router import ApprovalChoice
 from javis.core.runtime import build_javis_runtime
 from javis.memory.sqlite_store import SessionStoreError
 from javis.memory.usage_store import UsageStoreError
@@ -26,7 +27,7 @@ def run_gui(argv: Sequence[str] | None = None) -> int:
         settings = Settings.from_env()
         runtime = build_javis_runtime(
             settings,
-            approval_callback=approval_bridge.request,
+            approval_callback=lambda _decision: ApprovalChoice.CANCEL,
             notice_callback=approval_bridge.notice_received.emit,
         )
     except (ConfigurationError, SessionStoreError, UsageStoreError) as exc: