feat: add desktop ui foundation

src/javis/ui/app.py

@@ -0,0 +1,43 @@
+"""Desktop application entry point."""
+
+from __future__ import annotations
+
+import sys
+from collections.abc import Sequence
+
+from PySide6.QtWidgets import QApplication, QMessageBox
+
+from javis.config.settings import ConfigurationError, Settings
+from javis.core.runtime import build_javis_runtime
+from javis.memory.sqlite_store import SessionStoreError
+from javis.memory.usage_store import UsageStoreError
+from javis.ui.chat_controller import DesktopController
+from javis.ui.main_window import MainWindow
+from javis.ui.workers import ApprovalBridge
+
+
+def run_gui(argv: Sequence[str] | None = None) -> int:
+    application = QApplication.instance() or QApplication(list(argv or []))
+    application.setApplicationName("Javis Desktop")
+    approval_bridge = ApprovalBridge()
+    try:
+        settings = Settings.from_env()
+        runtime = build_javis_runtime(
+            settings,
+            approval_callback=approval_bridge.request,
+            notice_callback=approval_bridge.notice_received.emit,
+        )
+    except (ConfigurationError, SessionStoreError, UsageStoreError) as exc:
+        QMessageBox.critical(None, "Javis konnte nicht starten", str(exc))
+        return 2
+    window = MainWindow(DesktopController(runtime), approval_bridge)
+    window.show()
+    return application.exec()
+
+
+def main() -> int:
+    return run_gui(sys.argv)
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())