fix: update dashboard host to allow external access

main.py

@@ -729,7 +729,7 @@ def schedule_notification(interval: str, at: str, type: str) -> None:
 def start_dashboard() -> None:
     """Compatibility hook for tests and optional dashboard startup."""
     app = create_app(get_state=get_state, get_next_event=get_next_event)
-    app.run(host="127.0.0.1", port=8080, debug=False, use_reloader=False)
+    app.run(host="0.0.0.0", port=8080, debug=False, use_reloader=False)
 
 
 def main() -> None: