fix(push): fix VAPID key format and add regenerate endpoint + UI button

src/fabledassistant/routes/push.py

@@ -3,9 +3,9 @@ import logging
 
 from quart import Blueprint, jsonify, request
 
-from fabledassistant.auth import login_required, get_current_user_id
+from fabledassistant.auth import login_required, get_current_user_id, admin_required
 from fabledassistant.config import Config
-from fabledassistant.services.push import delete_subscription, save_subscription, vapid_enabled
+from fabledassistant.services.push import delete_subscription, regenerate_vapid_keys, save_subscription, vapid_enabled
 
 logger = logging.getLogger(__name__)
 
@@ -42,3 +42,13 @@ async def unsubscribe():
         return jsonify({"error": "endpoint is required"}), 400
     await delete_subscription(uid, endpoint)
     return "", 204
+
+
+@push_bp.route("/reset-vapid", methods=["POST"])
+@admin_required
+async def reset_vapid():
+    """Regenerate VAPID keys and clear all push subscriptions."""
+    ok = await regenerate_vapid_keys()
+    if ok:
+        return jsonify({"publicKey": Config.VAPID_PUBLIC_KEY}), 200
+    return jsonify({"error": "Key regeneration failed"}), 500