web: guard invalid VAPID key during push subscription

web/src/utils/firebasePush.ts

@@ -9,7 +9,7 @@ let foregroundListenerAttached = false;
 
 export async function ensureWebPushRegistration(): Promise<void> {
   const config = getFirebaseConfig();
-  const vapidKey = import.meta.env.VITE_FIREBASE_VAPID_KEY?.trim();
+  const vapidKey = normalizeVapidKey(import.meta.env.VITE_FIREBASE_VAPID_KEY);
   if (!config || !vapidKey) {
     return;
   }
@@ -33,10 +33,21 @@ export async function ensureWebPushRegistration(): Promise<void> {
   const registration = await navigator.serviceWorker.ready;
   const app = getApps()[0] ?? initializeApp(config);
   const messaging = getMessaging(app);
-  const token = await getToken(messaging, {
-    vapidKey,
-    serviceWorkerRegistration: registration,
-  });
+  let token: string | null = null;
+  try {
+    token = await getToken(messaging, {
+      vapidKey,
+      serviceWorkerRegistration: registration,
+    });
+  } catch (error) {
+    if (error instanceof DOMException && error.name === "InvalidAccessError") {
+      console.error(
+        "[web-push] Invalid VAPID key format. Check VITE_FIREBASE_VAPID_KEY in web env.",
+      );
+      return;
+    }
+    throw error;
+  }
   if (!token) {
     return;
   }
@@ -107,3 +118,34 @@ function getFirebaseConfig():
     appId,
   };
 }
+
+function normalizeVapidKey(raw: string | undefined): string | null {
+  if (!raw) {
+    return null;
+  }
+  let key = raw.trim();
+  if (!key) {
+    return null;
+  }
+
+  // Accept accidental JSON payloads copied from docs/panels.
+  if (key.startsWith("{") && key.endsWith("}")) {
+    try {
+      const parsed = JSON.parse(key) as { vapidKey?: string; publicKey?: string; key?: string };
+      key = (parsed.vapidKey ?? parsed.publicKey ?? parsed.key ?? "").trim();
+    } catch {
+      return null;
+    }
+  }
+
+  // Strip wrapping quotes and whitespace/newlines.
+  key = key.replace(/^['"]|['"]$/g, "").replace(/\s+/g, "");
+
+  // Convert classic base64 chars to URL-safe format expected by PushManager/Firebase.
+  key = key.replace(/\+/g, "-").replace(/\//g, "_").replace(/=+$/g, "");
+
+  if (!/^[A-Za-z0-9\-_]+$/.test(key)) {
+    return null;
+  }
+  return key.length >= 80 ? key : null;
+}