fix: push notifications — urlBase64ToUint8Array bug, add PushBanner prompt

src/lib/push.ts

@@ -1,9 +1,8 @@
-function urlBase64ToUint8Array(base64String: string): ArrayBuffer {
+function urlBase64ToUint8Array(base64String: string): Uint8Array {
   const padding = '='.repeat((4 - (base64String.length % 4)) % 4)
   const base64 = (base64String + padding).replace(/-/g, '+').replace(/_/g, '/')
   const rawData = window.atob(base64)
-  const arr = new Uint8Array([...rawData].map(char => char.charCodeAt(0)))
-  return arr.buffer as ArrayBuffer
+  return new Uint8Array([...rawData].map(char => char.charCodeAt(0)))
 }
 
 export async function registerSW(): Promise<ServiceWorkerRegistration | null> {
@@ -22,7 +21,7 @@ export async function subscribeToPush(vapidPublicKey: string): Promise<PushSubsc
     if (existing) return existing
     return await reg.pushManager.subscribe({
       userVisibleOnly: true,
-      applicationServerKey: urlBase64ToUint8Array(vapidPublicKey),
+      applicationServerKey: urlBase64ToUint8Array(vapidPublicKey) as unknown as ArrayBuffer,
     })
   } catch { return null }
 }