fix(push): remove staff calls to non-existent subscribe-push/unsubscribe-push edge functions (500 InvalidWorkerCreation)

- staff hook called /functions/v1/subscribe-push which does not exist on the
  server (functions are named push-subscribe/push-unsubscribe and are keyed by
  phone_normalized for the CLIENT flow only; push_subscriptions has no user_id)
- keep local browser PushManager subscription; drop broken server round-trips
- client PushSubscriptionBanner flow untouched (uses correct endpoint)

src/hooks/usePushNotifications.js

@@ -1,5 +1,5 @@
 import React from "react";
-import { supabase, hasSupabaseConfig } from "../supabaseClient";
+import { hasSupabaseConfig } from "../supabaseClient";
 
 const VAPID_PUBLIC_KEY = "BBHRiMfIGQf3EjnnPQ6QS-jS2oset-YMmufJSvw-0a974ULxLaxQqZkfB0ldz-tqH6B9WAIh9Et86i0ezjuedmU";
 
@@ -32,22 +32,13 @@ export async function subscribeUserToPush(userId) {
     }
   }
 
-  const { data: { session } } = await supabase.auth.getSession();
+  // NOTE (2026-08): the server-side push_subscriptions table is keyed by
-  if (!session?.access_token) return null;
+  // phone_normalized and is used by the CLIENT flow (PushSubscriptionBanner →
-
+  // functions/v1/push-subscribe). Staff users authenticate by email and have no
-  const res = await fetch(`${supabase.supabaseUrl}/functions/v1/subscribe-push`, {
+  // phone in the session, so there is no working server endpoint for staff push
-    method: "POST",
+  // subscriptions — the old code called /functions/v1/subscribe-push which does
-    headers: {
+  // not exist (500 InvalidWorkerCreation). We keep the local browser
-      "Content-Type": "application/json",
+  // subscription only; server-side push for staff remains out of scope.
-      Authorization: `Bearer ${session.access_token}`,
-    },
-    body: JSON.stringify({ subscription: subscription.toJSON() }),
-  });
-
-  if (!res.ok) {
-    console.error("Failed to save push subscription:", await res.text());
-    return null;
-  }
 
   return subscription;
 }
@@ -59,20 +50,9 @@ export async function unsubscribeUserFromPush() {
   const subscription = await registration.pushManager.getSubscription();
   if (!subscription) return;
 
-  const endpoint = subscription.endpoint;
+  // NOTE (2026-08): no server-side unsubscribe endpoint for staff (see
+  // subscribeUserToPush above). Local browser subscription is removed only.
   await subscription.unsubscribe();
-
-  const { data: { session } } = await supabase.auth.getSession();
-  if (session?.access_token) {
-    await fetch(`${supabase.supabaseUrl}/functions/v1/unsubscribe-push`, {
-      method: "POST",
-      headers: {
-        "Content-Type": "application/json",
-        Authorization: `Bearer ${session.access_token}`,
-      },
-      body: JSON.stringify({ endpoint }),
-    });
-  }
 }
 
 export function usePushNotifications(userId) {