Add console logging to the push subscription flow for remote diagnosis

ensurePushSubscribed() was deliberately silent on every path (success
and failure alike) — reasonable for a background enhancement, but it
made "did the subscription actually work" impossible to tell apart from
"quietly no-op'd" when diagnosing this over chat instead of in person.
Every step now logs to the console: SW registration, new vs reused
subscription, and the save-to-server result, with console.error/warn on
the specific failure points (missing permission, VAPID not configured
server-side, save request failing).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012o9j9RezxbZVKQMrB7oRLY

src/lib/push/client.ts

@@ -13,24 +13,36 @@ function urlBase64ToUint8Array(base64String: string): Uint8Array {
 
 /**
  * Registers the service worker and makes sure a push subscription exists
- * and is saved server-side. Best-effort only: quietly no-ops if push isn't
- * supported, permission isn't granted, or anything in the chain fails —
- * this is an enhancement on top of the in-page toast, never something a
- * page load should be blocked or broken by.
+ * and is saved server-side. Never throws or blocks the page on failure —
+ * this is an enhancement on top of the in-page toast — but every step logs
+ * to the console (visible in DevTools) since a silent no-op is otherwise
+ * impossible to tell apart from "it worked" when diagnosing remotely.
  */
 export async function ensurePushSubscribed(): Promise<void> {
   if (typeof window === "undefined") return;
-  if (!("serviceWorker" in navigator) || !("PushManager" in window)) return;
-  if (Notification.permission !== "granted") return;
+  if (!("serviceWorker" in navigator) || !("PushManager" in window)) {
+    console.warn("[push] not supported in this browser");
+    return;
+  }
+  if (Notification.permission !== "granted") {
+    console.warn("[push] Notification permission is", Notification.permission, "- skipping subscribe");
+    return;
+  }
 
   try {
     const registration = await navigator.serviceWorker.register("/sw.js");
     await navigator.serviceWorker.ready;
+    console.log("[push] service worker registered:", registration.scope);
 
     let subscription = await registration.pushManager.getSubscription();
-    if (!subscription) {
+    if (subscription) {
+      console.log("[push] reusing existing subscription:", subscription.endpoint);
+    } else {
       const keyRes = await fetch("/api/push/vapid-public-key");
-      if (!keyRes.ok) return; // push not configured server-side yet
+      if (!keyRes.ok) {
+        console.error("[push] /api/push/vapid-public-key returned", keyRes.status, "- is VAPID configured server-side?");
+        return;
+      }
       const { publicKey } = await keyRes.json();
       subscription = await registration.pushManager.subscribe({
         userVisibleOnly: true,
@@ -39,14 +51,20 @@ export async function ensurePushSubscribed(): Promise<void> {
         // plain (non-shared) ArrayBuffer.
         applicationServerKey: urlBase64ToUint8Array(publicKey) as BufferSource,
       });
+      console.log("[push] created new subscription:", subscription.endpoint);
     }
 
-    await fetch("/api/push/subscribe", {
+    const saveRes = await fetch("/api/push/subscribe", {
       method: "POST",
       headers: { "Content-Type": "application/json" },
       body: JSON.stringify(subscription.toJSON()),
     });
-  } catch {
-    // best-effort — a failure here must never disrupt the page
+    if (saveRes.ok) {
+      console.log("[push] subscription saved server-side — done");
+    } else {
+      console.error("[push] failed to save subscription server-side:", saveRes.status, await saveRes.text());
+    }
+  } catch (err) {
+    console.error("[push] ensurePushSubscribed failed:", err);
   }
 }