R9 Web Push in decePub: one subscription per persona, each with its own token and registration

Settings gets "Notifications on this device" (PushEditor): personas, alerts in four groups, policy, a test
notification, after a one-time notice of what the push service learns. Each persona ticked gets its own service
worker registration (push-worker.js at push/{slot}/), so its own endpoint and keys, subscribed with its own token
(IHttpService's *As); nothing PrivaPub stores ties two personas together and the worker never reads the payload's
token. PushService follows the tokens (re-subscribing after a renewal), reconciles at every session start, turns
off before sign-out and drops deleted or suspended personas. A click opens that persona's notifications; the app
badge counts the unread ones. Exchanges now ask for the push scope.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WpVCoDeM1qUTRp4fXQdfof

Models/PublicActionNotices.cs

@@ -2,7 +2,8 @@ namespace decePubClient.Models;
 
 /// <summary>
 /// The personas already told that an act of theirs is public (owner decision, PrivaPub's ROADMAP: each persona is told
-/// once, before its first one): reactions and poll votes, and joining an event. Kept in localStorage under its type name.
+/// once, before its first one): reactions and poll votes, and joining an event; and whether this device was told, before
+/// its first Web Push subscription, what the browser's push service learns. Kept in localStorage under its type name.
 /// </summary>
 public class PublicActionNotices
 {
@@ -10,10 +11,14 @@ public class PublicActionNotices
 	public List<string> PersonaIds { get; set; } = [];
 	/// <summary>Told about joining events.</summary>
 	public List<string> EventPersonaIds { get; set; } = [];
+	/// <summary>This device was told about Web Push (once for the device, whichever personas it subscribes).</summary>
+	public bool PushTold { get; set; }
 }
 
 public enum PublicAct
 {
 	Reaction = 0,
-	Participation = 1
+	Participation = 1,
+	/// <summary>Notifications on this device go through the browser's push service, which learns when they arrive.</summary>
+	Push = 2
 }