Admin star badge on admin avatars across the app

Show a small gold "verified admin" star in the corner opposite the red
notification dot whenever a rendered profile belongs to a bitvid admin
(the super admin or a current list editor).

- adminBadge.js (new): isAdminActor(hex|npub) sync check against
  accessControl, and applyAdminStar(container, id) which adds/removes a
  single `.admin-star` in a non-clipped, positioned container. Idempotent.
- CSS: `.admin-star` (top-left gold disc, mirrors the top-right dot),
  `.dm-avatar-wrap`, and position:relative on the comment avatar wrapper.
- Profile button: app.refreshAdminStar() lights the logged-in user's star;
  re-runs on login/logout and on accessControl.onEditorsChange (so a
  late-loading editor list still resolves).
- Comments: star on comment-author avatars (commentNodeFactory).
- Channel page: wrap the clipped avatar and star the channel owner.
- DMs: Avatar gains an opt-in adminId — only admin avatars get wrapped so
  non-admin rows are byte-identical; ContactRow passes the peer pubkey.
- tests: admin-badge unit coverage (recognition, idempotency, removal).

Co-Authored-By: Claude Opus 4.8 <[email protected]>

js/ui/components/video-modal/commentNodeFactory.js

@@ -1,6 +1,7 @@
 import { UI_FEEDBACK_DELAY_MS } from "../../../constants.js";
 import { formatAbsoluteTimestamp, formatTimeAgo } from "../../../utils/formatters.js";
 import { registerCommentAvatarFailure as registerCommentAvatarFailureUtil } from "./utils/commentAvatar.js";
+import { applyAdminStar } from "../../adminBadge.js";
 
 export class CommentNodeFactory {
   constructor({ document, window, logger, dispatch, DEFAULT_PROFILE_AVATAR }) {
@@ -45,6 +46,13 @@ export class CommentNodeFactory {
     const avatarLabel = this.document.createElement("span");
     avatarWrapper.appendChild(avatarLabel);
 
+    // Gold admin star for comments authored by a bitvid admin.
+    if (typeof event.pubkey === "string" && event.pubkey.trim()) {
+      applyAdminStar(avatarWrapper, event.pubkey.trim(), {
+        doc: this.document,
+      });
+    }
+
     const content = this.document.createElement("div");
     content.classList.add("comment-thread__content");