🧹 Centralize SimpleEventEmitter and fix channelProfile iterable error

- Extract duplicated SimpleEventEmitter class into shared utility `js/utils/eventEmitter.js`.
- Refactor AuthService, NostrService, ModerationService, and PlaybackService to use the shared class.
- Fix CI failure "matches is not iterable" in `js/channelProfile.js` by making `collectChannelVideos` synchronous and adding Array.isArray guards.
- Apply the same fix to `dist/js/channelProfile.js`.
- Add unit tests for SimpleEventEmitter.

Co-authored-by: PR0M3TH3AN <[email protected]>

dist/js/channelProfile.js

@@ -911,6 +911,9 @@ function resolveChannelModeration(pubkey, app = getApp()) {
   }
 
   const matches = collectChannelVideos(normalized, app);
+  if (!Array.isArray(matches)) {
+    return null;
+  }
   let fallbackModeration = null;
   let fallbackVideo = null;
 

js/channelProfile.js

@@ -238,7 +238,7 @@ function decorateChannelVideo(video, app = getApp()) {
   return decoratedVideo;
 }
 
-export async function collectChannelVideos(pubkey, app = getApp()) {
+export function collectChannelVideos(pubkey, app = getApp()) {
   const normalized = normalizeHex(pubkey);
   if (!normalized) {
     return [];
@@ -928,6 +928,10 @@ function resolveChannelModeration(pubkey, app = getApp()) {
   }
 
   const matches = collectChannelVideos(normalized, app);
+  if (!Array.isArray(matches)) {
+    return null;
+  }
+
   let fallbackModeration = null;
   let fallbackVideo = null;