merge: sync upstream duckietm/Dev (b2318b9) into feat/react19-modernization

Absorbs 10 upstream commits (JSON5 config support, user-settings reset
password/email/username, wear-badge popup fix, login screen fix, About
update, offer selection logic, client path fix).

Conflicts resolved by keeping the modernized React 19 / Zustand / Form
Actions structure and porting upstream intent surgically:

- bootstrap.ts: kept GetConfiguration().init() pre-init + useEffectEvent,
  added JSON5 import (already wired into the parse fallback)
- LoginView.tsx: kept Form Actions (useActionState/useFormStatus); the
  upstream persistAccessTokenFromPayload(payload) fix was already
  integrated in the modernized SSO branch
- App.tsx: kept useEffectEvent import + StrictMode/ErrorBoundary umbrella
- vite.config.mjs: kept sirv plugin + react-compiler babel; absorbed
  upstream's base: process.env.VITE_BASE || './'
- package.json: kept superset (sirv, Vitest, Zustand, react-colorful,
  React Compiler) + added json5
- User-settings views: accepted upstream (duplicate of local cherry-pick
  2053c8e); notification badge bubble: accepted upstream fix

Verification: yarn typecheck clean, 193/193 Vitest, yarn build green.

src/hooks/notification/useNotification.ts

@@ -224,8 +224,18 @@ const useNotificationStore = () =>
     useMessageEvent<HabboBroadcastMessageEvent>(HabboBroadcastMessageEvent, event =>
     {
         const parser = event.getParser();
+        const raw = parser.message.replace(/\\r/g, '\r');
 
-        simpleAlert(parser.message.replace(/\\r/g, '\r'), null, null, LocalizeText('notifications.broadcast.title'));
+        const sentinel = '[NITRO_INFO_V1]';
+
+        if(raw.startsWith(sentinel))
+        {
+            const body = raw.substring(sentinel.length).replace(/^[\r\n]+/, '');
+            simpleAlert(body, NotificationAlertType.NITRO_INFO, null, null, LocalizeText('nitro.info.title'));
+            return;
+        }
+
+        simpleAlert(raw, null, null, LocalizeText('notifications.broadcast.title'));
     });
 
     useMessageEvent<AchievementNotificationMessageEvent>(AchievementNotificationMessageEvent, event =>