feat: chat uploads, vision turn isolation, and MindSpace agent improvements

Add chat file/image upload UX, attachment proxying, vision thumbnails, and per-turn image scoping so agents only use the current upload. Extend MindSpace asset context, billing token state, OA/scenario verify scripts, and related runtime config.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/components/NotificationCenter.tsx

@@ -8,6 +8,7 @@ import {
   subscribeNotificationEvents,
 } from '../api/client';
 import type { UserNotification } from '../types';
+import { isRechargeNotification, requestBalanceRefresh } from '../utils/balanceRefresh';
 
 const POPOVER_WIDTH = 340;
 const HEADER_POPOVER_OPEN_EVENT = 'tkmind:header-popover-open';
@@ -67,7 +68,12 @@ export function NotificationCenter({
     };
     void load('all');
     const unsubscribe = subscribeNotificationEvents({
-      onNotification: () => void load('all'),
+      onNotification: (notification) => {
+        if (isRechargeNotification(notification)) {
+          requestBalanceRefresh();
+        }
+        void load('all');
+      },
       onSync: () => void load('all'),
     });
     window.addEventListener('focus', syncAll);