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/utils/balanceRefresh.ts

@@ -0,0 +1,21 @@
+import type { UserNotification } from '../types';
+
+export const BALANCE_REFRESH_EVENT = 'tkmind:balance-refresh';
+
+const RECHARGE_NOTIFICATION_TYPES = new Set(['admin_recharge', 'self_recharge', 'recharge']);
+
+export function isRechargeNotification(
+  notification: Pick<UserNotification, 'notificationType' | 'title' | 'body'>,
+): boolean {
+  if (RECHARGE_NOTIFICATION_TYPES.has(String(notification.notificationType ?? '').trim())) {
+    return true;
+  }
+  const title = String(notification.title ?? '');
+  const body = String(notification.body ?? '');
+  return /充值/.test(title) && /余额已更新/.test(body);
+}
+
+export function requestBalanceRefresh() {
+  if (typeof window === 'undefined') return;
+  window.dispatchEvent(new CustomEvent(BALANCE_REFRESH_EVENT));
+}