fix: Claude Console 配额超限状态优化，支持主动自动恢复

- 新增 rateLimitCleanupService 配额超限恢复检查（每5分钟）
- 调度器预检查配额超限账户，到达重置时间自动恢复
- 前端显示"余额不足"替代默认的"手动停止调度"

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

web/admin-spa/src/views/AccountsView.vue

@@ -4119,6 +4119,10 @@ const getSchedulableReason = (account) => {
     if (account.status === 'unauthorized') {
       return 'API Key无效或已过期（401错误）'
     }
+    // 检查配额超限状态
+    if (account.status === 'quota_exceeded') {
+      return '余额不足'
+    }
     if (account.overloadStatus === 'overloaded') {
       return '服务过载（529错误）'
     }