feat(provider-ops): 新增 Sub2API 架构支持并优化余额分项显示

- 新增 Sub2ApiArchitecture 和 Sub2ApiBalanceAction，支持 Sub2API 风格中转站
- 前端 provider 列表支持 balance + points 分项显示
- 验证弹窗适配 Sub2API 余额和积分的分开展示

frontend/src/features/providers/components/ProviderAuthDialog.vue

@@ -493,7 +493,12 @@ async function handleVerify() {
         verifyStatus.value = 'success'
         formChanged.value = false
         const displayName = result.data?.display_name || result.data?.username
-        showSuccess(`用户: ${displayName} | 余额: ${formatQuota(quota)}`, '验证成功')
+        const extra = result.data?.extra
+        let balanceText = `余额: ${formatQuota(quota)}`
+        if (extra && extra.balance !== undefined && extra.points !== undefined) {
+          balanceText = `余额: ${formatQuota(extra.balance)} | 积分: ${formatQuota(extra.points)}`
+        }
+        showSuccess(`用户: ${displayName} | ${balanceText}`, '验证成功')
       }
     } else {
       verifyStatus.value = 'error'