feat(billing): show subscription quota usage in admin usage records

Surface billing_source from h5_usage_records so plan-covered consumption
displays as 套餐额度 instead of missing from the usage tab.

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

server/pagination.mjs

@@ -156,7 +156,7 @@ export async function listUsagePaged(pool, query) {
   );
   const [rows] = await pool.query(
     `SELECT r.id, r.user_id, u.username, u.display_name, r.agent_session_id, r.request_id,
-            r.input_tokens, r.output_tokens, r.cost_cents, r.balance_after_cents, r.created_at
+            r.input_tokens, r.output_tokens, r.cost_cents, r.balance_after_cents, r.billing_source, r.created_at
      FROM h5_usage_records r
      JOIN h5_users u ON u.id = r.user_id
      ${where}
@@ -176,6 +176,7 @@ export async function listUsagePaged(pool, query) {
       outputTokens: Number(row.output_tokens),
       costCents: Number(row.cost_cents),
       balanceAfterCents: Number(row.balance_after_cents),
+      billingSource: row.billing_source ?? 'wallet',
       createdAt: Number(row.created_at),
     })),
     total: Number(total),

src/admin/pages/BillingPage.tsx

@@ -450,6 +450,11 @@ function UsageRecordsTable({
   result: PagedResult<UsageRecord>;
   onPage: (page: number) => void;
 }) {
+  const formatBillingSource = (row: UsageRecord) => {
+    if (row.billingSource === 'subscription') return '套餐额度';
+    return `¥${formatYuan(row.costCents)}`;
+  };
+
   return (
     <>
       <div className="admin-table-wrap">
@@ -474,8 +479,10 @@ function UsageRecordsTable({
                 </td>
                 <td className="billing-num">{row.inputTokens.toLocaleString()}</td>
                 <td className="billing-num">{row.outputTokens.toLocaleString()}</td>
-                <td className="billing-num">¥{formatYuan(row.costCents)}</td>
-                <td className="billing-num">¥{formatYuan(row.balanceAfterCents)}</td>
+                <td className="billing-num">{formatBillingSource(row)}</td>
+                <td className="billing-num">
+                  {row.billingSource === 'subscription' ? '—' : `¥${formatYuan(row.balanceAfterCents)}`}
+                </td>
               </tr>
             ))}
           </tbody>

src/admin/pages/DashboardPage.tsx

@@ -238,7 +238,9 @@ export function DashboardPage() {
                         <td>
                           in {row.inputTokens} / out {row.outputTokens}
                         </td>
-                        <td>¥{formatYuan(row.costCents)}</td>
+                        <td>
+                          {row.billingSource === 'subscription' ? '套餐额度' : `¥${formatYuan(row.costCents)}`}
+                        </td>
                       </tr>
                     ))
                   )}

src/types.ts

@@ -244,6 +244,7 @@ export type UsageRecord = {
   outputTokens: number;
   costCents: number;
   balanceAfterCents: number;
+  billingSource: 'wallet' | 'subscription';
   createdAt: number;
 };