修复「总账备注」在共享镜像页签不生效

- AccountBills::mirrorIndex 的返回漏了 withLedgerRemarks（补丁误落在同一文件的本系统账单表分支），导致抖音/京东账单/京喜账单/京东网银钱包等镜像页签这一列为空
- PagesTest 的抖音账户用例补回归断言：镜像页签行必须带 payload.ledger_remark

modules/EcommerceFinance/Http/Controllers/AccountBills.php

@@ -344,7 +344,7 @@ class AccountBills extends Controller
 
         $data['columns'] = AccountBillColumns::for($billType);
 
-        return response()->json($data);
+        return response()->json($this->withLedgerRemarks($data, $billType));
     }
 
     private function exportMirror(Request $request, string $billType)

tests/Feature/Business/PagesTest.php

@@ -564,6 +564,7 @@ class PagesTest extends FeatureTestCase
                 'id' => '9001',
                 'record_code' => '9001',
                 'store_name' => '放心购旗舰店',
+                'bill_item' => '订单实付',
                 'income' => 88.50,
                 'expense' => 0.0,
                 'payload' => [
@@ -576,10 +577,23 @@ class PagesTest extends FeatureTestCase
         ]);
         $this->app->instance(StoreReceivingDouyinBillMirrorRepository::class, $repository);
 
+        // 回归：镜像页签也必须按「平台 + 账单项目」补齐总账备注。
+        \Illuminate\Support\Facades\DB::table('ec_account_ledger_remarks')->insert([
+            'platform' => '抖音',
+            'bill_item' => '订单实付',
+            'ledger_remark' => '订单收入',
+            'created_at' => now(),
+            'updated_at' => now(),
+        ]);
+        \Illuminate\Support\Facades\Cache::forget(
+            \Modules\EcommerceFinance\Services\AccountLedgerRemarkMap::CACHE_KEY
+        );
+
         $this->loginAs()
             ->withHeader('X-Requested-With', 'XMLHttpRequest')
             ->get(route('ecommerce-finance.account-bills.index', ['bill_type' => 'douyin']))
             ->assertOk()
+            ->assertJsonPath('data.0.payload.ledger_remark', '订单收入')
             ->assertJsonPath('data.0.payload.move_scene', '头条放心购')
             ->assertJsonPath('data.0.payload.settle_account', 'TouTiaoFXGZJ')
             ->assertJsonPath('columns.title', '抖音账户')