fix: 部分收付累计释额并扩展结算 E2E 与 CI

账期收付改为按累计已付同步 credit_ledger，修复多笔 partial_paid 与坏账核销重复释额；新增 API E2E（占成、权限、部分收付/坏账）与 GitHub Actions e2e-api job。

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

e2e/database/seeders/E2EPlayerSeeder.php

@@ -3,8 +3,10 @@
 namespace E2E\Seeders;
 
 use App\Models\AdminSite;
+use App\Models\AdminUser;
 use App\Models\Player;
 use App\Models\PlayerWallet;
+use App\Services\Agent\AgentNodeService;
 use App\Support\PlayerAuthSource;
 use Illuminate\Database\Seeder;
 use Illuminate\Support\Facades\DB;
@@ -28,6 +30,7 @@ final class E2EPlayerSeeder extends Seeder
         $mockWalletPort = (string) env('E2E_MOCK_WALLET_PORT', '5555');
 
         $this->ensureDemoIntegrationSite($siteCode, $currency, $mockWalletPort);
+        $this->ensureE2ELeafAgent($siteCode, $password);
 
         // LocalDemoSeeder 可能已建无 password_hash 的 demo_player；合并为一条可登录行。
         Player::query()
@@ -135,4 +138,42 @@ final class E2EPlayerSeeder extends Seeder
             ]);
         }
     }
+
+    private function ensureE2ELeafAgent(string $siteCode, string $password): void
+    {
+        $siteId = (int) AdminSite::query()->where('code', $siteCode)->value('id');
+        if ($siteId <= 0) {
+            return;
+        }
+
+        $exists = DB::table('admin_users')->where('username', 'e2e_leaf_agent')->exists();
+        if ($exists) {
+            return;
+        }
+
+        $rootId = (int) DB::table('agent_nodes')
+            ->where('admin_site_id', $siteId)
+            ->where('depth', 0)
+            ->value('id');
+        if ($rootId <= 0) {
+            return;
+        }
+
+        $super = AdminUser::query()->where('username', 'admin')->first();
+        if ($super === null) {
+            return;
+        }
+
+        app(AgentNodeService::class)->createChild($super, [
+            'parent_id' => $rootId,
+            'code' => 'e2e_leaf',
+            'name' => 'E2E Leaf Agent',
+            'username' => 'e2e_leaf_agent',
+            'password' => $password,
+            'total_share_rate' => 25,
+            'credit_limit' => 200_000,
+            'rebate_limit' => 0.01,
+            'default_player_rebate' => 0.005,
+        ]);
+    }
 }