feat: refactor super admin to use is_super_admin flag and enhance site deletion logic

- Changed super admin detection from role-based to `is_super_admin` flag in AdminUser model
- Added `requireDefaultAdminSiteId()` method to throw validation error when no integration site exists
- Enhanced site deletion to migrate platform role bindings to fallback site and auto-delete site-specific admin accounts
- Made agent line code optional with auto-generation fallback using `{site_code}-agent-{counter}` format

tests/Feature/CreditWalletLogsTest.php

@@ -57,3 +57,80 @@ test('credit player wallet logs reads credit_ledger not wallet_txns', function (
         ->assertJsonPath('data.items.0.biz_type', 'bet_hold')
         ->assertJsonPath('data.items.0.ledger_source', 'credit_ledger');
 });
+
+test('credit player wallet logs distinguish win credit from bill settlement', function (): void {
+    $player = Player::query()->create([
+        'site_code' => 'default_site',
+        'site_player_id' => 'native:logs-2',
+        'auth_source' => PlayerAuthSource::LOTTERY_NATIVE,
+        'funding_mode' => PlayerFundingMode::CREDIT,
+        'username' => 'credit_logs_2',
+        'default_currency' => 'NPR',
+        'status' => 0,
+    ]);
+
+    DB::table('player_credit_accounts')->insert([
+        'player_id' => $player->id,
+        'credit_limit' => 500,
+        'used_credit' => 0,
+        'frozen_credit' => 0,
+        'created_at' => now(),
+        'updated_at' => now(),
+    ]);
+
+    DB::table('credit_ledger')->insert([
+        [
+            'owner_type' => 'player',
+            'owner_id' => $player->id,
+            'amount' => 3600,
+            'reason' => 'settlement_payout',
+            'ref_type' => 'settlement_bill',
+            'ref_id' => 25,
+            'created_at' => now()->subMinute(),
+            'updated_at' => now()->subMinute(),
+        ],
+        [
+            'owner_type' => 'player',
+            'owner_id' => $player->id,
+            'amount' => 1200,
+            'reason' => 'game_settlement_win',
+            'ref_type' => 'ticket_item',
+            'ref_id' => 99,
+            'created_at' => now(),
+            'updated_at' => now(),
+        ],
+    ]);
+
+    $response = $this->withHeader('Authorization', 'Bearer dev:'.$player->id)
+        ->getJson('/api/v1/wallet/logs?page=1&size=10');
+
+    $response->assertOk()
+        ->assertJsonPath('data.total', 2)
+        ->assertJsonPath('data.items.0.type', 'win_credit')
+        ->assertJsonPath('data.items.0.biz_type', 'game_settlement_win')
+        ->assertJsonPath('data.items.0.affects_available_credit', true)
+        ->assertJsonPath('data.items.1.type', 'bill_settlement')
+        ->assertJsonPath('data.items.1.biz_type', 'settlement_payout')
+        ->assertJsonPath('data.items.1.affects_available_credit', false)
+        ->assertJsonPath('data.items.1.balance_after', null);
+
+    expect($response->json('data.items.0.balance_after'))->not->toBeNull();
+
+    $this->withHeader('Authorization', 'Bearer dev:'.$player->id)
+        ->getJson('/api/v1/wallet/logs?type=bill_settlement')
+        ->assertOk()
+        ->assertJsonPath('data.total', 1)
+        ->assertJsonPath('data.items.0.type', 'bill_settlement');
+
+    $this->withHeader('Authorization', 'Bearer dev:'.$player->id)
+        ->getJson('/api/v1/wallet/logs?type=win_credit')
+        ->assertOk()
+        ->assertJsonPath('data.total', 1)
+        ->assertJsonPath('data.items.0.type', 'win_credit');
+
+    $this->withHeader('Authorization', 'Bearer dev:'.$player->id)
+        ->getJson('/api/v1/wallet/logs?type=credit_release')
+        ->assertOk()
+        ->assertJsonPath('data.total', 1)
+        ->assertJsonPath('data.items.0.type', 'win_credit');
+});