refactor：拆分 API 路由与请求校验，统一 final 类和代码风格

app/Http/Requests/Admin/WalletTransactionListRequest.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Http\Requests\Admin;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+/**
+ * 钱包流水列表查询请求。
+ *
+ * @see WalletTransactionListController
+ */
+final class WalletTransactionListRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /**
+     * @return array<string, array<int, mixed>>
+     */
+    public function rules(): array
+    {
+        return [
+            'page' => ['sometimes', 'integer', 'min:1'],
+            'per_page' => ['sometimes', 'integer', 'min:1', 'max:100'],
+            'size' => ['sometimes', 'integer', 'min:1', 'max:100'],
+            'player_id' => ['sometimes', 'nullable', 'integer', 'min:1'],
+            'player_account' => ['sometimes', 'nullable', 'string', 'max:128'],
+            'txn_no' => ['sometimes', 'nullable', 'string', 'max:96'],
+            'external_ref_no' => ['sometimes', 'nullable', 'string', 'max:96'],
+            'created_from' => ['sometimes', 'nullable', 'date_format:Y-m-d'],
+            'created_to' => ['sometimes', 'nullable', 'date_format:Y-m-d'],
+            'biz_type' => ['sometimes', 'nullable', 'string', 'max:64'],
+            'status' => ['sometimes', 'nullable', 'string', 'max:128'],
+        ];
+    }
+}