重构初始化

app/http/api/controller/trace/TraceController.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace app\http\api\controller\trace;
+
+use app\common\base\BaseController;
+use app\http\api\validation\TraceQueryValidator;
+use app\service\payment\trace\TradeTraceService;
+use support\Request;
+use support\Response;
+
+/**
+ * 统一追踪查询控制器。
+ */
+class TraceController extends BaseController
+{
+    public function __construct(
+        protected TradeTraceService $tradeTraceService
+    ) {
+    }
+
+    /**
+     * 查询指定追踪号对应的完整交易链路。
+     */
+    public function show(Request $request, string $traceNo): Response
+    {
+        $data = $this->validated(
+            array_merge($request->all(), ['trace_no' => $traceNo]),
+            TraceQueryValidator::class,
+            'show'
+        );
+
+        $result = $this->tradeTraceService->queryByTraceNo((string) $data['trace_no']);
+        if (empty($result)) {
+            return $this->fail('追踪单不存在', 404);
+        }
+
+        return $this->success($result);
+    }
+}