goldenChat base source add

backend/src/main/java/com/goldenchart/controller/TradeSignalController.java

@@ -0,0 +1,43 @@
+package com.goldenchart.controller;
+
+import com.goldenchart.dto.TradeSignalDto;
+import com.goldenchart.service.TradeSignalService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+/**
+ * 매매 시그널 이력 REST API.
+ *
+ * <pre>
+ * GET  /api/trade-signals          → 전체 이력
+ * GET  /api/trade-signals?market=  → 종목별 이력
+ * </pre>
+ */
+@RestController
+@RequestMapping("/trade-signals")
+@RequiredArgsConstructor
+public class TradeSignalController {
+
+    private final TradeSignalService service;
+
+    @GetMapping
+    public ResponseEntity<List<TradeSignalDto>> list(
+            @RequestParam(required = false) String market,
+            @RequestHeader(value = "X-User-Id",   required = false) String userIdHeader,
+            @RequestHeader(value = "X-Device-Id", required = false) String deviceId) {
+
+        Long userId = parseUserId(userIdHeader);
+        List<TradeSignalDto> result = (market != null && !market.isBlank())
+                ? service.listByMarket(userId, deviceId, market)
+                : service.list(userId, deviceId);
+        return ResponseEntity.ok(result);
+    }
+
+    private Long parseUserId(String h) {
+        if (h == null || h.isBlank()) return null;
+        try { return Long.parseLong(h); } catch (NumberFormatException e) { return null; }
+    }
+}