알림삭제 기능 추가

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

@@ -12,8 +12,11 @@ import java.util.List;
  * 매매 시그널 이력 REST API.
  *
  * <pre>
- * GET  /api/trade-signals          → 전체 이력
- * GET  /api/trade-signals?market=  → 종목별 이력
+ * GET    /api/trade-signals              → 전체 이력
+ * GET    /api/trade-signals?market=      → 종목별 이력
+ * DELETE /api/trade-signals/{id}         → 단건 삭제
+ * DELETE /api/trade-signals              → 전체 삭제
+ * POST   /api/trade-signals/delete-batch → ID 목록 삭제
  * </pre>
  */
 @RestController
@@ -36,6 +39,32 @@ public class TradeSignalController {
         return ResponseEntity.ok(result);
     }
 
+    @DeleteMapping("/{id}")
+    public ResponseEntity<Void> deleteOne(
+            @PathVariable Long id,
+            @RequestHeader(value = "X-User-Id",   required = false) String userIdHeader,
+            @RequestHeader(value = "X-Device-Id", required = false) String deviceId) {
+        service.deleteOne(id, parseUserId(userIdHeader), deviceId);
+        return ResponseEntity.noContent().build();
+    }
+
+    @DeleteMapping
+    public ResponseEntity<java.util.Map<String, Integer>> deleteAll(
+            @RequestHeader(value = "X-User-Id",   required = false) String userIdHeader,
+            @RequestHeader(value = "X-Device-Id", required = false) String deviceId) {
+        int deleted = service.deleteAll(parseUserId(userIdHeader), deviceId);
+        return ResponseEntity.ok(java.util.Map.of("deleted", deleted));
+    }
+
+    @PostMapping("/delete-batch")
+    public ResponseEntity<java.util.Map<String, Integer>> deleteBatch(
+            @RequestBody java.util.List<Long> ids,
+            @RequestHeader(value = "X-User-Id",   required = false) String userIdHeader,
+            @RequestHeader(value = "X-Device-Id", required = false) String deviceId) {
+        int deleted = service.deleteBatch(ids, parseUserId(userIdHeader), deviceId);
+        return ResponseEntity.ok(java.util.Map.of("deleted", deleted));
+    }
+
     private Long parseUserId(String h) {
         if (h == null || h.isBlank()) return null;
         try { return Long.parseLong(h); } catch (NumberFormatException e) { return null; }