fix(appearance): 503 改 sendError 直写——绕过 GlobalExceptionHandler 兜底（线上实测发现）

src/main/java/com/yunhai/svchall/controller/api/AppearanceProxyController.java

@@ -5,12 +5,12 @@ import com.yunhai.platform.openapi.core.YschOpenCall;
 import com.yunhai.platform.utils.model.BoaUser;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.springframework.http.HttpStatus;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
-import org.springframework.web.server.ResponseStatusException;
 
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -45,15 +45,17 @@ public class AppearanceProxyController {
     }
 
     @GetMapping("appearance")
-    public JsonNode appearance(BoaUser authUserWithDept) {
+    public JsonNode appearance(BoaUser authUserWithDept, HttpServletResponse response) throws IOException {
         try {
             Map<String, String> q = new HashMap<>();
             q.put("userId", String.valueOf(authUserWithDept.getId())); // 服务端取登录人，不收前端参数
             return openCall.get(TARGET_USERHOME, "/oapi/appearance", q, JsonNode.class);
         } catch (Exception e) {
+            // 降级铁律：sendError 直写 503 绕过 GlobalExceptionHandler（否则被兜成 200+code:6 信封）
             log.warn("[appearance] UserHome 外观偏好不可达（503，init 侧静默不动本地键）userId={}：{}",
                     authUserWithDept.getId(), e.toString());
-            throw new ResponseStatusException(HttpStatus.SERVICE_UNAVAILABLE, "appearance unavailable");
+            response.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE, "appearance unavailable");
+            return null;
         }
     }
 }