fix: 文件上传接口调整

src/main/java/com/petstore/controller/FileController.java

@@ -96,7 +96,8 @@ public class FileController {
             .body(new FileSystemResource(file));
     }
     
-    @PostMapping("/image")
+    /** produces 显式 UTF-8，避免网关/客户端按 ISO-8859-1 解码导致 message 中文乱码 */
+    @PostMapping(value = "/image", produces = MediaType.APPLICATION_JSON_VALUE + ";charset=UTF-8")
     public Map<String, Object> uploadImage(@RequestParam("file") MultipartFile file) {
         Map<String, Object> result = new HashMap<>();
         

src/main/resources/application.yml

@@ -28,6 +28,10 @@ server:
   port: 8080
   servlet:
     context-path:
+    encoding:
+      charset: UTF-8
+      enabled: true
+      force: true
   # 与 multipart 一致，避免嵌入式 Tomcat 仍限制表单体积导致大视频 413
   tomcat:
     max-http-form-post-size: 200MB