fix(photo.vue): replace hardcoded error tip with internationalization variable

将上传文件过大的硬编码提示替换为国际化语言包变量，实现多语言适配

src/components/pages/workPage/components/photo.vue

@@ -112,7 +112,7 @@ export default {
           const maxSize = 20 * 1024 * 1024; // 20MB
           for (let i = 0; i < files.length; i++) {
             if (files[i].size > maxSize) {
-              this.$message.error('上传文件大小不能超过20MB, 请重新上传');
+              this.$message.error(lang.ssFileTooBig);
               return;
             }
           }