fix(publish): 放宽技能包上传校验

- application.yml 补齐缺失的文件扩展名白名单(.js,.ts,.png,.jpg,.svg)
- version 为空时自动生成时间戳版本号，不再强制报错

server/skillhub-app/src/main/resources/application.yml

@@ -70,7 +70,7 @@ skillhub:
     max-file-count: 100
     max-single-file-size: 1048576  # 1MB
     max-package-size: 104857600  # 100MB
-    allowed-file-extensions: .py,.json,.yaml,.yml,.txt,.md,.sh
+    allowed-file-extensions: .md,.txt,.json,.yaml,.yml,.js,.ts,.py,.sh,.png,.jpg,.svg
 
 management:
   endpoints:

server/skillhub-domain/src/main/java/com/iflytek/skillhub/domain/skill/service/SkillPublishService.java

@@ -108,7 +108,9 @@ public class SkillPublishService {
         String skillMdContent = new String(skillMd.content());
         SkillMetadata metadata = skillMetadataParser.parse(skillMdContent);
         if (metadata.version() == null || metadata.version().isBlank()) {
-            throw new DomainBadRequestException("error.skill.metadata.requiredField.missing", "version");
+            String autoVersion = java.time.LocalDateTime.now()
+                    .format(java.time.format.DateTimeFormatter.ofPattern("yyyyMMdd.HHmmss"));
+            metadata = new SkillMetadata(metadata.name(), metadata.description(), autoVersion, metadata.body(), metadata.frontmatter());
         }
         String skillSlug = SlugValidator.slugify(metadata.name());