fix: 修复CSS样式未正确引入的问题

- 添加 vue.config.js 确保 CSS 被正确提取
- 修正 .drone.yml 中构建输出路径从 dist/dev/h5 改为 dist/build/h5

🤖 Generated with Claude Code

.drone.yml

@@ -15,7 +15,7 @@ steps:
     commands:
       - npm install --legacy-peer-deps
       - npm run build:h5
-      - ls -la dist/dev/h5/
+      - ls -la dist/build/h5/
 
   - name: deploy
     image: appleboy/drone-scp
@@ -24,7 +24,7 @@ steps:
       username: root
       key:
         from_secret: ssh_key
-      source: dist/dev/h5/*
+      source: dist/build/h5/*
       target: /var/www/martial-admin-mini
       strip_components: 3