fix(ui): 主题与脑图浅色适配、标签配色及静态资源缓存

- 浅色模式下用例脑图区域改为浅色样式
- 恢复 el-tag 按 success/warning/info 等类型的颜色
- 启动时应用主题，Home 内容区深色样式兜底
- nginx 禁止缓存 index.html，hash 静态资源长期缓存

Co-authored-by: Cursor <cursoragent@cursor.com>

nginx.conf

@@ -1,12 +1,24 @@
+# 发版后避免浏览器长期使用旧 index 引用旧 js/css
 server {
     listen 80;
     server_name localhost;
-    
+
     client_max_body_size 100m;
 
     root /usr/share/nginx/html;
     index index.html;
 
+    location = /index.html {
+        add_header Cache-Control "no-store, no-cache, must-revalidate, max-age=0" always;
+        add_header Pragma "no-cache" always;
+    }
+
+    location ^~ /static/ {
+        expires 1y;
+        add_header Cache-Control "public, immutable" always;
+        access_log off;
+    }
+
     location /it/api/ {
         proxy_pass http://172.18.0.1:5010;
         proxy_set_header Host $host;