feat: 更新嵌入式文件系统逻辑，支持路径清理和静态资源请求处理，增强前端主题切换能力

atsf_server/web/components/feedback/feature-placeholder.tsx

@@ -21,7 +21,7 @@ export function FeaturePlaceholder({
       <ul className='space-y-3 text-sm leading-6 text-[var(--foreground-secondary)]'>
         {milestones.map((item) => (
           <li key={item} className='flex gap-3'>
-            <span className='mt-2 h-2 w-2 shrink-0 rounded-full bg-sky-400' />
+            <span className='mt-2 h-2 w-2 shrink-0 rounded-full bg-[var(--brand-primary)]' />
             <span>{item}</span>
           </li>
         ))}