feat(M5): FR-A3/A4 主题CSS变量全接线——25 文件 168 处硬编码色替换为 var(--accent/--glow/--accent-text/--text-primary/--text-secondary/--text-tertiary/--control-border/--bg-secondary); 语义色(错误红/确认/警告/成功)保留; hljs 语法色保留; typecheck+E2E 21/21 绿

apps/desktop/src/renderer/features/editor/Editor.tsx

@@ -20,7 +20,7 @@ export function Editor() {
   }
   return (
     <div style={{ flex: 1, display: 'flex', flexDirection: 'column', overflow: 'hidden' }}>
-      <div style={{ padding: '6px 16px', borderBottom: '1px solid #333', display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
+      <div style={{ padding: '6px 16px', borderBottom: '1px solid var(--control-border)', display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
         <span>{title} <span style={{ opacity: 0.4, fontSize: 12 }}>{currentPath}</span></span>
         <div style={{ display: 'flex', alignItems: 'center', gap: 12 }}>
           <span style={{ fontSize: 12, opacity: saveState === 'error' ? 1 : 0.5, color: saveState === 'error' ? '#f88' : 'inherit' }}>{saveLabel(saveState)}</span>