chore: 页面表面回归与数据处理文案适配

页面表面回归选择器更新为 task-overview，任务概览补充表面背景变量，数据处理结果步骤标题文案精简。

frontend/scripts/regression-page-surface.mjs

@@ -181,7 +181,7 @@ assert.match(rootPageCardBlock, /box-shadow:\s*none\s*!important;/, '页面根
 const trainingLogStyle = [trainingLogSource, trainingOverviewSource]
   .flatMap((source) => parseSfc(source).descriptor.styles.map((item) => item.content))
   .join('\n')
-const businessSurfaceBlock = extractCssBlock(trainingLogStyle, '.profile-section,\n.runtime-panel')
+const businessSurfaceBlock = extractCssBlock(trainingLogStyle, '.task-overview')
 assert.match(
   businessSurfaceBlock,
   /background:\s*var\(--app-surface-bg\);/,