⚡ perf(vscode): 代码阅读预览的卡片位置量过就记着，内容或大小变了才重量：粘性标题、记滚动位置、上报可见行、跳转按顶层块二分找，滚动时不再每帧量全部卡片，滚动回调里也不读会逼排版的位置

vscode/webview-ui/src/codeReader/StickyLines.tsx

@@ -2,10 +2,11 @@ import type { ReactElement, RefObject } from 'react'
 import type { BlockView, StickyScrollSettings } from './types'
 import { useContext, useLayoutEffect, useMemo } from 'react'
 import { KindIcon } from './kindIcons'
+import { pageLayout } from './pageLayout'
 import { SegmentText, TextMarksContext } from './SegmentText'
 import { selectStore } from './store'
 import { flash } from './useReveal'
-import { pinnedHeight, usePinnedHeight } from './useScrollPosition'
+import { usePinnedHeight } from './useScrollPosition'
 import { STICKY_LINE_HEIGHT, stickyInset, useStickyLines } from './useStickyScroll'
 
 /** 块 id → 块，连同各层子块 */
@@ -74,7 +75,7 @@ export function StickyLines({ content, blocks, settings }: { content: RefObject<
     const card = content.current?.querySelector<HTMLElement>(`.cr-block[data-id="${id}"]`)
     if (!card)
       return
-    window.scrollTo(0, card.getBoundingClientRect().top + window.scrollY - pinnedHeight() - stickyInset(card, settings))
+    window.scrollTo(0, card.getBoundingClientRect().top + window.scrollY - pageLayout.pinnedHeight() - stickyInset(card, settings))
     flash(card)
   }