Prioritize cited chunks in parsed list

[suguanYang]

Summary

• Replace citation focus scrolling with a simpler prioritized-list behavior: the focused/cited chunk is moved to index 0 and highlighted there.
• Reset the chunk virtualizer to offset 0 whenever a focused chunk request is applied, so the parsed chunk list starts at the highlighted citation chunk.
• Remove the special virtual range injection and scrollIntoView path that tried to jump to the focused chunk at its original virtual index.

Verification

• Red first: pnpm test src/components/chunks-panel.test.ts -- --runInBand and pnpm test src/components/workspace-shell.test.ts -- --runInBand failed before implementation because focused/cited chunks stayed at their original index.
• pnpm test src/components/chunks-panel.test.ts -- --runInBand
• pnpm test src/components/workspace-shell.test.ts -- --runInBand
• pnpm test
• pnpm exec tsc --noEmit
• pnpm lint
• pnpm build
• git diff --check
• Real browser mobile check with Chrome DevTools at 390x844: clicked a TSLA demo citation to table-13; after the fix the table-13 row was data-index="0", data-focused-chunk="true", viewport scrollTop=0, and the row was about 12px below the chunks viewport top.

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Project	Deployment	Actions	Updated (UTC)
knowhere-notebook-staging	Ready	Preview, Comment	May 10, 2026 7:22am