#4214 feat(panel): Luke's File-tab notes on the annotation card, under the last line

Summary

This is PR 2 of 3 for the approved "Code annotations: one card" design (v3). It stacks on #4203.

• Luke's File-tab notes now use the shared AnnotationCard. Luke is recognisable by his wing mark (transcript-luke-mark, at 20px) and his name in --voice-luke, not by a different box. The card has no footer. It shows no lines in the header and no preview when folded.
• Placement: the card sits below the range's last line (notesAfter), not before its first. It starts at the code column, past the 48px line-number gutter, or at a 12px inset with line numbers off. In a place under 440px it sits at the pane's 8px inset. With unwrapped lines it still stays in view, sticky-left within the pane.
• ⋯ menu, replacing "Show in Code":
  • View in conversation opens the turn of Luke's Work that showed those lines.
  • Copy link copies that turn's Luke link (LINK_PLACE.TURN, /plan/<id>/work/<shownAt>), an existing link place. I found no link place for the note itself, so nothing new was added.
  • "Show in Code" and its whole chain are removed: FileNotes.onShow, FileView.onShowNote, side-panel showNote / codeReveal, and CodePane's reveal / onRevealed.
• Hover: pointing at a note, or moving into it with the keyboard, lights its lines with the lines' pointed style (data-pointed, through CodeLineRows' new lit range). The range the user arrived at stays lit as before.
• Kept as before: the folded state is still remembered per tab, and ⌘F still finds a folded note's words.

Evidence

Screenshots come from a harness that runs the real FileTab, with fixture lines and a note on lines 6–10, under the built styles.css.

• tsc --noEmit for packages/panel and apps/desktop: clean.
• ./scripts/oxlint.sh: 0 warnings, 0 errors.
• biome check: clean on the changed files.
• pnpm knip: clean.
• ./scripts/repository-checks.sh: passed.
• vitest: the note, link, File tab, side panel and code card suites pass.

file-note.test.ts is rewritten. It covers:

• Placement: the note stands after line 5, the last line of its range, and before line 6. On a file since shortened inside the range, it stands after the file's last line; one wholly past the end stands nowhere.
• Folded: a folded note shows no words, and a find still reaches them once.
• Head press: pressing the head tells the tab.
• ⋯ menu: it offers exactly View in conversation and Copy link. View opens TURN {planId, at: shownAt}. Copy link copies https://tryluke.dev/acme/plan/<id>/work/<shownAt>.
• Hover and focus: the pointer or keyboard focus reports the note's lines, and leaving lets them go.
• Lit lines: lines a note lights are drawn data-pointed beside the pointed ones.

Screenshots

	Before	After
File tab, 900px, dark
File tab, 900px, light
File tab, 360px, dark
File tab, 360px, light

Hover (lit lines)	Folded	⋯	360px, unwrapped (sticky)

Invariants

• Every behavior change has, in this PR, the test that fails without it; no change-detector test added.
• No new as type assertion, raw async primitive, or Effect run outside the edges.
• Test count: file-note.test.ts goes from 2 tests to 7.
• Doc comments naming the changed parts are edited (file-note.tsx, file-tab.tsx, code-pane.tsx, tasks.css).
• PRIVACY.md unchanged.

Notes

• Minimize inline comments for Luke's notes in a File tab is not in this PR. The File tab's View settings offer only Wrap and Line numbers, so it would need a new File-view setting and a folded form for notes. I've sent that to the orchestrator to decide.

Made with Luke