fix(web): return focus to the composer after saving a citation note

[mackinleysmith]

What Changed

Saving a citation note with Enter can leave focus on the chip's edit button instead of the composer. It happens when the note editor was opened from that button. From there Enter reopens the note and Tab moves to the model picker, so the keyboard can't send the message. The Cite toolbar path already returned focus to the composer, but put the caret at the end of the prompt.

• When the note popover closes after save or cancel, the caret now goes right after the chip, whichever way the popover was opened. This uses the popover's finalFocus. It restores focus only if focus is on the body or still inside the popover, so moving to another control is respected.
• Shift+Tab with the caret directly after a citation chip focuses that chip's edit button. The browser's own tab order skips it because the chip is inside the editor. Anywhere else, Shift+Tab behaves as before, including the opt-in plan-mode toggle.
• Tab from the edit button returns to the caret after the chip. On a read-only composer, Tab keeps its default behavior.
• The trigger gets a data-citation-comment-trigger attribute so the editor can find it. Base UI's PopoverTrigger overwrites data-slot.

Why

After writing a note, the next thing you usually do is send the message or fix the note. Both should work from the keyboard: Enter sends, and Shift+Tab then Enter reopens the note.

UI Changes

No visual change, only where keyboard focus goes. The screenshots are from a dev build against a copy of real thread data, cropped to the composer. In each case the note was opened from the edit button, typed, and saved with Enter.

Before: focus is left on the edit button (note the focus ring on the pencil).

After: the caret is back in the composer, right after the chip. Enter sends from here.

After, then Shift+Tab: focus moves to the edit button, where Enter reopens the note.

Full keyboard pass:

Step	Focus after
Cite, type a note, Enter	Composer, caret after the chip
Shift+Tab	Chip's edit button
Tab	Composer, caret after the chip
Shift+Tab, Enter, edit, Enter	Composer, caret after the chip; chip shows the edited note
Shift+Tab, Enter, Esc	Composer, caret after the chip
Type text, then Shift+Tab	Previous control, as before

No video: the automated browser runs as a background tab, where each synthetic key press first fires a window focus event. That trips the existing window-focus refocus in ChatView, which isn't part of this change. The screenshots were taken with that event suppressed in the test tab.

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for animation/interaction changes (see above)

Checks run: vp test run apps/web/src/components/chat/AssistantCitationChip.test.tsx, web typecheck, and vp lint on the changed files.

Written by Claude Opus 5.5 in Claude Code, running inside T3 Code.

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Approvability

Verdict: Approved at eb544d2

Macroscope's review found this PR approvable — This is a small, self-contained web fix that adjusts keyboard focus among the citation popover, its trigger, and the existing composer caret. Its effects are localized to composer interaction behavior, with no schema, infrastructure, security, billing, default, or static-analysis changes.

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ℹ️ Recent review info

⚙️ Run configuration

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📥 Commits

Reviewing files that changed from the base of the PR and between 0c4ec2d and eb544d2.

📒 Files selected for processing (2)

• apps/web/src/components/ComposerPromptEditorTiptap.tsx
• apps/web/src/components/chat/AssistantCitationChip.tsx

🚧 Files skipped from review as they are similar to previous changes (2)

• apps/web/src/components/ComposerPromptEditorTiptap.tsx
• apps/web/src/components/chat/AssistantCitationChip.tsx

Included review availability: Your plan provides up to 10 included reviews per hour; 8 remain after this review.

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📝 Walkthrough

Walkthrough

The composer now handles keyboard focus between citation comment triggers and the caret after a citation. When the citation popover closes, it can also return focus to the editor under specified focus conditions.

Changes

Citation focus navigation

Layer / File(s)	Summary
Popover focus restoration apps/web/src/components/chat/AssistantCitationChip.tsx, apps/web/src/components/ComposerPromptEditorTiptap.tsx	The commentEditor prop adds an onRestoreFocus callback. The trigger has a data attribute. When the popover closes, it calls the callback if focus is on the document body or inside the popup. The editor callback restores the caret after the citation.
Keyboard navigation around citation triggers apps/web/src/components/ComposerPromptEditorTiptap.tsx	Shift+Tab from a collapsed caret immediately after a citation focuses its comment trigger. Forward Tab from that trigger restores the caret after the citation when the editor is editable.

Estimated code review effort: 2 (Simple) | ~12 minutes

Sequence Diagram(s)

sequenceDiagram
  participant ComposerPromptEditorTiptap
  participant AssistantCitationChip
  participant PopoverPopup
  ComposerPromptEditorTiptap->>AssistantCitationChip: Focus the comment trigger on Shift+Tab
  AssistantCitationChip->>ComposerPromptEditorTiptap: Restore the caret on forward Tab
  PopoverPopup->>AssistantCitationChip: Run finalFocus when the popover closes
  AssistantCitationChip->>ComposerPromptEditorTiptap: Restore focus when active element is body or inside popup

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Merge Risk: ⚪ Minimal · up to eb544

No actionable focus-navigation issue remains; the change is mergeable after normal checks.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 3 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly and concisely describes the main change: restoring focus to the composer after saving a citation note.
Description check	✅ Passed	The description includes the required What Changed, Why, UI Changes, and Checklist sections. It explains the keyboard-focus behavior, documents the UI interaction with screenshots, explains why no vid…

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Actionable comments posted: 2

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Inline comments:
In `@apps/web/src/components/chat/AssistantCitationChip.tsx`:
- Around line 181-184: Update the focus check before
commentEditor.onRestoreFocus so it only restores focus when
document.activeElement is document.body or is inside the closing citation
popover. Track the popover element with a ref and use its containment check
instead of isInsideComposerFloatingLayer, preserving focus on controls in other
composer floating layers.

In `@apps/web/src/components/ComposerPromptEditorTiptap.tsx`:
- Around line 387-407: Update the citation chip’s onKeyDown handler to return
when editor.isEditable is false before calling preventDefault; preserve the
existing Tab and citation-trigger checks for editable mode.

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Configuration used: Repository: pingdotgg/t3code/.coderabbit.yaml

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Run ID: 53102091-b40a-43fa-b7ce-80d7ce5cf39f

📥 Commits

Reviewing files that changed from the base of the PR and between cb1a3f3 and 0c4ec2d.

📒 Files selected for processing (2)

• apps/web/src/components/ComposerPromptEditorTiptap.tsx
• apps/web/src/components/chat/AssistantCitationChip.tsx

Included review availability: Your plan provides up to 10 included reviews per hour; 9 remain after this review.

Dismissing prior approval to re-evaluate eb544d2