feat(web): mark the active thread unread from the keyboard

[id0Sch]

What Changed

Adds an unbound thread.markUnread command for web and the desktop wrapper. Users assign a shortcut in Settings → Keybindings. The default keybinding set is unchanged.

The handler sits beside pin/settle in ChatView and calls the sidebar's existing markThreadUnread action. It does nothing without a completed turn. Tests cover Settings discovery, custom binding resolution, and the absence of a default binding. User docs explain setup and the optional !terminalFocus condition.

Why

Mark unread currently requires a menu. This lets keyboard users assign a shortcut, following the handler pattern from #8440.

Proposed first in Ideas #10723. I understand this feature PR may be closed or deferred.

UI Changes

Keyboard recording: marking unread restores the Done badge, and typing in the composer leaves the thread unread. The recording uses Ctrl+Shift+U; it demonstrates the handler, not a shipped default. Assign a shortcut before using the command.

Before shortcut	After shortcut

Validation

• 163 focused tests passed across shortcut resolution, Settings keybinding logic, server keybindings, and contract schemas. Web/shared typechecks, targeted lint, formatting, and the commit hook passed.
• The handler was verified in Linux Chromium over Tailscale: context-menu parity, retained focus, unread persistence while typing, repeated presses, clearing on reopen, and empty-thread no-op. Terminal-focus exclusion was verified with !terminalFocus. Native Electron was not run.

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

Model: GPT-6. Harness: Codex.

Summary by CodeRabbit

• New Features

  • Added a Mark unread action for threads with completed responses.
  • Assign a custom keyboard shortcut to mark the active thread unread; no shortcut is assigned by default.
  • Threads remain unread until reopened or a new turn is completed.
  • The action is available from a thread’s menu on web and desktop.

• Documentation

  • Documented the action, shortcut setup, and recommended shortcut conditions.

[macroscopeapp]

Approvability

Verdict: Approved at 11c2674

Macroscope's review found this PR approvable — This adds a small, opt-in keyboard command that reuses the existing thread-unread state behavior and leaves the default keybinding set unchanged. The remaining changes are command-resolution tests and documentation, with no schema, deployment, security, billing, or static-analysis configuration impact.

^{You can add or adjust custom eligibility rules. Learn more.}

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📥 Commits

Reviewing files that changed from the base of the PR and between c5219a097f46fdb5f1b4796183a5cfabc9caa102 and c5e3265.

📒 Files selected for processing (6)

• apps/web/src/components/ChatView.tsx
• apps/web/src/components/settings/KeybindingsSettings.logic.test.ts
• apps/web/src/keybindings.test.ts
• docs/user/keybindings.md
• docs/user/thread-sidebar.md
• packages/contracts/src/keybindings.ts

🚧 Files skipped from review as they are similar to previous changes (4)

• docs/user/thread-sidebar.md
• apps/web/src/keybindings.test.ts
• packages/contracts/src/keybindings.ts
• docs/user/keybindings.md

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📝 Walkthrough

Walkthrough

The change adds thread.markUnread to keybinding contracts and tests. ChatView handles the command for server threads using the latest turn completion time. User documentation describes shortcut and menu access.

Changes

Thread mark-unread support

Layer / File(s)	Summary
Keybinding contract and resolution tests packages/contracts/src/keybindings.ts, apps/web/src/components/settings/KeybindingsSettings.logic.test.ts, apps/web/src/keybindings.test.ts	The thread.markUnread command is added to keybinding command sets. Tests verify that it has no default binding and resolves custom shortcuts.
ChatView shortcut handling apps/web/src/components/ChatView.tsx	ChatView handles thread.markUnread for server threads and calls markThreadUnread with the latest turn completion time.
Mark-unread documentation docs/user/keybindings.md, docs/user/thread-sidebar.md	The documentation describes the command, the thread-menu action, shortcut conditions, and read-state behavior.

Estimated code review effort: 2 (Simple) | ~10 minutes

Sequence Diagram(s)

sequenceDiagram
  participant User
  participant ChatView
  participant UIStateStore
  User->>ChatView: Invokes thread.markUnread
  ChatView->>ChatView: Checks the server thread and latest turn
  ChatView->>UIStateStore: Calls markThreadUnread with completedAt

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Suggested reviewers: bil0000

Merge Risk: ⚪ Minimal · up to c5e32

The shortcut now leaves threads without a completed turn untouched. No outstanding issue blocks merging 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 1 functions across 4 files. (2 skipped: 2 …	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: adding keyboard support to mark the active thread unread.
Description check	✅ Passed	The description includes complete What Changed, Why, UI Changes, and Checklist sections. It explains the implementation, testing, validation results, and known limitation that native Electron was not …
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.

Full details: Docstring Coverage

Explanation

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 1 functions across 4 files. (2 skipped: 2 unsupported.)

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Actionable comments posted: 1

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Inline comments:
In `@apps/web/src/components/ChatView.tsx`:
- Around line 6661-6664: Update the shortcut handler around markThreadUnread to
validate activeLatestTurn?.completedAt along with isServerThread and
activeThreadKey before calling preventDefault and stopPropagation. Only consume
the event and invoke markThreadUnread when a completed timestamp exists;
otherwise preserve the default action and propagation.

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📥 Commits

Reviewing files that changed from the base of the PR and between c0dded8 and 11c2674ce5483a61eb3f643f5c41a8a0ddc516d6.

📒 Files selected for processing (6)

• apps/web/src/components/ChatView.tsx
• apps/web/src/components/settings/KeybindingsSettings.logic.test.ts
• apps/web/src/keybindings.test.ts
• docs/user/keybindings.md
• docs/user/thread-sidebar.md
• packages/contracts/src/keybindings.ts

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[juliusmarminge]

Thanks for working on this. We merged the orchestrator V2 rewrite in #2829, and we are closing this PR as part of that transition.

The patch conflicts with the rewrite in apps/web/src/components/ChatView.tsx. Even where the conflict is small enough to rebase, we are asking for fresh PRs against the new base so we can review and verify the behavior in V2.

Sorry for the extra work this creates. If the change is still needed on V2, please rebuild it on current main, verify it there, and open a new PR linking back here. We're closing the current implementation without assuming the underlying request is resolved.