feat(app): unarchive sessions

[neriousy]

Issue for this PR

Closes#16000

Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

What does this PR do?

• Adds view to browse archived sessions
• Adds ability to unarchive a session

If you paste a large clearly AI generated description here your PR may be IGNORED or CLOSED!

How did you verify your code works?

• Archive a session
• Open command palette -> Browse archived sessions
• Open session dropdown
• Unarchive a session

Screenshots / recordings

2026-03-04.14-16-51.mp4

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

If you do not follow this template your PR will be automatically rejected.

[github-actions]

The following comment was made by an LLM, it may be inaccurate:

Potential Duplicate PRs Found

1. PR feat(app): view archived sessions & unarchive #15250 - "feat(app): view archived sessions & unarchive"

   • feat(app): view archived sessions & unarchive #15250
   • Reason: This PR appears to be directly related - it also adds the ability to view archived sessions and unarchive them, which is exactly what PR feat(app): unarchive sessions #16001 does.

2. PR feat: add session archive/unarchive support to TUI #13961 - "feat: add session archive/unarchive support to TUI"

   • feat: add session archive/unarchive support to TUI #13961
   • Reason: Also implements session archive/unarchive functionality, though potentially for a different interface (TUI vs app).

3. PR Feat/view archived sessions #6769 - "Feat/view archived sessions"

   • Feat/view archived sessions #6769
   • Reason: Earlier implementation of viewing archived sessions functionality.

Most likely duplicate: PR #15250 should be checked first, as it has the exact same feature set as the current PR #16001.

[neriousy]

Seems like the electron version of the app is messing with the pipeline

[Copilot]

Pull request overview

Adds end-to-end support for viewing archived sessions and unarchiving them, spanning the server update endpoint, SDK typing, app command palette entry, and UI affordances.

Changes:

• Allow time.archived to be set to null via session.update to unarchive a session (server + SDK typing).
• Add UI actions/labels for archived state + “Unarchive” in the session timeline dropdown.
• Add a command palette entry and dialog mode to browse archived sessions, plus i18n strings.

Reviewed changes

Copilot reviewed 25 out of 25 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
packages/sdk/js/src/v2/gen/types.gen.ts	Update SDK request typing to allow archived: null.
packages/sdk/js/src/v2/gen/sdk.gen.ts	Update SDK client method typing to allow archived: null.
packages/opencode/test/server/session-update.test.ts	Add server test covering unarchive via archived: null.
packages/opencode/src/session/index.ts	Allow null archived time and persist it to DB.
packages/opencode/src/server/routes/session.ts	Accept time.archived: null on PATCH /session/:sessionID.
packages/app/src/pages/session/message-timeline.tsx	Add “Archived” badge and unarchive action in session dropdown.
packages/app/src/pages/layout.tsx	Add command palette entry to browse archived sessions.
packages/app/src/components/dialog-select-file.tsx	Add archived-browsing mode and list archived sessions in the dialog.
packages/app/src/i18n/en.ts	Add strings for browsing archived sessions + archived/unarchive labels.
packages/app/src/i18n/de.ts	Add strings for browsing archived sessions + archived/unarchive labels.
packages/app/src/i18n/es.ts	Add strings for browsing archived sessions + archived/unarchive labels.
packages/app/src/i18n/fr.ts	Add strings for browsing archived sessions + archived/unarchive labels.
packages/app/src/i18n/ja.ts	Add strings for browsing archived sessions + archived/unarchive labels.
packages/app/src/i18n/ko.ts	Add strings for browsing archived sessions + archived/unarchive labels.
packages/app/src/i18n/no.ts	Add strings for browsing archived sessions + archived/unarchive labels.
packages/app/src/i18n/pl.ts	Add strings for browsing archived sessions + archived/unarchive labels.
packages/app/src/i18n/ru.ts	Add strings for browsing archived sessions + archived/unarchive labels.
packages/app/src/i18n/th.ts	Add strings for browsing archived sessions + archived/unarchive labels.
packages/app/src/i18n/tr.ts	Add strings for browsing archived sessions + archived/unarchive labels.
packages/app/src/i18n/zh.ts	Add strings for browsing archived sessions + archived/unarchive labels.
packages/app/src/i18n/zht.ts	Add strings for browsing archived sessions + archived/unarchive labels.
packages/app/src/i18n/da.ts	Add strings for browsing archived sessions + archived/unarchive labels.
packages/app/src/i18n/bs.ts	Add strings for browsing archived sessions + archived/unarchive labels.
packages/app/src/i18n/br.ts	Add strings for browsing archived sessions + archived/unarchive labels.
packages/app/src/i18n/ar.ts	Add strings for browsing archived sessions + archived/unarchive labels.

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