fix(core): manual compact updates sessions time.updated

[neriousy]

Issue for this PR

Closes #16392

Type of change

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

What does this PR do?

Manual session compaction did not update
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How did you verify your code works?

Create session A, then create newer session B.
Confirm B is above A in the session list.
Open A and run /compact.
Go back to the session list.
A often does not move to the top, and its updated time does not change.

Screenshots / recordings

If this is a UI change, please include a screenshot or recording.

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]

Hey! Your PR title Opencode/hidden mountain doesn't follow conventional commit format.

Please update it to start with one of:

• feat: or feat(scope): new feature
• fix: or fix(scope): bug fix
• docs: or docs(scope): documentation changes
• chore: or chore(scope): maintenance tasks
• refactor: or refactor(scope): code refactoring
• test: or test(scope): adding or updating tests

Where scope is the package name (e.g., app, desktop, opencode).

See CONTRIBUTING.md for details.

[github-actions]

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

Based on my search, I found one potentially related PR:

PR #16273 - "fix(tui): pass roots:true in session list bootstrap to fix child session dilution"
#16273

This PR is related to session list behavior and updates, which could be relevant to the issue in PR #16394 where the session list doesn't properly reflect updated times after compaction.

The searches for "session compaction," "compact updated time," and the specific issue #16392 mostly return results about general compaction fixes but not other PRs directly addressing the same bug about manual session compaction not updating the session order and timestamps.

[github-actions]

Thanks for updating your PR! It now meets our contributing guidelines. 👍

[Copilot]

Pull request overview

Fixes a bug where manually triggering session compaction/summarization updates session messages but does not bump the session’s time.updated, which prevents the session from reordering correctly in session lists.

Changes:

• Update the POST /session/:sessionID/summarize route to explicitly bump the session’s updated timestamp.
• Add a server-level regression test asserting that manual summarization bumps time.updated and reorders Session.list.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
packages/opencode/src/server/routes/session.ts	Ensures manual summarize/compaction updates time.updated via Session.touch(sessionID).
packages/opencode/test/server/session-list.test.ts	Adds coverage that manual summarize bumps time.updated and moves the session to the top of Session.list.

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