feat(app): add pinned workspaces in sidebar

[anduimagui]

Issue for this PR

Closes #

Type of change

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

What does this PR do?

the desktop app makes it really easy to tinker with a specific feature or fix on a separate workspace / worktree - this adds basic workspace pinning in the sidebar to keep better track of what work is a priority.

• You can now toggle Pin / Unpin from the workspace menu.
• Pinned workspaces are shown first.
• There is now a simple visual separator between pinned and unpinned groups.
• Pin state is persisted per project root.
• Drag/reorder stays within the same group (pinned with pinned, unpinned with unpinned).

How did you verify your code works?

• Ran bun typecheck in packages/app
• Ran bun test:e2e -- projects/workspaces.spec.ts -g "can pin and unpin a workspace with persistence" --list
• Push pre-hook bun turbo typecheck passed

Screenshots / recordings

Checklist

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

[anduimagui]

I'm out of my depth on UI prioritization / details, so I intentionally kept the grouping UI minimal for now (just a basic separator) to keep this safe and easy to iterate on. keen to hear your thoughts @iamdavidhill @adamdotdevin

[rekram1-node]

Automated PR Cleanup

Thank you for contributing to opencode.

Due to the high volume of PRs from users and AI agents, we periodically close older PRs using automated criteria so maintainers can focus review time on the most active and community-supported contributions.

This PR was closed because it matched the following cleanup criteria:

• The PR was created more than 1 month ago
• The PR had fewer than 2 positive reactions
• Positive reactions are counted as thumbs-up, heart, celebration, or rocket reactions on the PR

PRs created within the last month are not affected by this cleanup.

If you believe this PR was closed incorrectly, or if you are still actively working on it, please leave a comment explaining why it should be reopened. A maintainer can review and reopen it if appropriate.

Thanks again for taking the time to contribute.