Surface active workspace in titlebar

[majormel]

Summary

• Adds a prominent top toolbar workspace picker that shows the active workspace name across the main window.
• Reuses the existing workspace picker switching behavior and adds a direct Create Workspace... action from the new top control.
• Fixes the create-workspace sheet flow so a newly created workspace is switched to once instead of being created twice.

Screenshots

Zero-workspace state

Active workspace and chat title

Workspace switcher

Why

Issue #411 calls out that the active workspace identity is easy to miss when users switch between multiple workspaces. The top toolbar now keeps that identity visible at a glance and provides quick switch/create/manage actions from the same place.

Validation

• make dev-format
• make dev-swift-build PRODUCT=RepoPrompt
• make dev-lint
• .agents/skills/rpce-contribution-check/scripts/preflight.sh commit
• .agents/skills/rpce-contribution-check/scripts/preflight.sh push

Closes #411

[provencher]

Add a screenshot for big visual changes like this

[baron]

The new control does not visibly render the active workspace name required by #411. ActiveWorkspaceToolbarPicker computes workspaceTitle, but its visible label renders Text(title) (the Agent chat title); workspaceTitle is used only for accessibility. Please render the workspace name visibly or define an unmistakable composite presentation, add the requested screenshot and focused switching/zero/one-workspace coverage, then resolve conflicts and rerun CI.

[morluto]

Audit disposition — merge candidate after UI smoke (2026-08-14)

Keeping the active workspace visible in the titlebar is useful, and the create flow appears to fix the duplicate-create/switch behavior by switching to the object that was actually created. I did not find a code-level blocker in the focused change.

Before merge, refresh/exact-head CI and manually verify the zero-workspace state, long names in a narrow titlebar, rapid workspace switches, multi-window independence, and that Create Workspace creates and activates exactly one record.

[morluto]

Deep-review assessment — 2026-08-14

Disposition: merge candidate after final UI/current-head checks. Keeping the active workspace visible in the titlebar addresses the stated discoverability problem, and switching to the already-created workspace object fixes the duplicate-create flow without introducing a second creation authority. I did not find a structural blocker.

Please validate long workspace names and narrow windows, rapid cross-window workspace switching, zero-workspace state, and that Create Workspace produces and activates exactly one workspace under repeated/slow sheet completion. With exact-head CI and a non-author review, this is an appropriately scoped UI change.