Summary

The workspace list in the sidebar is currently sorted in the order workspaces were added. There is no way to reorder them without removing and re-adding.

Proposed behaviour

Add drag-to-reorder support to the workspace list so users can arrange their most-used workspaces at the top. The order should persist to workspaces.json.

Implementation notes

• Drag handle on each workspace row (HTML5 drag-and-drop or pointer events)
• Persist order to workspaces.json via an /api/workspaces/reorder endpoint (or by re-saving the full list)
• Reorder should not affect the active workspace selection

Tracked in ROADMAP.md as "Workspace reorder (drag) (Wave 2)".