v0.2.0 — global pin tray

What's new

Top pin (⌃⌃) is now a real 'above all workspaces' pin.

• The pinned session moves into a Pinned tray at the very top of the sidebar, floating above every workspace group — its in-group row is hidden.
• Click a tray row to open that session; ✕ un-pins from the tray.
• Global pins are display-level: no host/workspace order is touched at all, so un-pinning is side-effect free.
• Multiple sessions can be pinned: local pins stack at the top of their workspace, global pins stack in the tray (most recent first).
• Legacy top pins from v0.1.x (which moved the workspace to the front) are rolled back automatically when you un-pin them.

Unchanged from v0.1.0: workspace-level pin (📌) with durable order + exact multi-pin-safe restore, whole-workspace pin, sort-mode handling, zero dependencies.