The tray icon follows the drive's phase (synced, syncing, paused,
offline, needs attention) and reports NeedsAttention while changes keep
failing. The menu gains an issues item that opens the Sync page, Sign In
when signed out, Hide Tray Icon (persisted as tray_hidden) and Stop
Proton Drive, which pdfs-app confirms via --confirm-stop. A second
pdfs-app launch raises the running window.
