- terminal-session.ts: track SessionStatus (connecting/connected/reconnecting/
exited) + onStatus callback; FIX: wire onTitleChange (onTitle was in opts but
never bound — auto-title was dead)
- tabs.ts: per-tab status dot (color = connection state), unread flag set on
background output + cleared on activate, HTML5 drag-to-reorder (preserves
active tab, persisted)
- style.css: .tab-dot colors, .unread ring, .dragging/.drag-over feedback
- Browser-verified: green dot connected, unread ring after bg output, reorder
AAA|BBB→BBB|AAA persists across reload. 191 tests green, typechecks + build ok.
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