ClaudeSessionHost replaces its bespoke tab strip / add button /
close handler with a MultitabPane<_Session> in keepAlive mode.
The primary tab is seeded as non-closeable and non-reorderable
per D-41; secondaries spawn via the existing addSecondary()
entry point and gain drag-to-reorder for free.
Drops ~100 lines of custom _TabRow / _Tab / _AddButton code in
favour of the shared widget. Behaviour is preserved: primary
persists across clide restarts, secondaries can be closed, and
PTY state survives tab switches because IndexedStack keeps every
ClaudePane mounted.
Co-Authored-By: Claude <noreply@anthropic.com>
jpmschweitzerandClaude
71b21e1974