AnimatedSwitcher cross-fades exiting + entering glyphs for 200ms; with a
fixed per-status ValueKey, flipping a status back (running -> success ->
running within the fade, e.g. two bound Claude panes) left two children
keyed 'running' in the Stack -> "Duplicate keys found" + a cascade of
follow-on framework errors. Make the indicator stateful and fold a
per-change sequence counter into the key, so each appearance is unique and
a same-status rebuild still doesn't re-animate. Regression test flips
status mid-cross-fade with real animations.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jpmschweitzerandClaude Opus 4.8
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