- Add transcript panel with turn-by-turn summaries generated from replay events
- Each turn shows: player moves, combat, deaths, captures, energy collection, spawns, win probability
- Add 'T' key shortcut to toggle transcript panel
- Panel supports three view modes: All Turns, ±10 Turns from Current, Recent 20 Turns
- Click on transcript entry to jump to that turn
- Current turn is highlighted in transcript with smooth scroll
- Panel content is selectable/copyable for screen reader users
- Transcript generation logic already existed in replay-viewer.ts; this adds the UI
- Transcript button slides in from right side of screen
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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