New component that displays problem evolution as an Apple Time Machine-style
stack of cards:
- Current problem is prominent (full opacity, full scale) at the front
- Previous problems are stacked behind with perspective depth
- Each layer: translateZ, scale down, fade opacity
- Clicking past layers triggers navigation to rewind
- Smooth animation when new entries are added
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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