Visual Identity Pass:
- Smooth phase transition overlay with staggered fade-in animation and particle burst
- Building purchase confetti at x10 milestones (gold + green particles)
- Animated resource counters (pulse on gain, shake on loss) - already existed, verified working
Ending Cinematic Enhancement:
- Beacon ending: fade-to-black transition, staggered text reveal, golden light rays,
continuous floating particles, expanded stat summary, 'Play Again' button
- Drift ending: glitch animation on title, fade-in overlay, stat summary with
buildings/projects/clicks/time/phase, dramatic line-by-line log reveal
Accessibility (#57):
- Sound mute toggle button (M key) with localStorage persistence
- High contrast mode toggle (C key) with CSS variable overrides
- Both toggles in fixed bottom-left toolbar with aria-labels
- Keyboard shortcuts M and C added, help overlay updated
- Drift ending button changed to 'Play AGAIN' with proper aria-label
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