release: v3.0.0 — dual-layer display, evidence-based pipeline cleanup

Breaking changes:
- MisalignmentRisk.gaming removed (r=0.998 clone of Desperation)
- computeRisk signature extended with uncannyCalm parameter
- Display output redesigned: emoji + bars, 3 granularity levels

Highlights:
- 16-stage pipeline with dual-layer surface/depth display
- Absence score unit mismatch fixed (CRITICAL: 2/5 channels were disabled)
- Shared color helpers extracted to src/color.ts
- PRE/POST divergence v2 (color-only), Coercion v3 (multiplicative)
- Cross-model stress validation: Opus/Sonnet/Haiku, 309 unit tests

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>