feat: dashboard v2.1 glassmorphism + graph decomposition + fix flaky macOS vector test

Dashboard v2.1 "Nuclear" upgrade:
- Dark glassmorphism UI system (4-tier glass utilities, ambient orbs, nav glow)
- Graph3D decomposed from 806-line monolith into 10 focused modules
- Custom GLSL shaders (nebula FBM background, chromatic aberration, film grain, vignette)
- Enhanced dream mode with smooth 2s lerped transitions and aurora cycling
- Cognitive pipeline visualizer (7-stage search cascade animation)
- Temporal playback slider (scrub through memory evolution over time)
- Bioluminescent color palette for node types and events

Fix flaky CI test on macOS:
- vector::tests::test_add_and_search used near-identical test vectors (additive phase shift)
- Changed to multiplicative frequency so each seed produces a distinct vector

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

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