Polish tetris_matrix with reactive combo visuals

[smcga]

Motivation

• Make the tetris_matrix effect feel more impressive and responsive by adding combo-driven visual energy and subtle motion without changing gameplay/timeline behavior.
• Keep parameter surface and defaults compatible (speed, level, glow, contrast, ghost, seed) while improving visual feedback tied to audio/line clears.

Description

• Add a compact energy model and helper getRecentLineBursts and compute comboPulse, burstEnergy, and intensity to drive visuals.
• Introduce subtle screen shake via ctx.translate(shakeX, shakeY) and strengthen reactive screen glow by folding comboPulse and intensity into screenGlow.
• Add row-pressure highlights, active-piece trail accents, and a HUD status lamp (HOT/SYNC/CALM) driven by comboPulse and audio.beat.
• Add a vignette pass and scanline/tint tweaks to increase perceived impact; update src/renderer/effects/tetrisMatrixEffect.ts, update effect manifest and README descriptions, and regenerate docs/effects.md.
• Update unit tests (src/renderer/effects/tetrisMatrixEffect.test.ts) to mock ctx.translate and assert the shake translation and HUD label rendering.

Testing

• Ran unit tests: npm run test -- src/renderer/effects/tetrisMatrixEffect.test.ts src/renderer/debug/effectDebug.test.ts, and all tests passed (48 tests total).
• Regenerated effect docs with npm run docs:effects and ran docs checks with npm run docs:check, and both checks passed.

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Codex Task

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Project	Deployment	Actions	Updated (UTC)
codexperimental	Ready	Preview, Comment	Apr 8, 2026 1:19am