Procedural Analog Drum Synthesis Overhaul

[Pitrat-wav]

This PR overhauls the drum synthesis engine to align with the provided "Analog Drum Synthesis in Web Audio API" research. Key highlights include:

1. TR-808 Kick: Implemented a bridged-T network emulation with a sine oscillator, aggressive pitch sweep, and a two-stage VCA envelope to capture authentic diode damping.
2. TR-909 Kick: Features a triangle wave body with soft-clipping, dedicated noise/pulse click layers, and a deep pitch envelope.
3. Snare Models: TR-808 uses parallel membrane modes (~238Hz/476Hz) and high-passed white noise. TR-909 utilizes triangle oscillators and an authentic 15-bit LFSR (Linear Feedback Shift Register) noise generator for digital texture.
4. Hi-Hats & Cymbals: Faithfully recreated the 6-oscillator Schmitt trigger matrix with exact hardware frequencies and parallel bandpass filtering.
5. DSP Utilities: Centralized noise generation (cached buffers) and cents-based pitch drift formulas.
6. Performance & Stability: Added early-exit logic for zero-velocity triggers, explicit node disposal to prevent memory leaks, and bulk parameter synchronization between the store and audio engine.

The changes were verified to pass TypeScript checks and visual/rhythmic verification via Playwright.

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PR created automatically by Jules for task 5515558491695036899 started by @Pitrat-wav

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