Procedural Drum Synthesis based on Deep DSP Analysis

[Pitrat-wav]

This PR implements a comprehensive procedural drum synthesis engine for the Telegram Mini App, strictly following the provided deep DSP research on Roland TR-808 and TR-909 architectures.

Key technical highlights:

• TR-808 Kick: Bridged-T network emulation with a two-stage frequency sweep and a dual-stage amplitude envelope (20ms initial damping) to simulate diode behavior.
• TR-909 Kick: Triangle wave body with a deep frequency sweep (4.7x multiplier) and a dedicated noise/pulse click layer with randomized start offsets.
• 808 Hi-Hats & Cowbell: Schmitt trigger matrix emulation using 6 square wave oscillators mixed through parallel bandpass and highpass filters.
• Snares: Dual-mode sine (808) and triangle (909) synthesis with authentic 15-bit LFSR noise for the 909 'Snappy' component.
• Analog Drift: Per-trigger micro-randomization of pitch, phase, decay, and filter cutoff to eliminate the "machine-gun" effect and add organic movement.
• Saturation: Custom soft-clipping curves applied to 909 components and the master drum bus.
• Telegram UX: Integrated impactOccurred haptic feedback for both UI interactions (randomization) and rhythmic immersion (downbeats).
• Architecture: Clean 'create-and-dispose' pattern for all Web Audio nodes to ensure high performance and zero memory leaks.

The implementation was verified using Playwright screenshots and production builds, ensuring full compatibility with the existing sequencer and Telegram theme.

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PR created automatically by Jules for task 4435414984017047645 started by @Pitrat-wav

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