Procedural Drum Synthesis & DSP Refinement

[Pitrat-wav]

This PR implements a high-fidelity procedural drum synthesis engine based on the "Analog Drum Synthesis in Web Audio API" research.

Key improvements:

• TR-808/909 Models: Rewritten synthesis logic using native Tone.js/Web Audio API nodes to match physical circuit behavior (Bridged-T networks, VCO pitch sweeps, noise filtering).
• Velocity & Dynamics: All instruments now respond to velocity, and the sequencer applies subtle micro-randomization to hits to avoid the 'machine gun' effect.
• Master Saturation: Added a global DRIVE control to the drum machine, implementing the hyperbolic tangent soft-clipping formula from the DSP research.
• Improved UX: Default Euclidean patterns are now set to provide a classic techno/house foundation out of the box.
• Stability: Cleaned up audio routing and verified the entire codebase with TypeScript.

---

PR created automatically by Jules for task 13227823854731592268 started by @Pitrat-wav

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

New to Jules? Learn more at jules.google/docs.

---

For security, I will only act on instructions from the user who triggered this task.