Replace deprecated ScriptProcessorNode with AudioWorklet#566
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Migrate audio output from the deprecated ScriptProcessorNode API to the modern AudioWorklet API, which runs audio processing on a dedicated thread for better performance and fewer glitches. - Add audio-worklet-processor.js with circular Float32Array ring buffer (8192 samples, ~170ms at 48kHz) for GC-free real-time audio - Rewrite speakers.js to use AudioWorkletNode with MessagePort-based sample delivery (batched in groups of 128, matching render quantum) - Inline worklet code at build time via ?raw import (works with both webpack's asset/source and Vite's native ?raw support) - Add flush() method to send partial sample batches after each frame - Simplify buffer underrun callback (worklet buffer size not queryable from main thread) - Remove ring-buffer.js (replaced by worklet's internal circular buffer) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Replaces the deprecated ScriptProcessorNode with the modern AudioWorklet API in the web UI, eliminating main-thread audio processing for lower latency and fewer glitches.
The worklet processor is stored as a real JS file for proper tooling support but imported as a string at build time via Vite's
?rawsuffix and loaded via Blob URL. Audio samples are batched (128 at a time) and sent to the worklet via MessagePort, avoiding the need for SharedArrayBuffer and its COOP/COEP header requirements.Also removes the
ringbufferjsdependency.Closes #386