fix: sanitize audio volume values

[han4wluc]

Summary

• sanitize route-graphics volume normalization so non-finite values fall back before clamping
• guard Web Audio AudioParam scheduling against NaN/Infinity values
• normalize direct audio/SFX volume inputs before playback scheduling
• bump package version to 1.23.4

Testing

• bunx vitest run spec/audio/audioStage.spec.js
• bunx prettier --check package.json src/AudioStage.js src/util/normalizeVolume.js spec/audio/audioStage.spec.js
• bunx oxlint src/AudioStage.js src/util/normalizeVolume.js spec/audio/audioStage.spec.js
• pre-push hook: bunx prettier --check src
• pre-push hook: vitest run