feat(web-synth-9x1a): Implement Phase 11 enhancements (Clipping, Auto-Pan, Bypasses)

[kkd16]

This pull request introduces Phase 11 of the expansion plan for the web-synth-9x1a project.

Key additions:

• Clipping Indicator: Added a visual clipping indicator to the Master Output node using an AnalyserNode in the audio core.
• Auto-Pan: Added an internal LFO to the Panning Node, allowing for automatic panning synchronized with adjustable rate and depth.
• Bypass for Reverb: Added a functional bypass toggle to the Reverb Node, routing audio via a dry path when bypassed.
• Reset to Default: Added "Reset to Default" convenience buttons to Delay, Distortion, Filter, and Reverb nodes.

All new components have been integrated into the UI and wired through the global store state to ensure consistency across the application. Verification scripts have successfully verified compilation and visual additions.

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PR created automatically by Jules for task 18136476798517699807 started by @kkd16

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[github-actions]

✅ Scope + lint + build passed.