Self-healing UI: proactive issue detection and auto-fix queue

[michaeloboyle]

Description

Implement proactive mode where the bridge continuously monitors the app and queues fixes without manual __claude.fix() invocation.

Requirements

• MutationObserver watches for layout shifts (CLS > 0.1)
• Console error listener auto-captures context on new errors
• PerformanceObserver flags slow renders (>100ms paint)
• Network failure listener queues API-side fix suggestions
• Fix queue with approve/reject UI (could integrate with claude-remote dashboard)

Human Role

Review and approve a queue of fixes, not detect issues. Shifts from "detect + describe + fix" to "approve/reject".

Depends On

• ADR-0006: DevTools Bridge integration #6 (DevTools Bridge integration) — Done
• Approval graduation logic from telemetry (track success rate per issue class)

References

• PKM ADR-0013 Benchmarks: Integration Mode 2 (Self-Healing UI)
• PKM ADR-0007: Always-On Agent Fleet (approval lane graduation)