⚡ Bolt: Avoid per-frame allocations in KnowledgeGraph

[servathadi]

💡 What: Moved the nodeMap instantiation out of the simulate hot loop and cached it in a useRef updated via useEffect.
🎯 Why: In React requestAnimationFrame canvas renders, per-frame memory allocations (such as new Map()) cause significant garbage collection pauses.
📊 Impact: Reduces garbage collection pressure during graph simulation, leading to smoother animations.
🔬 Measurement: Verify smoother frame rates without intermittent GC spikes during graph visualization.

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PR created automatically by Jules for task 16607051373886487786 started by @servathadi

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[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-01T03:38:15.312914Z	9b18863	PR opened

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