fix(graph): prevent e.graphData crash on unmount when navigating to notes

[VariableThe]

Summary

Fixes TypeError e.graphData is not a function when clicking a node in Graph View to navigate to a note.

Root Cause & Fix

When clicking a note in Graph View, React unmounts the component tree. During unmount, react-force-graph-3d cleans up and destroys internal methods on the ref instance (fgRef.current) before GraphView's cleanup hook executes. When the cleanup hook attempted to invoke fg.graphData(), it threw a TypeError.

• Added defensive verification (typeof fg.graphData === 'function') before calling ref methods.
• Kept a synchronized graphDataRef to safely fallback to the computed node positions during cleanup.
• Replaced active setInterval in GraphView.tsx with a chained setTimeout pattern to adhere to project rules.

Verification

• npm run lint passed
• npx vitest run passed
• Documented in CHANGELOG.md and AUDIT_LOG.md

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: e2b07dfa-3536-48c5-8c08-10b9671a6322

📥 Commits

Reviewing files that changed from the base of the PR and between 0a49515 and 22316de.

📒 Files selected for processing (3)

• AUDIT_LOG.md
• CHANGELOG.md
• src/GraphView.tsx

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/graph-data-undefined

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