⚡ Bolt: Replace Map iterator array conversions with for...of loops

[meet447]

💡 What: Replaced [...clipsRef.current.keys()] and Array.from(clipsRef.current.keys()) with for...of loops iterating directly on the Map iterator within setExpression, startLipSync, and stopLipSync in src/hooks/useVRM.ts.

🎯 Why: To prevent O(N) memory allocations and reduce Garbage Collection (GC) pressure in code paths executed frequently (during animation blending and lip syncing). Converting iterators to arrays just to perform an early-exit .find() lookup is an anti-pattern that slows down the JavaScript engine by allocating memory unnecessarily.

📊 Impact: Expected O(1) memory overhead and slightly lower latency on lip-sync updates / expression changes because it completely eliminates intermediate array allocations and can early exit for...of loops immediately.

🔬 Measurement: Verify by running memory profiling or simply checking application responsiveness during talking/expression sequences with high numbers of animations. Existing tests pass and application builds successfully.

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PR created automatically by Jules for task 3225223189127586751 started by @meet447

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