⚡ Bolt: Optimize selection state evaluation to prevent unnecessary iterations

[acebytes]

💡 What: Updated hasSelection to use .contains(where:) and selectedSize to use .lazy.filter.
🎯 Why: Eager filtering creates temporary arrays and causes memory churn during UI rerenders. Reducing the nodeModulesItems just to check if size > 0 requires O(N) evaluation. Using contains(where:) provides an O(1) early-exit.
📊 Impact: Prevents full O(N) traversal and intermediate array allocations every time hasSelection or selectedSize are evaluated.
🔬 Measurement: Verify tests pass and the UI correctly reflects selection state without performance degradation.

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PR created automatically by Jules for task 6097637921170291525 started by @acebytes

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