⚡ Bolt: Optimize bulk selection by batching Published array mutations

[acebytes]

💡 What: Replaced element-wise mutation in @Published arrays (scanResults, nodeModulesItems) with functional .map reassignments.
🎯 Why: Mutating an element inside a @Published array triggers a UI notification on every iteration. This optimizes bulk selection operations by batching updates into a single notification.
📊 Impact: O(1) UI updates per mass-selection operation instead of O(N) updates, significantly reducing main thread blockages and layout recalculations.
🔬 Measurement: Observe CPU usage and UI responsiveness during "Select All" actions on large result sets.

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PR created automatically by Jules for task 6665893912144087929 started by @acebytes

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