fix: improve UI responsiveness with large remote hosts files#242

Merged

2ndalpha merged 12 commits intomasterfrom

fix/large-remote-file-performance

Mar 1, 2026

Commits on Mar 1, 2026

fix: prevent UI freeze when loading large remote hosts files
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merge: incorporate master (refreshToken parameter in HostsRowView)
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fix: prevent UI lockup when rapidly switching between hosts files
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test: add comprehensive performance tests for file switching
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fix: eliminate O(n) string comparison on every SwiftUI re-render
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fix: defer first syntax highlighting chunk to prevent main thread blocking
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fix: reduce main thread blocking from download lifecycle
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fix: remove onDrag from sidebar rows that was blocking click-to-select
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fix: restore explicit UTType import and add dscacheutil failure logging
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fix: relax fullEditorRendering test threshold for CI Intel runners
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fix: reduce fullEditorRendering test payload to avoid CI timeout
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fix: reduce test content from 16K-30K to 5K lines for CI stability
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