Fix large-PDF tree and XREF rendering performance#6

Merged

unidoc-anom merged 8 commits into

devfrom

fix/tree-render-perf

Jul 23, 2026

Commits on Jul 22, 2026

perf(tree): stabilize react-arborist props to avoid full-model rebuild per render
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perf(xref): defer fetch to tab activation and virtualize rows
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fix(xref): latch activation so toggling the tab mid-fetch can't start a duplicate
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fix(xref): re-latch fetch on tabId change so switching docs while active refetches
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fix(xref): keep keyboard row navigation working across the virtualized window
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perf(tree): deliver loading/flash via context so react-arborist skips model rebuilds
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fix(xref): derive activation gate from latched tabId so a doc switch can't eager-fetch
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fix(xref): reset activation latch render-phase so returning to a document can't eager-fetch
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