missingRendererAssets only checked the module refs index.html itself names
(<script type=module> + modulepreload), so a torn install whose boot-critical
files were intact but whose lazy chunks were gone passed the generation check
and died minutes later on the first React.lazy() route with 'Failed to fetch
dynamically imported module' (#93479: syntax-diff-*, shiki-*, mermaid-embed-*).
Walk the generation's module graph: for every present JS chunk, parse its
inline __vite__mapDeps filename table (the lazy-import manifest Vite bakes
into each chunk) and check those files too, transitively and cycle-safe.
resolveRendererIndex now skips a lazy-chunk-torn candidate in favor of the
intact copy instead of shipping a delayed crash.
Tests cover the mapDeps parser (definition table vs index-only call sites,
CDN refs), the exact #93479 tear shape, transitive/cyclic walks, and the
torn-vs-intact preference end to end.
renderer-bundle.ts shipped in #85887 as pure/injectable but had no unit
coverage. Lock the contract that heals a torn self-update: the boot loader
must prefer a complete generation and only report a repair when every copy
is torn.
parseModuleAssetRefs: module scripts + modulepreload only (not stylesheets
or classic scripts), CDN/absolute refs dropped, ./ and query/hash stripped.
missingRendererAssets: intact -> [], torn -> the dangling chunk(s),
per-copy dir-relative existence (the split app.asar vs app.asar.unpacked
case), and an unreadable/module-free index is not treated as torn.
Teknium