Land upstream PR #1634 by @maxmilian, commit
8d398a92e30c9df27196bc90833efd674384569d.
Path-only detection classifies .h files as c, so preloading previously
covered c and cpp but missed objc selected by content-aware detection.
Preload objc alongside cpp whenever c is present. Full indexing and
changed-file reindexing now share preloadLanguagesForFiles().
Retain all four upstream unit tests and place the existing #1628 changelog
entry under Unreleased / Fixes / Symbols, tests and the viewer.
Verified fail -> pass on Linux with the reporter's repro.h as the only
source file, without a .m or .mm grammar seed. Before: Objective-C parser
initialization failure, 0 nodes, index state failed. After: Indexed 1 files,
2 nodes, 1 edge, index state complete; node CGRepro finds the class and
errors.log is absent.
Validation: npx tsc && npm run copy-assets passed; rebuilt CLI is executable.
npx vitest run __tests__/preload-languages.test.ts: 4 tests passed.
Co-authored-by: Colby McHenry <colbymchenry@users.noreply.github.com>
Co-authored-by: Max Hsu <maxmilian@gmail.com>
