Adds a collapsible Interlinear section beneath the Scripture text
(stacked and split layouts) showing each original-language word with
its BSB gloss, transliteration, parsing, and Strong's number on hover.
Data is generated offline from the Berean Standard Bible translation
tables via scripts/build-interlinear.mjs into per-book JSON files.
Sets up Vitest + React Testing Library with jsdom, exports utility functions
for unit testing, and adds 78 tests covering pure functions and component
integration flows (chapter loading, chunk management, navigation, Greek word
lookup).
https://claude.ai/code/session_01C4T3bYHR2svLq7JVcxKJ6Y
nmemmert