Reader: whole-Bible search in every translation

BSB and NET are indexed in the browser; ESV, NLT, CSB and NASB are searched
through a server proxy (keys stay server-side). Results page in 25 at a time
and jump to the verse. Also fixes a stray trailing comma in CSB chapter text.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/pages/ReaderPage.test.jsx

@@ -18,7 +18,7 @@ const ctx = {
   readerSearch: '', setReaderSearch: noop, setReaderSearchActive: noop,
   readerSearchScope: 'chapter', setReaderSearchScope: noop,
   readerAudioState: { status: 'idle' }, audioProgress: { currentTime: 0, duration: 0 },
-  bibleIndexStatus: 'idle', audioNarrator: 'david', setAudioNarrator: noop,
+  bibleIndexStatusFor: () => 'idle', audioNarrator: 'david', setAudioNarrator: noop,
   _bibleIndexCacheRef: { current: {} },
   readerGoToPreviousChapter: noop, readerGoToNextChapter: noop, jumpToReaderVerse: noop,
   toggleReaderBookmark: noop, cycleBookmarkColor: noop, loadReaderCrossRefs: noop, loadBibleIndex: noop,