Speed up the app, run production build, remove chunk ink, start App.jsx split

Performance:
- Lazy-load pages, docx, and mammoth (initial JS 1,298 KB -> ~290 KB)
- Gzip responses and cache hashed assets for a year
- Memoize DrawCanvas strokes so ink isn't redrawn on every render
- Precompute whole-Bible search index and defer the query while typing
- Reload once if a lazy chunk is missing after a deploy

Deployment:
- setup.sh builds and runs one production server on APP_PORT (default
  5173); --dev keeps the old Vite dev setup
- Session cookie uses secure: 'auto' so login works behind any proxy

Chunk editor:
- Remove the Draw layout, Ink Notes panel, and ink in HTML export
  (existing inkStrokes data is left in saved projects)

Refactor:
- Move module-level helpers out of App.jsx into src/utils/*
- Extract Bible reader state and logic into hooks/useBibleReader

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

src/pages/ReaderPage.jsx

@@ -1,8 +1,10 @@
-import { useState, useEffect, useRef } from 'react';
+import { useState, useEffect, useRef, useMemo, useDeferredValue } from 'react';
 import { useApp } from '../context/AppContext.js';
 import { bookOptions, BookmarkIcon, CopyIcon } from '../utils/bibleUtils.jsx';
 import DrawCanvas from './DrawCanvas.jsx';
 
+const NO_STROKES = []; // stable fallback so DrawCanvas doesn't redraw every render
+
 export default function ReaderPage() {
   const {
     authStatus,
@@ -55,8 +57,27 @@ export default function ReaderPage() {
   const readerBook = bookOptions.find((b) => b.abbrev === readerBookAbbrev);
   const [readerDrawMode, setReaderDrawMode] = useState(false);
   const [readerWideLayout, setReaderWideLayout] = useState(() => localStorage.getItem('reader-wide') === '1');
-  const readerPageInkStrokes = readerInkByPage?.[`${readerBookAbbrev}_${readerChapter}`] ?? [];
+  const readerPageInkStrokes = readerInkByPage?.[`${readerBookAbbrev}_${readerChapter}`] ?? NO_STROKES;
   const [selectionPicker, setSelectionPicker] = useState(null);
+
+  // Whole-Bible search: lowercase the ~31k-verse index once (not per keystroke),
+  // and let typing stay responsive while results catch up via useDeferredValue.
+  const bibleIndex = bibleIndexStatus === 'ready' ? (_bibleIndexCacheRef.current.BSB ?? null) : null;
+  const bibleIndexLower = useMemo(
+    () => (bibleIndex ? bibleIndex.map((v) => v.text.toLowerCase()) : null),
+    [bibleIndex],
+  );
+  const deferredBibleQuery = useDeferredValue(
+    readerSearchActive && readerSearchScope === 'bible' ? readerSearch.trim().toLowerCase() : '',
+  );
+  const bibleMatches = useMemo(() => {
+    if (!bibleIndex || !deferredBibleQuery) return [];
+    const out = [];
+    for (let i = 0; i < bibleIndex.length; i++) {
+      if (bibleIndexLower[i].includes(deferredBibleQuery)) out.push(bibleIndex[i]);
+    }
+    return out;
+  }, [bibleIndex, bibleIndexLower, deferredBibleQuery]);
   const swipeTouchRef = useRef(null);
 
   const [toolbarVisible, setToolbarVisible] = useState(true);
@@ -444,10 +465,9 @@ export default function ReaderPage() {
               <p className="text-sm text-rose-600">Couldn't load the full Bible for search. <button type="button" onClick={loadBibleIndex} className="underline">Try again</button></p>
             )}
             {bibleIndexStatus === 'ready' && (() => {
-              const q = readerSearch.trim().toLowerCase();
+              const q = deferredBibleQuery;
               if (!q) return <p className="text-sm text-slate-500">Type at least a word to search all 66 books.</p>;
-              const index = _bibleIndexCacheRef.current.BSB ?? [];
-              const matches = index.filter((v) => v.text.toLowerCase().includes(q));
+              const matches = bibleMatches;
               if (matches.length === 0) return <p className="text-sm text-slate-500">No verses match "{readerSearch}".</p>;
               const shown = matches.slice(0, 100);
               return (