Redesign the Reader; add ESV

New reading surface with paper/sepia/dark themes, slim top and bottom bars,
and sheets for navigation, search, settings, audio and per-verse study tools.
Plan progress is built into the reader. Page-flip mode removed. ESV added via
the server-side proxy (ESV_API_KEY).

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

src/hooks/useBibleReader.js

@@ -7,6 +7,8 @@ import { BIBLE_IDB_TTL, getBibleIndexFromIDB, saveBibleIndexToIDB } from '../uti
 
 export const READER_TRANSLATIONS = [
   { id: 'BSB', name: 'Berean Standard Bible' },
+  { id: 'ESV', name: 'English Standard Version', licensed: true,
+    notice: 'Scripture quotations are from the ESV® Bible (The Holy Bible, English Standard Version®), © 2001 by Crossway, a publishing ministry of Good News Publishers. Used by permission. All rights reserved.' },
   { id: 'NET', name: 'NET Bible', helloao: 'eng_net',
     notice: 'Scripture quoted by permission. Quotations designated (NET) are from the NET Bible® copyright ©1996-2017 by Biblical Studies Press, L.L.C. http://netbible.com All rights reserved.' },
   { id: 'NLT', name: 'New Living Translation', licensed: true,
@@ -29,6 +31,16 @@ export function useBibleReader(currentPage) {
     } catch { return 'BSB'; }
   });
   const [readerCopyright, setReaderCopyright] = useState('');
+  const [readerTheme, setReaderThemeState] = useState(() => {
+    try {
+      const saved = localStorage.getItem('reader-theme');
+      return ['paper', 'sepia', 'dark'].includes(saved) ? saved : 'paper';
+    } catch { return 'paper'; }
+  });
+  // 'flow' = verses run together like a printed page; 'verses' = one verse per line
+  const [readerLayout, setReaderLayoutState] = useState(() => {
+    try { return localStorage.getItem('reader-layout') === 'verses' ? 'verses' : 'flow'; } catch { return 'flow'; }
+  });
   const [readerVerses, setReaderVerses] = useState([]);
   const [readerTotalChapters, setReaderTotalChapters] = useState(1);
   const [readerLoading, setReaderLoading] = useState(false);
@@ -108,6 +120,16 @@ export function useBibleReader(currentPage) {
     }
   };
 
+  const setReaderTheme = (id) => {
+    setReaderThemeState(id);
+    try { localStorage.setItem('reader-theme', id); } catch {}
+  };
+
+  const setReaderLayout = (id) => {
+    setReaderLayoutState(id);
+    try { localStorage.setItem('reader-layout', id); } catch {}
+  };
+
   const setReaderTranslation = (id) => {
     setReaderTranslationState(id);
     try { localStorage.setItem('reader-translation', id); } catch {}
@@ -336,6 +358,8 @@ export function useBibleReader(currentPage) {
     readerChapter, setReaderChapter,
     readerTranslation, setReaderTranslation,
     readerCopyright,
+    readerTheme, setReaderTheme,
+    readerLayout, setReaderLayout,
     readerVerses,
     readerTotalChapters,
     readerLoading,