Harden sync and security; add IQ Bible, templates, password reset, backups

Sync and data safety
- Autosave flushes on leaving a study or the tab; storage-full errors are reported
- Unsynced studies, deletes and ink are queued and retried when back online
- Deletes propagate across devices (with a "Keep it" undo) and no longer resurrect
- Server assigns study versions (no client-clock conflicts); "Combine both"
  merges a conflicted study chunk by chunk
- Reading-plan progress made offline is merged, not overwritten; plans, ink and
  marks are cleared from the device on sign-out

Security
- Block SSRF through the ntfy reminder URL; failure-only rate limiting per IP and
  account; constant-time login; TOTP replay protection; input validation;
  SESSION_SECRET required in production; admin user delete fixed
- Forgot password: one-time code sent to the account's ntfy topic

Features
- IQ Bible proxy (route allow-list, text-only caching per its terms): more
  commentaries, lexicons, study aids, daily verse and devotional, plan calendar
  export, narrations, podcast background
- Study templates, reading-plan catch-up, account export, daily database snapshots

Tests and tooling
- ESLint config; App tests split into src/test; tests for sync queues, library
  hook, merge, templates, IQ Bible UI and reset form

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

src/components/reader/VerseSheet.jsx

@@ -9,12 +9,18 @@ import { READER_TRANSLATIONS, fetchChapter } from '../../utils/bibleText.js';
 import { diffVerses, differenceLabel } from '../../utils/textDiff.js';
 import { DiffText } from './DiffText.jsx';
 import { HIGHLIGHT_COLORS, colorTitle } from '../../utils/highlightColors.js';
+import { useIqAvailable } from '../../hooks/useIq.js';
+import IqLexicon from '../iq/IqLexicon.jsx';
+import IqStudyAids from '../iq/IqStudyAids.jsx';
 
-const TABS = [['commentary', 'Commentary'], ['compare', 'Compare'], ['original', 'Original'], ['refs', 'Cross-refs'], ['people', 'People & places']];
+const BASE_TABS = [['commentary', 'Commentary'], ['compare', 'Compare'], ['original', 'Original'], ['refs', 'Cross-refs'], ['people', 'People & places']];
 
 function OriginalTab({ words }) {
+  const iq = useIqAvailable();
+  const [lookup, setLookup] = useState(null); // the Strong's number open in the lexicon panel
   if (!words) return <p className="text-sm text-[var(--r-sub)]">No original-language data for this verse.</p>;
   return (
+    <>
     <div className="flex flex-wrap gap-2">
       {words.map((w, i) => {
         const isHebrew = w.s?.startsWith('H');
@@ -31,10 +37,16 @@ function OriginalTab({ words }) {
                 className="mt-1.5 rounded-lg bg-[var(--r-bar)] px-2 py-0.5 text-[11px] hover:bg-black/5"
                 title={`Pronounce in ${isHebrew ? 'Hebrew' : 'Greek'}`}>Speak</button>
             )}
+            {iq && w.s && (
+              <button type="button" onClick={() => setLookup((cur) => (cur === w.s ? null : w.s))} aria-pressed={lookup === w.s}
+                className="mt-1.5 ml-1 rounded-lg bg-[var(--r-bar)] px-2 py-0.5 text-[11px] hover:bg-black/5" title="Look this word up in the lexicons">Lexicon</button>
+            )}
           </div>
         );
       })}
     </div>
+    {lookup && <IqLexicon strongs={lookup} onClose={() => setLookup(null)} />}
+    </>
   );
 }
 
@@ -144,6 +156,8 @@ export default function VerseSheet({
   bookmarkColor, onToggleBookmark, onCycleColor, onJump, onClose, request,
   verseHighlights = [], colorLabels = {}, onHighlightVerse, onClearVerseHighlights, panelRef, resizeHandle,
 }) {
+  const iqOn = useIqAvailable();
+  const TABS = iqOn ? [...BASE_TABS, ['aids', 'Study aids']] : BASE_TABS;
   const [tab, setTab] = useState('commentary');
   const [copied, setCopied] = useState(false);
   const [preview, setPreview] = useState(null); // the cross-reference being read in the panel
@@ -230,6 +244,7 @@ export default function VerseSheet({
           preview={preview && <RefPreview refItem={preview} translation={translation} onOpen={onJump} onClose={() => setPreview(null)} />} />
       )}
       {tab === 'people' && <PeoplePlacesTab book={book} chapter={chapter} verse={verse.number} />}
+      {tab === 'aids' && iqOn && <IqStudyAids book={book} chapter={chapter} verse={verse.number} />}
     </Sheet>
   );
 }