Add Insights, Observe-first, compare, handout layouts, richer search, backup nudge

- Commentary and study aids wait for 15 words of your own Observe notes.
- Insights page: this week's own work, themes across studies, words you keep
  studying, what slipped in recalls, open follow-ups.
- Recall can record what slipped; session notes (teach it back, who came,
  group notes, follow-ups); "Pray about this" from Apply.
- Compare any two passages side by side.
- Handout layouts: standard, questions only, large print, note-taking.
- Search understands "in <book>", "last week/month/year" and a year.
- Home shows the last backup age and nudges after two weeks.
- Phone: the stage bar scrolls instead of clipping Script and Export.

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

src/utils/ownWork.js

@@ -47,3 +47,7 @@ export function thinFields(chunk) {
 export function chunksNeedingWork(chunks) {
   return (chunks ?? []).map((chunk) => ({ chunk, missing: thinFields(chunk) })).filter((entry) => entry.missing.length > 0);
 }
+
+// Commentary and study aids stay folded away until you've written this much of your own Observe notes.
+export const OBSERVE_FIRST_MIN = 15;
+export const observeFirstDone = (chunk) => ownWords(chunk, 'observation') >= OBSERVE_FIRST_MIN;