Studying: daily five minutes, reading list, plan-day studies use your template

- Home: "Your five minutes": a rotating Observe/Interpret/Apply prompt on the
  passage whose matching note is thinnest in your own words, a 5:00 clock and a
  box that appends to that note. Pasting is blocked; sessions show in Insights.
- Study: a Reading list tab (R) for the study: books and articles to consult,
  with a note and a tick; merges across devices.
- Starting a study from a reading-plan day now uses the notes template you last
  picked when starting a study by hand (logic moved to utils/planStudy.js).

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

src/utils/mergeStudies.js

@@ -41,6 +41,7 @@ export function mergeChunk(mine, theirs) {
   const noteKeys = new Set([...Object.keys(newer.verseNotes ?? {}), ...Object.keys(older.verseNotes ?? {})]);
   out.verseNotes = Object.fromEntries([...noteKeys].map((k) => [k, mergeText(newer.verseNotes?.[k], older.verseNotes?.[k])]));
   out.firstDraft = [newer.firstDraft, older.firstDraft].filter(Boolean).sort((a, b) => a.at - b.at)[0];
+  out.fiveMinutes = union(newer.fiveMinutes, older.fiveMinutes);
   out.followUps = mergeById(newer.followUps, older.followUps);
   out.recalls = union(newer.recalls, older.recalls);
   out.editedAt = Math.max(mine.editedAt ?? 0, theirs.editedAt ?? 0) || undefined;
@@ -77,7 +78,7 @@ export function mergeStudies(mine, theirs) {
   }
   const ids = new Set(chapters.flatMap((c) => c.chunks.map((k) => k.id)));
   return {
-    project: { ...mine, chapters, selectedChunkId: ids.has(mine.selectedChunkId) ? mine.selectedChunkId : [...ids][0] ?? null },
+    project: { ...mine, chapters, ...(mine.readingList || theirs.readingList ? { readingList: mergeById(mine.readingList, theirs.readingList) } : {}), selectedChunkId: ids.has(mine.selectedChunkId) ? mine.selectedChunkId : [...ids][0] ?? null },
     stats,
   };
 }