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/hooks/useProjectLibrary.js

@@ -221,8 +221,8 @@ export function useProjectLibrary({
     });
   };
 
-  // Saves a weekly recall (what you remembered, and how it went) on one chunk of a stored study.
-  const saveChunkRecall = (id, chunkId, recall) => {
+  // Changes one chunk of a stored study (from Home, without opening it) and syncs it. `change` takes the chunk, returns the new one.
+  const updateStoredChunk = (id, chunkId, change) => {
     const loaded = loadProjectById(id);
     if (!loaded) return;
     const updated = {
@@ -230,7 +230,7 @@ export function useProjectLibrary({
       lastEdited: Date.now(),
       chapters: loaded.chapters.map((ch) => ({
         ...ch,
-        chunks: ch.chunks.map((c) => (c.id === chunkId ? { ...c, recalls: [...(c.recalls ?? []), recall] } : c)),
+        chunks: ch.chunks.map((c) => (c.id === chunkId ? change(c) : c)),
       })),
     };
     saveProjectToStorage(updated);
@@ -247,6 +247,11 @@ export function useProjectLibrary({
     });
   };
 
+  // A weekly recall (what you remembered, and how it went) on one chunk.
+  const saveChunkRecall = (id, chunkId, recall) => updateStoredChunk(id, chunkId, (c) => ({ ...c, recalls: [...(c.recalls ?? []), recall] }));
+  // Notes written from Home (the daily five minutes): counts as editing the chunk.
+  const saveChunkPatch = (id, chunkId, patch) => updateStoredChunk(id, chunkId, (c) => ({ ...c, ...patch, editedAt: Date.now() }));
+
   // Deleting is immediate here, with an Undo for a few seconds; only after that is the server copy
   // removed (and straight away if the tab is closed first, so a deleted project never comes back).
   const finishDelete = (id) => {
@@ -314,6 +319,7 @@ export function useProjectLibrary({
     renameProjectInStorage,
     setProjectSeries,
     saveChunkRecall,
+    saveChunkPatch,
     deleteProject,
     pullLatestFromServer,
   };