Redesign the study side: Outline, Study, Script and Export stages

Studies now move through a stage bar in the reader's themes. Outline splits
chunks by clicking between verses (join merges notes) and suggests chunks from
section headings. Study is three panes: outline, passage with an Observe /
Interpret / Apply accordion, and commentary / word study / cross-refs / people
& places for the chunk; original words are added by clicking them in the
interlinear. Script drafts an outline from notes; Export holds files and the
share link. Home, Import and the Pronunciation guide are restyled. Study
projects are BSB only.

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

src/components/study/CommentaryChunkTab.jsx

@@ -0,0 +1,56 @@
+// Commentary for the chunk's verse range, from seven open sources. Some sources
+// comment on whole passages, so when nothing starts inside the range we show the
+// closest earlier entry. "Add to notes" quotes a paragraph, with its citation, into
+// the chunk's background notes.
+import { COMMENTARIES } from '../../hooks/useVerseStudy.js';
+import { formatChunkReference } from '../../utils/bibleUtils.jsx';
+
+export default function CommentaryChunkTab({ resources, chunk, project, chapterIndex, updateChunk, notify }) {
+  const { commentarySource, setCommentarySource, commentaryData, commentaryLoading, commentaryError } = resources;
+  const source = COMMENTARIES.find((c) => c.id === commentarySource) ?? COMMENTARIES[0];
+  const items = (commentaryData?.chapter?.content ?? []).filter((i) => i.type === 'verse').sort((a, b) => a.number - b.number);
+  let entries = items.filter((i) => i.number >= chunk.startVerse && i.number <= chunk.endVerse);
+  let earlier = false;
+  if (entries.length === 0) {
+    const before = [...items].reverse().find((i) => i.number <= chunk.startVerse);
+    if (before) { entries = [before]; earlier = true; }
+  }
+  const ref = formatChunkReference(project, chapterIndex, chunk, '–');
+
+  const quote = (text, verse) => {
+    const citation = `${text} (${source.name}, ${ref.split(':')[0]}:${verse})`;
+    const existing = chunk.generalNotes ?? '';
+    updateChunk(chunk.id, { generalNotes: existing ? `${existing}\n\n${citation}` : citation });
+    notify('Added to background notes.', 1600);
+  };
+
+  return (
+    <div>
+      <select aria-label="Commentary source" value={source.id} onChange={(e) => setCommentarySource(e.target.value)}
+        className="mb-3 w-full rounded-lg border border-[var(--r-line)] bg-[var(--r-bg)] px-2 py-1.5 text-sm text-[var(--r-text)]">
+        {COMMENTARIES.map((c) => <option key={c.id} value={c.id}>{c.name}</option>)}
+      </select>
+      {commentaryLoading && <p className="text-sm text-[var(--r-sub)]">Loading commentary…</p>}
+      {commentaryError && <p className="text-sm text-[var(--r-sub)]">{commentaryError}</p>}
+      {!commentaryLoading && !commentaryError && commentaryData && entries.length === 0 && (
+        <p className="text-sm text-[var(--r-sub)]">No commentary found for {ref}.</p>
+      )}
+      {!commentaryLoading && !commentaryError && entries.map((v) => (
+        <div key={v.number} className="mb-4">
+          <p className="mb-1 text-xs font-medium text-[var(--r-sub)]">{earlier ? `Notes on the passage starting at verse ${v.number}` : `Verse ${v.number}`}</p>
+          {(v.content ?? []).map((p, i) => {
+            const text = typeof p === 'string' ? p : '';
+            if (!text) return null;
+            return (
+              <div key={i} className="group mb-2">
+                <p className="whitespace-pre-line text-[13px] leading-relaxed">{text}</p>
+                <button type="button" onClick={() => quote(text, v.number)} className="mt-0.5 text-[11px] text-[var(--r-accent)] opacity-70 hover:underline hover:opacity-100">Add to notes</button>
+              </div>
+            );
+          })}
+        </div>
+      ))}
+      <p className="mt-2 text-[10px] text-[var(--r-sub)]">{source.credit}</p>
+    </div>
+  );
+}