feat(app-expo): show memoir chapter draft progress on list cards

Explain invite vs. generating state using MemoirState slots, surface remaining
characters to the display gate, refresh memoir-state on pull, and sync i18n.

Co-authored-by: Cursor <cursoragent@cursor.com>

app-expo/tests/features/memoir/draft-progress.test.ts

@@ -0,0 +1,49 @@
+import {
+  chapterCategoryToInterviewStage,
+  memoirDraftCharsRemaining,
+  memoirDraftHasStarted,
+  MIN_CHAPTER_DISPLAY_CHARS,
+  resolvedChapterCategory,
+} from '@/features/memoir/draft-progress';
+
+describe('draft-progress', () => {
+  test('chapterCategoryToInterviewStage maps career chapters to career', () => {
+    expect(chapterCategoryToInterviewStage('career_early')).toBe('career');
+    expect(chapterCategoryToInterviewStage('career_achievement')).toBe('career');
+  });
+
+  test('chapterCategoryToInterviewStage maps beliefs and summary to belief', () => {
+    expect(chapterCategoryToInterviewStage('beliefs')).toBe('belief');
+    expect(chapterCategoryToInterviewStage('summary')).toBe('belief');
+  });
+
+  test('resolvedChapterCategory falls back to order index', () => {
+    expect(
+      resolvedChapterCategory({ category: '', orderIndex: 2 }),
+    ).toBe('career_early');
+  });
+
+  test('memoirDraftHasStarted when interview slots have snippet', () => {
+    const slots = {
+      childhood: { place: { snippet: '老家在小城', segment_ids: [] } },
+    };
+    expect(
+      memoirDraftHasStarted(slots, 'childhood', 0),
+    ).toBe(true);
+  });
+
+  test('memoirDraftHasStarted when word count positive', () => {
+    expect(memoirDraftHasStarted({}, 'childhood', 12)).toBe(true);
+  });
+
+  test('memoirDraftCharsRemaining caps at zero', () => {
+    expect(memoirDraftCharsRemaining(MIN_CHAPTER_DISPLAY_CHARS)).toBe(0);
+    expect(memoirDraftCharsRemaining(MIN_CHAPTER_DISPLAY_CHARS + 50)).toBe(0);
+  });
+
+  test('memoirDraftCharsRemaining subtracts from threshold', () => {
+    expect(memoirDraftCharsRemaining(100)).toBe(
+      MIN_CHAPTER_DISPLAY_CHARS - 100,
+    );
+  });
+});