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/src/features/memoir/draft-progress.ts

@@ -0,0 +1,53 @@
+import type { MemoirState } from './types';
+
+import { CHAPTER_CATEGORY_BY_ORDER_INDEX } from './framework-chapter-keys';
+
+/** 与后端 `reading_segment_materialize.MIN_STORY_CHARS_IN_CHAPTER` 一致：章节可读成稿阈值 */
+export const MIN_CHAPTER_DISPLAY_CHARS = 300;
+
+/**
+ * Chat 口述槽的阶段键（MemoirState.slots）；多章 career_* 共用 `career`，beliefs/summary 与 `belief` 槽对齐。
+ */
+export function chapterCategoryToInterviewStage(category: string): string {
+  const c = (category ?? '').trim();
+  if (!c) return 'childhood';
+  if (c.startsWith('career_')) return 'career';
+  if (c === 'beliefs' || c === 'summary') return 'belief';
+  return c;
+}
+
+export function resolvedChapterCategory(vm: {
+  category: string;
+  orderIndex: number;
+}): string {
+  const raw = vm.category?.trim();
+  if (raw) return raw;
+  return CHAPTER_CATEGORY_BY_ORDER_INDEX[vm.orderIndex] ?? 'childhood';
+}
+
+export function interviewStageHasSnippetMaterial(
+  slots: MemoirState['slots'] | undefined,
+  stage: string,
+): boolean {
+  if (!slots) return false;
+  const block = slots[stage];
+  if (!block) return false;
+  return Object.values(block).some(
+    (cell) => (cell?.snippet ?? '').trim().length > 0,
+  );
+}
+
+export function memoirDraftHasStarted(
+  slots: MemoirState['slots'] | undefined,
+  chapterCategory: string,
+  chapterWordCount: number,
+): boolean {
+  const stage = chapterCategoryToInterviewStage(chapterCategory);
+  if (chapterWordCount > 0) return true;
+  return interviewStageHasSnippetMaterial(slots, stage);
+}
+
+export function memoirDraftCharsRemaining(chapterWordCount: number): number {
+  const n = typeof chapterWordCount === 'number' ? chapterWordCount : 0;
+  return Math.max(0, MIN_CHAPTER_DISPLAY_CHARS - n);
+}

app-expo/src/features/memoir/framework-chapter-keys.ts

@@ -16,6 +16,18 @@ export const FRAMEWORK_CHAPTER_KEYS = [
 
 export type FrameworkChapterKey = (typeof FRAMEWORK_CHAPTER_KEYS)[number];
 
+/** 与后端 `CHAPTER_ORDER` 一致（用于占位章节缺省 category） */
+export const CHAPTER_CATEGORY_BY_ORDER_INDEX = [
+  'childhood',
+  'education',
+  'career_early',
+  'career_achievement',
+  'career_challenge',
+  'family',
+  'beliefs',
+  'summary',
+] as const;
+
 export function buildFrameworkChapterPlaceholders(
   tr: (key: string) => string,
 ): ChapterViewModel[] {