docs: 更新文档与 demo

- 更新 docs/ 与 app-ios/docs/
- 更新 app-ios/demo、assets/demo、app-ios 代码与计划

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

app-ios/.cursor/plans/life_echo_mvp_client_35222af2.plan.md

@@ -1,6 +1,6 @@
 ---
 name: Life Echo MVP Client
-overview: Build a minimal viable React Native client for "往事拾遗" (Life Echo) - a memoir creation app targeting Chinese users. The app will feature WeChat-style chat UI, e-book reading experience, and a profile page, using gluestack.io v3 components with a warm purple color scheme.
+overview: Build a minimal viable React Native client for "岁月时书" (Life Echo) - a memoir creation app targeting Chinese users. The app will feature WeChat-style chat UI, e-book reading experience, and a profile page, using gluestack.io v3 components with a warm purple color scheme.
 todos:
   - id: setup-gluestack
     content: Install and configure gluestack-ui v3 with custom theme tokens
@@ -82,7 +82,7 @@ File: `constants/theme.ts` - Define color tokens following the design rules:
 
 ### Screen 1: Chat List (`app/(tabs)/index.tsx`)
 
-- Header with app title "往事拾遗" and subtitle
+- Header with app title "岁月时书" and subtitle
 - Medium purple header background (#A177A6)
 - Conversation list item with:
   - Avatar (lavender background with book emoji)