Update project documentation and enhance user interaction features

- Added a new entry for user interaction habit analysis based on agent transcripts, summarizing key insights into communication styles and preferences.
- Updated project indices to reflect the latest developments, including the addition of a wallet balance feature and enhancements to the mini program's user interface for better user experience.
- Improved the handling of loading states in the chapters page, ensuring a smoother user experience during data retrieval.
- Implemented a gift payment sharing feature, allowing users to share payment requests with friends for collaborative purchases.

miniprogram/pages/chapters/chapters.js

@@ -40,7 +40,10 @@ Page({
     ],
 
     // 每日新增章节（懒加载后暂无，可后续用 latest-chapters 补充）
-    dailyChapters: []
+    dailyChapters: [],
+
+    // book/parts 加载中
+    partsLoading: true
   },
 
   onLoad() {
@@ -55,16 +58,40 @@ Page({
   },
 
   // 懒加载：仅拉取篇章列表 + totalSections + fixedSections
+  // 优先 book/parts，404 或失败时降级为 all-chapters 推导
   async loadParts() {
+    this.setData({ partsLoading: true })
     try {
-      const res = await app.request({ url: '/api/miniprogram/book/parts', silent: true })
-      if (!res?.success) {
-        this.setData({ bookData: [], totalSections: 0 })
-        return
+      let res
+      try {
+        res = await app.request({ url: '/api/miniprogram/book/parts', silent: true })
+      } catch (e) {
+        console.log('[Chapters] book/parts 失败，降级 all-chapters:', e?.message || e)
+        res = null
+      }
+      let parts = []
+      let totalSections = 0
+      let fixedSections = []
+      if (res?.success && Array.isArray(res.parts) && res.parts.length > 0) {
+        parts = res.parts
+        totalSections = res.totalSections ?? 0
+        fixedSections = res.fixedSections || []
+      } else {
+        // 降级：从 all-chapters 推导 parts
+        const allRes = await app.request({ url: '/api/miniprogram/book/all-chapters', silent: true })
+        const list = (allRes?.data || allRes?.chapters || [])
+        totalSections = list.length
+        const pt = (c) => (c.partTitle || c.part_title || '').toLowerCase()
+        const exclude = (c) => !pt(c).includes('序言') && !pt(c).includes('尾声') && !pt(c).includes('附录')
+        const partMap = new Map()
+        list.filter(exclude).forEach(c => {
+          const pid = c.partId || c.part_id || 'default'
+          const ptitle = c.partTitle || c.part_title || '未分类'
+          if (!partMap.has(pid)) partMap.set(pid, { id: pid, title: ptitle, subtitle: '', chapterCount: 0 })
+          partMap.get(pid).chapterCount++
+        })
+        parts = Array.from(partMap.values())
       }
-      const parts = res.parts || []
-      const totalSections = res.totalSections ?? 0
-      const fixedSections = res.fixedSections || []
       const numbers = ['一', '二', '三', '四', '五', '六', '七', '八', '九', '十', '十一', '十二']
       const fixedMap = {}
       fixedSections.forEach(f => { fixedMap[f.id] = f.mid })
@@ -87,11 +114,12 @@ Page({
         totalSections,
         fixedSectionsMap: fixedMap,
         appendixList,
-        _loadedChapters: {}
+        _loadedChapters: {},
+        partsLoading: false
       })
     } catch (e) {
       console.log('[Chapters] 加载篇章失败:', e)
-      this.setData({ bookData: [], totalSections: 0 })
+      this.setData({ bookData: [], totalSections: 0, partsLoading: false })
     }
   },