优化数据库初始化，新增用户收货地址表以支持多地址管理；更新章节页面和我的页面，整合底部导航组件，提升用户体验；调整小程序设置页面，增加收货地址管理功能，优化样式与布局。

app/api/db/init/route.ts

@@ -154,6 +154,30 @@ export async function GET(request: NextRequest) {
       results.push('✅ 创建system_config表')
     }
     
+    // 6. 用户收货地址表（多地址，类似淘宝）
+    try {
+      await query('SELECT 1 FROM user_addresses LIMIT 1')
+      results.push('✅ user_addresses表已存在')
+    } catch (e) {
+      await query(`
+        CREATE TABLE IF NOT EXISTS user_addresses (
+          id VARCHAR(50) PRIMARY KEY,
+          user_id VARCHAR(50) NOT NULL,
+          name VARCHAR(50) NOT NULL,
+          phone VARCHAR(20) NOT NULL,
+          province VARCHAR(50) NOT NULL,
+          city VARCHAR(50) NOT NULL,
+          district VARCHAR(50) NOT NULL,
+          detail VARCHAR(200) NOT NULL,
+          is_default TINYINT(1) DEFAULT 0,
+          created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+          updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+          INDEX idx_user_id (user_id)
+        ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
+      `)
+      results.push('✅ 创建user_addresses表')
+    }
+    
     console.log('[DB Init] 数据库升级完成')
     
     return NextResponse.json({

app/api/user/addresses/[id]/route.ts

@@ -0,0 +1,112 @@
+/**
+ * 用户收货地址 - 单条详情 / 编辑 / 删除 / 设为默认
+ * GET: 详情
+ * PUT: 更新（name, phone, detail 等；省/市/区可选）
+ * DELETE: 删除
+ */
+
+import { NextRequest, NextResponse } from 'next/server'
+import { query } from '@/lib/db'
+
+async function getOne(id: string) {
+  const rows = await query(
+    `SELECT id, user_id, name, phone, province, city, district, detail, is_default, created_at, updated_at
+     FROM user_addresses WHERE id = ?`,
+    [id]
+  ) as any[]
+  if (!rows || rows.length === 0) return null
+  const r = rows[0]
+  return {
+    id: r.id,
+    userId: r.user_id,
+    name: r.name,
+    phone: r.phone,
+    province: r.province,
+    city: r.city,
+    district: r.district,
+    detail: r.detail,
+    isDefault: !!r.is_default,
+    fullAddress: `${r.province}${r.city}${r.district}${r.detail}`,
+    createdAt: r.created_at,
+    updatedAt: r.updated_at,
+  }
+}
+
+export async function GET(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  try {
+    const { id } = await params
+    if (!id) {
+      return NextResponse.json({ success: false, message: '缺少地址 id' }, { status: 400 })
+    }
+    const item = await getOne(id)
+    if (!item) {
+      return NextResponse.json({ success: false, message: '地址不存在' }, { status: 404 })
+    }
+    return NextResponse.json({ success: true, item })
+  } catch (e) {
+    console.error('[Addresses] GET one error:', e)
+    return NextResponse.json({ success: false, message: '获取地址失败' }, { status: 500 })
+  }
+}
+
+export async function PUT(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  try {
+    const { id } = await params
+    if (!id) {
+      return NextResponse.json({ success: false, message: '缺少地址 id' }, { status: 400 })
+    }
+    const body = await request.json()
+    const { name, phone, province, city, district, detail, isDefault } = body
+    const existing = await query('SELECT user_id FROM user_addresses WHERE id = ?', [id]) as any[]
+    if (!existing || existing.length === 0) {
+      return NextResponse.json({ success: false, message: '地址不存在' }, { status: 404 })
+    }
+    const userId = existing[0].user_id
+    const updates = []
+    const values = []
+    if (name !== undefined) { updates.push('name = ?'); values.push(name.trim()) }
+    if (phone !== undefined) { updates.push('phone = ?'); values.push(phone.trim()) }
+    if (province !== undefined) { updates.push('province = ?'); values.push((province == null ? '' : String(province)).trim()) }
+    if (city !== undefined) { updates.push('city = ?'); values.push((city == null ? '' : String(city)).trim()) }
+    if (district !== undefined) { updates.push('district = ?'); values.push((district == null ? '' : String(district)).trim()) }
+    if (detail !== undefined) { updates.push('detail = ?'); values.push(detail.trim()) }
+    if (isDefault === true) {
+      await query('UPDATE user_addresses SET is_default = 0 WHERE user_id = ?', [userId])
+      updates.push('is_default = 1')
+    } else if (isDefault === false) {
+      updates.push('is_default = 0')
+    }
+    if (updates.length > 0) {
+      values.push(id)
+      await query(`UPDATE user_addresses SET ${updates.join(', ')}, updated_at = NOW() WHERE id = ?`, values)
+    }
+    const item = await getOne(id)
+    return NextResponse.json({ success: true, item, message: '更新成功' })
+  } catch (e) {
+    console.error('[Addresses] PUT error:', e)
+    return NextResponse.json({ success: false, message: '更新地址失败' }, { status: 500 })
+  }
+}
+
+export async function DELETE(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  try {
+    const { id } = await params
+    if (!id) {
+      return NextResponse.json({ success: false, message: '缺少地址 id' }, { status: 400 })
+    }
+    await query('DELETE FROM user_addresses WHERE id = ?', [id])
+    return NextResponse.json({ success: true, message: '删除成功' })
+  } catch (e) {
+    console.error('[Addresses] DELETE error:', e)
+    return NextResponse.json({ success: false, message: '删除地址失败' }, { status: 500 })
+  }
+}

app/api/user/addresses/route.ts

@@ -0,0 +1,68 @@
+/**
+ * 用户收货地址 - 列表与新建
+ * GET: 列表（需 userId）
+ * POST: 新建（必填 userId, name, phone, detail；省/市/区可选）
+ */
+
+import { NextRequest, NextResponse } from 'next/server'
+import { query } from '@/lib/db'
+import { randomUUID } from 'crypto'
+
+export async function GET(request: NextRequest) {
+  try {
+    const userId = request.nextUrl.searchParams.get('userId')
+    if (!userId) {
+      return NextResponse.json({ success: false, message: '缺少 userId' }, { status: 400 })
+    }
+    const rows = await query(
+      `SELECT id, user_id, name, phone, province, city, district, detail, is_default, created_at, updated_at
+       FROM user_addresses WHERE user_id = ? ORDER BY is_default DESC, updated_at DESC`,
+      [userId]
+    ) as any[]
+    const list = (rows || []).map((r) => ({
+      id: r.id,
+      userId: r.user_id,
+      name: r.name,
+      phone: r.phone,
+      province: r.province,
+      city: r.city,
+      district: r.district,
+      detail: r.detail,
+      isDefault: !!r.is_default,
+      fullAddress: `${r.province}${r.city}${r.district}${r.detail}`,
+      createdAt: r.created_at,
+      updatedAt: r.updated_at,
+    }))
+    return NextResponse.json({ success: true, list })
+  } catch (e) {
+    console.error('[Addresses] GET error:', e)
+    return NextResponse.json({ success: false, message: '获取地址列表失败' }, { status: 500 })
+  }
+}
+
+export async function POST(request: NextRequest) {
+  try {
+    const body = await request.json()
+    const { userId, name, phone, province, city, district, detail, isDefault } = body
+    if (!userId || !name || !phone || !detail) {
+      return NextResponse.json(
+        { success: false, message: '缺少必填项：userId, name, phone, detail' },
+        { status: 400 }
+      )
+    }
+    const id = randomUUID().replace(/-/g, '').slice(0, 24)
+    const p = (v: string | undefined) => (v == null ? '' : String(v).trim())
+    if (isDefault) {
+      await query('UPDATE user_addresses SET is_default = 0 WHERE user_id = ?', [userId])
+    }
+    await query(
+      `INSERT INTO user_addresses (id, user_id, name, phone, province, city, district, detail, is_default)
+       VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)`,
+      [id, userId, name.trim(), phone.trim(), p(province), p(city), p(district), detail.trim(), isDefault ? 1 : 0]
+    )
+    return NextResponse.json({ success: true, id, message: '添加成功' })
+  } catch (e) {
+    console.error('[Addresses] POST error:', e)
+    return NextResponse.json({ success: false, message: '添加地址失败' }, { status: 500 })
+  }
+}