v1.19 全面改版：VIP会员系统、我的收益、创业老板排行、阅读量排序

- 后端: users表新增VIP字段, 4个VIP API (purchase/status/profile/members)
- 后端: hot接口改按user_tracks阅读量排序
- 后端: orders表支持vip产品类型, migrate新增vip_fields迁移
- 小程序「我的」: 推广中心改为我的收益, 头像VIP标识, VIP入口卡片
- 小程序「我的」: 最近阅读显示真实章节名称
- 小程序首页: 去掉内容概览, 新增创业老板排行(4列网格)
- 小程序首页: 精选推荐从hot接口获取, goToRead增加track记录
- 新增页面: VIP详情页, 会员详情页
- 开发文档精简为10个标准目录, 创建SKILL.md, 需求日志规范化

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

app/api/db/migrate/route.ts

@@ -115,6 +115,47 @@ export async function POST(request: NextRequest) {
       }
     }
     
+    // VIP会员字段
+    if (!migration || migration === 'vip_fields') {
+      const vipFields = [
+        { name: 'is_vip', def: "BOOLEAN DEFAULT FALSE COMMENT 'VIP会员'" },
+        { name: 'vip_expire_date', def: "TIMESTAMP NULL COMMENT 'VIP到期时间'" },
+        { name: 'vip_name', def: "VARCHAR(100) COMMENT '会员真实姓名'" },
+        { name: 'vip_project', def: "VARCHAR(200) COMMENT '会员项目名称'" },
+        { name: 'vip_contact', def: "VARCHAR(100) COMMENT '会员联系方式'" },
+        { name: 'vip_avatar', def: "VARCHAR(500) COMMENT '会员展示头像'" },
+        { name: 'vip_bio', def: "VARCHAR(500) COMMENT '会员简介'" },
+      ]
+      let addedCount = 0
+      let existCount = 0
+      for (const field of vipFields) {
+        try {
+          await query(`SELECT ${field.name} FROM users LIMIT 1`)
+          existCount++
+        } catch {
+          try {
+            await query(`ALTER TABLE users ADD COLUMN ${field.name} ${field.def}`)
+            addedCount++
+          } catch (e: any) {
+            if (e.code !== 'ER_DUP_FIELDNAME') {
+              results.push(`⚠️ 添加VIP字段 ${field.name} 失败: ${e.message}`)
+            }
+          }
+        }
+      }
+
+      // 扩展 orders.product_type 支持 vip
+      try {
+        await query(`ALTER TABLE orders MODIFY COLUMN product_type ENUM('section', 'fullbook', 'match', 'vip') NOT NULL`)
+        results.push('✅ orders.product_type 已支持 vip')
+      } catch (e: any) {
+        results.push('ℹ️ orders.product_type 更新跳过: ' + e.message)
+      }
+
+      if (addedCount > 0) results.push(`✅ VIP字段新增 ${addedCount} 个`)
+      if (existCount > 0) results.push(`ℹ️ VIP字段已有 ${existCount} 个存在`)
+    }
+
     // 用户标签定义表
     if (!migration || migration === 'user_tag_definitions') {
       try {
@@ -189,7 +230,7 @@ export async function GET() {
     
     // 检查用户表字段
     const userFields: Record<string, boolean> = {}
-    const checkFields = ['ckb_user_id', 'ckb_synced_at', 'ckb_tags', 'tags', 'merged_tags']
+    const checkFields = ['ckb_user_id', 'ckb_synced_at', 'ckb_tags', 'tags', 'merged_tags', 'is_vip', 'vip_expire_date', 'vip_name']
     
     for (const field of checkFields) {
       try {