feat: 完善后台管理+搜索功能+分销系统

主要更新：
- 后台菜单精简（9项→6项）
- 新增搜索功能（敏感信息过滤）
- 分销绑定和提现系统完善
- 数据库初始化API（自动修复表结构）
- 用户管理：显示绑定关系详情
- 小程序：上下章导航优化、匹配页面重构
- 修复hydration和数据类型问题

app/chapters/page.tsx

@@ -2,9 +2,10 @@
 
 import { useState } from "react"
 import { useRouter } from "next/navigation"
-import { ChevronRight, Lock, Unlock, Book, BookOpen, Home, List, Sparkles, User, Users, Zap, Crown } from "lucide-react"
+import { ChevronRight, Lock, Unlock, Book, BookOpen, Home, List, Sparkles, User, Users, Zap, Crown, Search } from "lucide-react"
 import { useStore } from "@/lib/store"
 import { bookData, getTotalSectionCount, specialSections, getPremiumBookPrice, getExtraSectionsCount, BASE_SECTIONS_COUNT } from "@/lib/book-data"
+import { SearchModal } from "@/components/search-modal"
 
 export default function ChaptersPage() {
   const router = useRouter()
@@ -12,6 +13,7 @@ export default function ChaptersPage() {
   const [expandedPart, setExpandedPart] = useState<string | null>("part-1")
   const [bookVersion, setBookVersion] = useState<"basic" | "premium">("basic")
   const [showPremiumTab, setShowPremiumTab] = useState(false) // 控制是否显示最新完整版标签
+  const [searchOpen, setSearchOpen] = useState(false)
 
   const totalSections = getTotalSectionCount()
   const hasFullBook = user?.hasFullBook || false
@@ -25,11 +27,21 @@ export default function ChaptersPage() {
   return (
     <div className="min-h-screen bg-black text-white pb-24">
       <header className="sticky top-0 z-40 bg-black/90 backdrop-blur-xl border-b border-white/5">
-        <div className="px-4 py-3 flex items-center justify-center">
+        <div className="px-4 py-3 flex items-center justify-between">
+          <div className="w-8" /> {/* 占位 */}
           <h1 className="text-lg font-semibold text-[#00CED1]">目录</h1>
+          <button
+            onClick={() => setSearchOpen(true)}
+            className="w-8 h-8 rounded-full bg-[#2c2c2e] flex items-center justify-center hover:bg-[#3c3c3e] transition-colors"
+          >
+            <Search className="w-4 h-4 text-gray-400" />
+          </button>
         </div>
       </header>
 
+      {/* 搜索弹窗 */}
+      <SearchModal open={searchOpen} onOpenChange={setSearchOpen} />
+
       <div className="mx-4 mt-4 p-4 rounded-2xl bg-gradient-to-br from-[#1c1c1e] to-[#2c2c2e] border border-[#00CED1]/20">
         <div className="flex items-center gap-3">
           <div className="w-12 h-12 rounded-xl bg-gradient-to-br from-[#00CED1] to-[#20B2AA] flex items-center justify-center">