更新管理员登录和鉴权逻辑，优化用户体验；重构相关API以支持更安全的身份验证；调整数据库初始化以兼容新字段，确保用户信息安全；修复部分组件样式和功能，提升整体可用性。

app/api/admin/chapters/route.ts

@@ -6,6 +6,7 @@
 import { NextResponse } from 'next/server'
 import fs from 'fs'
 import path from 'path'
+import { requireAdminResponse } from '@/lib/admin-auth'
 
 // 获取书籍目录
 const BOOK_DIR = path.join(process.cwd(), 'book')
@@ -14,6 +15,8 @@ const BOOK_DIR = path.join(process.cwd(), 'book')
  * GET - 获取所有章节列表
  */
 export async function GET(request: Request) {
+  const authErr = requireAdminResponse(request)
+  if (authErr) return authErr
   try {
     const { searchParams } = new URL(request.url)
     const includeContent = searchParams.get('content') === 'true'
@@ -274,6 +277,8 @@ export async function GET(request: Request) {
  * POST - 更新章节设置
  */
 export async function POST(request: Request) {
+  const authErr = requireAdminResponse(request)
+  if (authErr) return authErr
   try {
     const body = await request.json()
     const { action, chapterId, data } = body