refactor: 完成静态网站转换，移除所有 CMS 和动态功能

- 删除数据库相关代码 (src/db/)
- 删除 API 路由 (src/app/api/)
- 删除认证相关代码 (src/lib/auth/, src/providers/)
- 删除监控和安全中间件 (src/lib/security/, src/lib/monitoring/)
- 删除 hooks (use-news, use-products, use-services)
- 更新组件为静态数据源
- 添加 nginx 静态配置和部署脚本
- 添加 static-link 组件

src/lib/auth.ts

@@ -1,74 +0,0 @@
-import NextAuth from 'next-auth';
-import CredentialsProvider from 'next-auth/providers/credentials';
-import { db } from '@/db';
-import { users } from '@/db/schema';
-import { eq } from 'drizzle-orm';
-import bcrypt from 'bcryptjs';
-
-export const { handlers, signIn, signOut, auth } = NextAuth({
-  trustHost: true,
-  providers: [
-    CredentialsProvider({
-      name: '邮箱密码',
-      credentials: {
-        email: { label: '邮箱', type: 'email' },
-        password: { label: '密码', type: 'password' },
-      },
-      async authorize(credentials) {
-        if (!credentials?.email || !credentials?.password) {
-          return null;
-        }
-
-        const userResult = await db
-          .select()
-          .from(users)
-          .where(eq(users.email, credentials.email as string))
-          .limit(1);
-
-        const user = userResult[0];
-        if (!user) {
-          return null;
-        }
-
-        const isValid = await bcrypt.compare(
-          credentials.password as string,
-          user.passwordHash || ''
-        );
-
-        if (!isValid) {
-          return null;
-        }
-
-        return {
-          id: user.id,
-          email: user.email,
-          name: user.name,
-          isAdmin: user.isAdmin,
-        };
-      },
-    }),
-  ],
-  callbacks: {
-    async jwt({ token, user }) {
-      if (user) {
-        token.id = user.id;
-        token.isAdmin = user.isAdmin;
-      }
-      return token;
-    },
-    async session({ session, token }) {
-      if (session.user) {
-        session.user.id = token.id as string;
-        session.user.isAdmin = token.isAdmin as boolean;
-      }
-      return session;
-    },
-  },
-  pages: {
-    signIn: '/admin/login',
-    error: '/admin/login',
-  },
-  session: {
-    strategy: 'jwt',
-  },
-});