refactor: 整合财务系统到主应用并重构后端架构

主要变更:
- 将独立的 web-finance 应用整合到 web-antd 主应用中
- 重命名 backend-mock 为 backend,增强后端功能
- 新增财务模块 API 端点(账户、预算、类别、交易)
- 增强财务仪表板和报表功能
- 添加 SQLite 数据存储支持和财务数据导入脚本
- 优化路由结构,删除冗余的 finance-system 模块

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

apps/backend/api/auth/login.post.ts

@@ -0,0 +1,36 @@
+import {
+  clearRefreshTokenCookie,
+  setRefreshTokenCookie,
+} from '~/utils/cookie-utils';
+import { generateAccessToken, generateRefreshToken } from '~/utils/jwt-utils';
+import { forbiddenResponse } from '~/utils/response';
+
+export default defineEventHandler(async (event) => {
+  const { password, username } = await readBody(event);
+  if (!password || !username) {
+    setResponseStatus(event, 400);
+    return useResponseError(
+      'BadRequestException',
+      'Username and password are required',
+    );
+  }
+
+  const findUser = MOCK_USERS.find(
+    (item) => item.username === username && item.password === password,
+  );
+
+  if (!findUser) {
+    clearRefreshTokenCookie(event);
+    return forbiddenResponse(event, 'Username or password is incorrect.');
+  }
+
+  const accessToken = generateAccessToken(findUser);
+  const refreshToken = generateRefreshToken(findUser);
+
+  setRefreshTokenCookie(event, refreshToken);
+
+  return useResponseSuccess({
+    ...findUser,
+    accessToken,
+  });
+});