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/finance/transactions/[id].put.ts

@@ -0,0 +1,47 @@
+import { getRouterParam, readBody } from 'h3';
+
+import { restoreTransaction, updateTransaction } from '~/utils/finance-repository';
+import { useResponseError, useResponseSuccess } from '~/utils/response';
+
+export default defineEventHandler(async (event) => {
+  const id = Number(getRouterParam(event, 'id'));
+  if (Number.isNaN(id)) {
+    return useResponseError('参数错误', -1);
+  }
+
+  const body = await readBody(event);
+
+  if (body?.isDeleted === false) {
+    const restored = restoreTransaction(id);
+    if (!restored) {
+      return useResponseError('交易不存在', -1);
+    }
+    return useResponseSuccess(restored);
+  }
+
+  const payload: Record<string, unknown> = {};
+
+  if (body?.type) payload.type = body.type;
+  if (body?.amount !== undefined) {
+    const amount = Number(body.amount);
+    if (Number.isNaN(amount)) {
+      return useResponseError('金额格式不正确', -1);
+    }
+    payload.amount = amount;
+  }
+  if (body?.currency) payload.currency = body.currency;
+  if (body?.categoryId !== undefined) payload.categoryId = body.categoryId ?? null;
+  if (body?.accountId !== undefined) payload.accountId = body.accountId ?? null;
+  if (body?.transactionDate) payload.transactionDate = body.transactionDate;
+  if (body?.description !== undefined) payload.description = body.description ?? '';
+  if (body?.project !== undefined) payload.project = body.project ?? null;
+  if (body?.memo !== undefined) payload.memo = body.memo ?? null;
+  if (body?.isDeleted !== undefined) payload.isDeleted = body.isDeleted;
+
+  const updated = updateTransaction(id, payload);
+  if (!updated) {
+    return useResponseError('交易不存在', -1);
+  }
+
+  return useResponseSuccess(updated);
+});