```

feat(project): 添加项目数据导出功能

- 在项目查询界面添加导出按钮，支持将项目结果导出为CSV文件
- 实现exportProjectResults函数处理导出逻辑，包括参数验证和文件下载
- 新增validateProjectFilters函数用于验证项目筛选条件
- 新增buildProjectQueryParams函数构建查询参数
- 在服务端添加/api/projects/export接口，返回CSV格式数据
- 实现CSV文件生成和下载功能，包含中文文件名处理
- 重构项目查询逻辑，提取getProjects函数复用代码
```

src/resultStore.js

@@ -690,12 +690,11 @@ export function listProjects({
 } = {}) {
   initResultsStore();
 
-  const rows = queryBaseRows({});
-  const projects = buildProjectList(rows, {
+  const projects = getProjects({
     dedupeByName,
     city,
     section,
-    projectNameKeyword: projectName,
+    projectName,
     minAmount,
     maxAmount,
     startDate,
@@ -713,10 +712,34 @@ export function listProjects({
   };
 }
 
+export function getProjects({
+  city,
+  section,
+  projectName,
+  minAmount,
+  maxAmount,
+  startDate,
+  endDate,
+  dedupeByName = true,
+} = {}) {
+  initResultsStore();
+
+  return buildProjectList(queryBaseRows({}), {
+    dedupeByName,
+    city,
+    section,
+    projectNameKeyword: projectName,
+    minAmount,
+    maxAmount,
+    startDate,
+    endDate,
+  });
+}
+
 export function getProjectFilters({ dedupeByName = true } = {}) {
   initResultsStore();
 
-  const projects = buildProjectList(queryBaseRows({}), { dedupeByName });
+  const projects = getProjects({ dedupeByName });
   const cities = [...new Set(projects.map((project) => project.city).filter(Boolean))];
   const sections = [...new Set(projects.map((project) => project.section).filter(Boolean))];
 

src/server.js

@@ -12,6 +12,7 @@ import {
   deleteTaskById,
   listResults,
   listProjects,
+  getProjects,
   deleteResultById,
   clearResults,
   getResultFilters,
@@ -90,6 +91,58 @@ function mergeConfigWithExistingSecrets(incoming = {}) {
   return next;
 }
 
+function getProjectQueryFilters(query = {}) {
+  return {
+    city: query.city,
+    section: query.section,
+    projectName: query.projectName,
+    minAmount: query.minAmount,
+    maxAmount: query.maxAmount,
+    startDate: query.startDate,
+    endDate: query.endDate,
+  };
+}
+
+function formatExportTimestamp(date = new Date()) {
+  const pad = (value) => String(value).padStart(2, '0');
+  return [
+    date.getFullYear(),
+    pad(date.getMonth() + 1),
+    pad(date.getDate()),
+    '-',
+    pad(date.getHours()),
+    pad(date.getMinutes()),
+    pad(date.getSeconds()),
+  ].join('');
+}
+
+function escapeCsvCell(value) {
+  if (value === null || value === undefined) return '';
+  const stringValue = String(value);
+  if (/[",\r\n]/.test(stringValue)) {
+    return `"${stringValue.replace(/"/g, '""')}"`;
+  }
+  return stringValue;
+}
+
+function buildProjectsCsv(projects = []) {
+  const columns = [
+    ['城市', (project) => project.city || ''],
+    ['板块', (project) => project.section || project.type || ''],
+    ['项目名称', (project) => project.projectName || ''],
+    ['金额(元)', (project) => Number.isFinite(project.amountYuan) ? project.amountYuan : ''],
+    ['发布日期', (project) => project.date || ''],
+    ['详情链接', (project) => project.detailLink || ''],
+  ];
+
+  const lines = [
+    columns.map(([header]) => escapeCsvCell(header)).join(','),
+    ...projects.map((project) => columns.map(([, getter]) => escapeCsvCell(getter(project))).join(',')),
+  ];
+
+  return `\uFEFF${lines.join('\r\n')}`;
+}
+
 let isRunning = false;
 let runningStatus = null;
 
@@ -227,25 +280,10 @@ app.get('/api/results/filters', (_req, res) => {
 
 app.get('/api/projects', (req, res) => {
   try {
-    const {
-      city,
-      section,
-      projectName,
-      minAmount,
-      maxAmount,
-      startDate,
-      endDate,
-      page = 1,
-      pageSize = 20,
-    } = req.query;
+    const { page = 1, pageSize = 20 } = req.query;
+    const filters = getProjectQueryFilters(req.query);
     const result = listProjects({
-      city,
-      section,
-      projectName,
-      minAmount,
-      maxAmount,
-      startDate,
-      endDate,
+      ...filters,
       page,
       pageSize,
       dedupeByName: true,
@@ -256,6 +294,23 @@ app.get('/api/projects', (req, res) => {
   }
 });
 
+app.get('/api/projects/export', (req, res) => {
+  try {
+    const projects = getProjects({
+      ...getProjectQueryFilters(req.query),
+      dedupeByName: true,
+    });
+    const csv = buildProjectsCsv(projects);
+    const filename = `projects-${formatExportTimestamp()}.csv`;
+
+    res.setHeader('Content-Type', 'text/csv; charset=utf-8');
+    res.setHeader('Content-Disposition', `attachment; filename="${filename}"; filename*=UTF-8''${encodeURIComponent(filename)}`);
+    res.send(csv);
+  } catch (error) {
+    res.status(500).json({ success: false, error: error.message });
+  }
+});
+
 app.get('/api/projects/filters', (_req, res) => {
   try {
     res.json({ success: true, data: getProjectFilters({ dedupeByName: true }) });