```

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
```

public/index.html

@@ -622,6 +622,7 @@
                         <div style="display:flex;gap:10px;align-items:center;">
                             <button class="btn btn-primary btn-sm" onclick="searchProjectResults()">查询</button>
                             <button class="btn btn-secondary btn-sm" onclick="resetProjectFilters()">重置</button>
+                            <button class="btn btn-success btn-sm" id="btnExportProjects" onclick="exportProjectResults(this)">导出</button>
                             <!-- <button class="btn btn-danger btn-sm" onclick="clearResults()">清空全部</button> -->
                         </div>
                     </div>
@@ -1130,21 +1131,10 @@
 
         async function loadProjectResults() {
             try {
-                await loadProjectFilters();
-                const params = new URLSearchParams({ page: currentProjectsPage, pageSize: 10 });
                 const projectFilters = getProjectFilterValues();
-
+                validateProjectFilters(projectFilters);
-                if (projectFilters.minAmount && projectFilters.maxAmount && Number(projectFilters.minAmount) > Number(projectFilters.maxAmount)) {
+                await loadProjectFilters();
-                    throw new Error('最小金额不能大于最大金额');
+                const params = buildProjectQueryParams({ projectFilters, includePagination: true });
-                }
-
-                if (projectFilters.startDate && projectFilters.endDate && projectFilters.startDate > projectFilters.endDate) {
-                    throw new Error('开始日期不能晚于结束日期');
-                }
-
-                Object.entries(projectFilters).forEach(([key, value]) => {
-                    if (value !== '') params.set(key, value);
-                });
 
                 const res = await fetch('/api/projects?' + params);
                 const json = await res.json();
@@ -1198,6 +1188,31 @@
             };
         }
 
+        function validateProjectFilters(projectFilters) {
+            if (projectFilters.minAmount && projectFilters.maxAmount && Number(projectFilters.minAmount) > Number(projectFilters.maxAmount)) {
+                throw new Error('最小金额不能大于最大金额');
+            }
+
+            if (projectFilters.startDate && projectFilters.endDate && projectFilters.startDate > projectFilters.endDate) {
+                throw new Error('开始日期不能晚于结束日期');
+            }
+        }
+
+        function buildProjectQueryParams({ projectFilters = getProjectFilterValues(), includePagination = true } = {}) {
+            const params = new URLSearchParams();
+
+            if (includePagination) {
+                params.set('page', currentProjectsPage);
+                params.set('pageSize', 10);
+            }
+
+            Object.entries(projectFilters).forEach(([key, value]) => {
+                if (value !== '') params.set(key, value);
+            });
+
+            return params;
+        }
+
         function searchProjectResults() {
             currentProjectsPage = 1;
             loadProjectResults();
@@ -1220,6 +1235,73 @@
             loadProjectResults();
         }
 
+        async function exportProjectResults(buttonEl) {
+            const btn = buttonEl || document.getElementById('btnExportProjects');
+            const originalText = btn ? btn.textContent : '导出';
+
+            try {
+                const projectFilters = getProjectFilterValues();
+                validateProjectFilters(projectFilters);
+
+                if (btn) {
+                    btn.disabled = true;
+                    btn.textContent = '导出中...';
+                }
+
+                const res = await fetch('/api/projects/export?' + buildProjectQueryParams({
+                    projectFilters,
+                    includePagination: false,
+                }));
+
+                if (!res.ok) {
+                    let message = '导出失败';
+                    try {
+                        const json = await res.json();
+                        message = json.error || message;
+                    } catch (_error) {
+                        // Ignore JSON parse failure and use the fallback message.
+                    }
+                    throw new Error(message);
+                }
+
+                const blob = await res.blob();
+                const downloadUrl = URL.createObjectURL(blob);
+                const link = document.createElement('a');
+                link.href = downloadUrl;
+                link.download = getDownloadFilename(
+                    res.headers.get('content-disposition'),
+                    `projects-${new Date().toISOString().slice(0, 19).replace(/[-:]/g, '').replace('T', '-')}.csv`
+                );
+                document.body.appendChild(link);
+                link.click();
+                link.remove();
+                URL.revokeObjectURL(downloadUrl);
+            } catch (e) {
+                alert('导出失败: ' + e.message);
+            } finally {
+                if (btn) {
+                    btn.disabled = false;
+                    btn.textContent = originalText;
+                }
+            }
+        }
+
+        function getDownloadFilename(contentDisposition, fallbackName) {
+            if (!contentDisposition) return fallbackName;
+
+            const utf8Match = contentDisposition.match(/filename\*=UTF-8''([^;]+)/i);
+            if (utf8Match && utf8Match[1]) {
+                return decodeURIComponent(utf8Match[1]);
+            }
+
+            const asciiMatch = contentDisposition.match(/filename="([^"]+)"/i) || contentDisposition.match(/filename=([^;]+)/i);
+            if (asciiMatch && asciiMatch[1]) {
+                return asciiMatch[1].trim();
+            }
+
+            return fallbackName;
+        }
+
         function renderResults({ data, total, page, pageSize, listId, paginationId }) {
             const container = document.getElementById(listId);
             if (!data || data.length === 0) {

src/resultStore.js

@@ -690,12 +690,11 @@ export function listProjects({
 } = {}) {
   initResultsStore();
 
-  const rows = queryBaseRows({});
+  const projects = getProjects({
-  const projects = buildProjectList(rows, {
     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 {
+    const { page = 1, pageSize = 20 } = req.query;
-      city,
+    const filters = getProjectQueryFilters(req.query);
-      section,
-      projectName,
-      minAmount,
-      maxAmount,
-      startDate,
-      endDate,
-      page = 1,
-      pageSize = 20,
-    } = req.query;
     const result = listProjects({
-      city,
+      ...filters,
-      section,
-      projectName,
-      minAmount,
-      maxAmount,
-      startDate,
-      endDate,
       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 }) });