大改造：施工进度系统+模板管理+物流收货+分包评分

- 新增5张数据库表：logistics_records, receiving_confirms, project_type_templates, project_phases, subcontractor_events
- 修改3张表：projects(增加type_template_id/current_phase/phase_progress), purchase_orders(增加expected_delivery_date/receiving_status), subcontractors(增加score/initial_score)
- 插入5套预设工程模板（配电安装/架空线路/电缆敷设/变电站/小型工程）
- 后端新增：模板管理API、项目阶段管理API、收货确认API、分包商事件API
- 后端修改：项目创建/预算签约支持模板选择，自动初始化阶段
- 前端新增：工程模板设计器（后台管理）、施工总览页、施工进度页（手机友好）
- 前端修改：项目详情页重构为7个Tab，增加施工进度预览条和进入施工管理按钮
- 菜单更新：施工管理增加施工总览子菜单，后台管理增加工程模板管理

backend/routes/subcontractors.js

@@ -514,4 +514,63 @@ router.delete('/payment-infos/:infoId', async (req, res) => {
   }
 });
 
-module.exports = router;
+module.exports = router;
+router.get('/:id/events', async (req, res) => {
+  try {
+    const result = await db.query(
+      'SELECT * FROM subcontractor_events WHERE subcontractor_id = $1 ORDER BY event_date DESC, created_at DESC',
+      [req.params.id]
+    );
+    res.json({ success: true, data: result.rows });
+  } catch (error) {
+    console.error('获取分包商事件失败:', error);
+    res.status(500).json({ success: false, message: '获取分包商事件失败' });
+  }
+});
+
+router.post('/:id/events', async (req, res) => {
+  try {
+    const { id } = req.params;
+    const { project_id, event_type, score_change, event_date, title, description, created_by } = req.body;
+    if (!event_type || !score_change || !event_date || !title) {
+      return res.status(400).json({ success: false, message: '缺少必填字段' });
+    }
+    if (!['positive', 'negative'].includes(event_type)) {
+      return res.status(400).json({ success: false, message: '事件类型必须是positive或negative' });
+    }
+    const actualChange = event_type === 'positive' ? Math.abs(score_change) : -Math.abs(score_change);
+    const result = await db.query(
+      `INSERT INTO subcontractor_events (subcontractor_id, project_id, event_type, score_change, event_date, title, description, created_by)
+       VALUES ($1, $2, $3, $4, $5, $6, $7, $8) RETURNING id`,
+      [id, project_id || null, event_type, actualChange, event_date, title, description || '', created_by || null]
+    );
+    await db.query(
+      'UPDATE subcontractors SET score = GREATEST(0, score + $1) WHERE id = $2',
+      [actualChange, id]
+    );
+    res.json({ success: true, message: '事件添加成功', data: { id: result.rows[0].id } });
+  } catch (error) {
+    console.error('添加分包商事件失败:', error);
+    res.status(500).json({ success: false, message: '添加分包商事件失败' });
+  }
+});
+
+router.delete('/:id/events/:eventId', async (req, res) => {
+  try {
+    const { id, eventId } = req.params;
+    const eventResult = await db.query('SELECT score_change FROM subcontractor_events WHERE id = $1 AND subcontractor_id = $2', [eventId, id]);
+    if (eventResult.rows.length === 0) {
+      return res.status(404).json({ success: false, message: '事件不存在' });
+    }
+    const scoreChange = eventResult.rows[0].score_change;
+    await db.query('DELETE FROM subcontractor_events WHERE id = $1', [eventId]);
+    await db.query(
+      'UPDATE subcontractors SET score = GREATEST(0, LEAST(200, score - $1)) WHERE id = $2',
+      [scoreChange, id]
+    );
+    res.json({ success: true, message: '事件删除成功' });
+  } catch (error) {
+    console.error('删除分包商事件失败:', error);
+    res.status(500).json({ success: false, message: '删除分包商事件失败' });
+  }
+});