fix: 考核区间支持多批次显示

190辆冷链车有3个不同考核区间（40台、50台、100台），
恒运有2个。后端改为查询每个target的不同考核区间并返回
periods数组，前端换行显示每个区间及其车辆数。

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/modules/mileage/StatisticsView.tsx

@@ -260,7 +260,9 @@ export default function StatisticsView() {
                       <div className="pt-3 mt-2 border-t border-slate-50 landscape:border-slate-800 grid grid-cols-2 gap-x-4 gap-y-3">
                         <div className="space-y-0.5">
                           <p className="text-[8px] font-bold text-slate-400 uppercase tracking-wider">考核区间</p>
-                          <p className="text-[10px] font-black text-slate-700 landscape:text-slate-300">{target.period}</p>
+                          {target.periods.map((p, i) => (
+                            <p key={i} className="text-[10px] font-black text-slate-700 landscape:text-slate-300">{p}</p>
+                          ))}
                         </div>
                         <div className="space-y-0.5">
                           <p className="text-[8px] font-bold text-slate-400 uppercase tracking-wider">总考核里程</p>
@@ -443,7 +445,7 @@ export default function StatisticsView() {
                             <span className="text-[10px] font-bold text-white">{target.avgCompletion.toFixed(1)}%</span>
                           </div>
                         </td>
-                        <td className="p-4 text-[10px] text-slate-400">{target.period}</td>
+                        <td className="p-4 text-[10px] text-slate-400">{target.periods.join('\n')}</td>
                         <td className="p-4 text-xs text-slate-300">{target.annualMileagePerVehicle}</td>
                         <td className="p-4 text-xs font-bold text-emerald-400">{target.yearQualifiedCount}</td>
                         <td className="p-4 text-xs font-bold text-blue-400">{target.halfQualifiedCount}</td>

src/modules/mileage/types.ts

@@ -23,7 +23,7 @@ export interface TargetSummary {
   totalMileagePerVehicle: number;
   annualMileagePerVehicle: number;
   assessmentYears: number;
-  period: string;
+  periods: string[];
   todayTotal: number;
   cumulativeTotal: number;
   avgCompletion: number;

src/server/routes/mileage.ts

@@ -107,6 +107,25 @@ app.get('/targets', async (c) => {
       statsMap.set(s.target_id, s);
     }
 
+    // 查询每个 target 的不同考核区间
+    const [periodRows] = await pool.execute(`
+      SELECT target_id,
+             DATE_FORMAT(assessment_start_date, '%Y-%m-%d') as start_date,
+             DATE_FORMAT(assessment_end_date, '%Y-%m-%d') as end_date,
+             COUNT(*) as cnt
+      FROM tab_mileage_assessment_vehicle
+      WHERE is_deleted = 0
+      GROUP BY target_id, assessment_start_date, assessment_end_date
+      ORDER BY target_id, assessment_start_date
+    `) as any;
+
+    const periodsMap = new Map<number, string[]>();
+    for (const p of periodRows) {
+      const list = periodsMap.get(p.target_id) || [];
+      list.push(`${p.start_date} ~ ${p.end_date} (${p.cnt}台)`);
+      periodsMap.set(p.target_id, list);
+    }
+
     const now = new Date();
     const result = targets.map((t: any) => {
       const s = statsMap.get(t.id) || {};
@@ -117,12 +136,16 @@ app.get('/targets', async (c) => {
       const daysLeft = Math.max(1, Math.ceil((yearEnd.getTime() - now.getTime()) / 86400000));
       const dailyTarget = remaining / daysLeft;
 
+      const periods = periodsMap.get(t.id) || [];
+      if (periods.length === 0) {
         const startDate = t.default_start_date
           ? new Date(t.default_start_date).toISOString().split('T')[0]
           : '';
         const endDate = t.default_end_date
           ? new Date(t.default_end_date).toISOString().split('T')[0]
           : '';
+        if (startDate || endDate) periods.push(`${startDate} ~ ${endDate}`);
+      }
 
       return {
         id: t.id,
@@ -131,7 +154,7 @@ app.get('/targets', async (c) => {
         totalMileagePerVehicle: Number(t.total_mileage_per_vehicle),
         annualMileagePerVehicle: Number(t.annual_mileage_per_vehicle),
         assessmentYears: t.assessment_years,
-        period: `${startDate} ~ ${endDate}`,
+        periods,
         todayTotal: Number(s.today_total) || 0,
         cumulativeTotal: Number(s.cumulative_total) || 0,
         avgCompletion: (Number(s.avg_completion) || 0) * 100,