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;