fix(scheduling): use each candidate's own daysLeft for prediction

Different assessment targets have different end dates. Previously all
candidates used the current vehicle's daysLeft, causing wrong predictions.

Now each inventory vehicle computes its own daysLeft from its assessment
target's current_year_assessment_end_date. predictedAfterSwap uses the
candidate's own daysLeft instead of the current vehicle's.

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

src/modules/scheduling/SuggestionDetail.tsx

@@ -229,7 +229,7 @@ export default function SuggestionDetail({ suggestion: s, onClose, onNotifySucce
                         <span className="text-[9px] text-slate-500 bg-slate-100 px-1.5 py-0.5 rounded flex items-center gap-0.5"><MapPin size={9} />{c.region}</span>
                         <span className="text-[9px] text-slate-400">{c.vehicleType}</span>
                         <span className="text-[9px] text-slate-300">{c.targetName || '库存'}</span>
-                        <span className="text-[9px] text-slate-400">剩余{v.daysLeft}天</span>
+                        <span className="text-[9px] text-slate-400">剩余{c.daysLeft}天</span>
                       </div>
                       {c.canQualifyAfterSwap ? (
                         <span className="text-[9px] font-bold text-emerald-600 flex items-center gap-0.5 bg-emerald-50 px-1.5 py-0.5 rounded">

src/modules/scheduling/types.ts

@@ -25,6 +25,7 @@ export interface CandidateVehicle {
   totalMileage: number;
   completionRate: number;
   yearTarget: number | null;
+  daysLeft: number;
   region: string;
   province: string;
   mileageGap: number;

src/server/routes/scheduling/algorithm.ts

@@ -90,13 +90,10 @@ export function generateSuggestions(
   // Among those, prefer the one with the smallest gap (easiest to finish).
   // Exclude already-qualified (>= 100%) — no value in swapping those.
   for (const vehicle of hopeless) {
-    const customerCanAdd = vehicle.customerAvgDaily * vehicle.daysLeft;
-
     const candidates: CandidateVehicle[] = inventoryVehicles
       .filter((inv) => {
         if (!isTypeCompatible(vehicle.vehicleType, inv.vehicleType)) return false;
         if (inv.region !== vehicle.region) return false;
-        // Exclude already fully qualified
         const effectiveTarget = inv.yearTarget ?? vehicle.yearTarget;
         if (effectiveTarget > 0 && inv.totalMileage >= effectiveTarget) return false;
         return true;
@@ -104,7 +101,9 @@ export function generateSuggestions(
       .map((inv) => {
         const effectiveTarget = inv.yearTarget ?? vehicle.yearTarget;
         const mileageGap = Math.max(0, effectiveTarget - inv.totalMileage);
-        const predictedAfterSwap = inv.totalMileage + customerCanAdd;
+        // Use candidate's own daysLeft for prediction
+        const candidateCanAdd = vehicle.customerAvgDaily * inv.daysLeft;
+        const predictedAfterSwap = inv.totalMileage + candidateCanAdd;
         const canQualifyAfterSwap = predictedAfterSwap >= effectiveTarget;
         return {
           plateNumber: inv.plateNumber,
@@ -114,6 +113,7 @@ export function generateSuggestions(
           totalMileage: inv.totalMileage,
           completionRate: inv.completionRate,
           yearTarget: inv.yearTarget ?? vehicle.yearTarget,
+          daysLeft: inv.daysLeft,
           region: inv.region,
           province: inv.province,
           mileageGap,
@@ -133,7 +133,7 @@ export function generateSuggestions(
 
     const gap = Math.max(0, vehicle.yearTarget - vehicle.currentYearMileage);
     const dailyReq = vehicle.daysLeft > 0 ? Math.round(gap / vehicle.daysLeft) : 0;
-    const predictedTotal = Math.round(vehicle.currentYearMileage + customerCanAdd);
+    const predictedTotal = Math.round(vehicle.currentYearMileage + vehicle.customerAvgDaily * vehicle.daysLeft);
     const reason = `客户日均 ${Math.round(vehicle.customerAvgDaily)} km  |  考核周期剩余 ${vehicle.daysLeft} 天 · 日均需 ${fmtKmSimple(dailyReq)} km\n!!预估无法达标，需替换`;
 
     suggestions.push({
@@ -165,8 +165,9 @@ export function generateSuggestions(
       .map((inv) => {
         const effectiveTarget = inv.yearTarget ?? vehicle.yearTarget;
         const mileageGap = Math.max(0, effectiveTarget - inv.totalMileage);
-        const predictedAfterSwap =
-          inv.totalMileage + vehicle.customerAvgDaily * vehicle.daysLeft;
+        // Use candidate's own daysLeft for prediction
+        const candidateCanAdd = vehicle.customerAvgDaily * inv.daysLeft;
+        const predictedAfterSwap = inv.totalMileage + candidateCanAdd;
         const canQualifyAfterSwap = predictedAfterSwap >= effectiveTarget;
         return {
           plateNumber: inv.plateNumber,
@@ -176,6 +177,7 @@ export function generateSuggestions(
           totalMileage: inv.totalMileage,
           completionRate: inv.completionRate,
           yearTarget: inv.yearTarget ?? vehicle.yearTarget,
+          daysLeft: inv.daysLeft,
           region: inv.region,
           province: inv.province,
           mileageGap,

src/server/routes/scheduling/suggestions.ts

@@ -250,12 +250,21 @@ app.get('/', async (c) => {
 
       // Cross-reference with assessment data
       const assessment = assessmentByPlate.get(plate);
+      // Compute this vehicle's own daysLeft from its assessment end date
+      let invDaysLeft = 0;
+      if (assessment?.current_year_assessment_end_date) {
+        const endDate = new Date(assessment.current_year_assessment_end_date);
+        invDaysLeft = Math.max(1, Math.ceil((endDate.getTime() - now.getTime()) / 86400000));
+      } else {
+        invDaysLeft = Math.max(1, Math.ceil((yearEnd.getTime() - now.getTime()) / 86400000));
+      }
       inventoryVehicles.push({
         plateNumber: plate,
         vehicleType,
         region,
         province,
         totalMileage: assessment ? Number(assessment.vehicle_total_mileage) || 0 : 0,
+        daysLeft: invDaysLeft,
         targetId: assessment ? (assessment.target_id as number) : null,
         targetName: assessment ? (targetMap.get(assessment.target_id)?.targetName ?? null) : null,
         yearTarget: assessment ? Number(assessment.current_year_mileage_task) || null : null,

src/server/routes/scheduling/types.ts

@@ -25,6 +25,7 @@ export interface CandidateVehicle {
   totalMileage: number;
   completionRate: number;
   yearTarget: number | null;
+  daysLeft: number;
   region: string;
   province: string;
   mileageGap: number;
@@ -97,6 +98,7 @@ export interface InventoryVehicle {
   region: string;
   province: string;
   totalMileage: number;
+  daysLeft: number;
   targetId: number | null;
   targetName: string | null;
   yearTarget: number | null;