feat(ai): 优化拆解重跑与结果展示

apps/web/lib/dev-task.ts

@@ -26,6 +26,7 @@ export interface DevTask {
   expectedStartAt: string;
   expectedEndAt: string;
   estimateHours?: number;
+  aiEstimateHours?: number;
   actualStartAt?: string;
   actualEndAt?: string;
 
@@ -98,12 +99,19 @@ export function formatHours(hours: number): string {
 
 export function getEstimateHours(task: DevTask): number {
   if (typeof task.estimateHours === 'number' && task.estimateHours > 0) {
-    return Math.round(task.estimateHours * 2) / 2;
+    return roundEffortHours(task.estimateHours);
+  }
+  if (typeof task.aiEstimateHours === 'number' && task.aiEstimateHours > 0) {
+    return roundEffortHours(task.aiEstimateHours);
   }
   if (!task.expectedStartAt || !task.expectedEndAt) return 0;
   return calcWorkHours(task.expectedStartAt, task.expectedEndAt);
 }
 
+function roundEffortHours(hours: number): number {
+  return Number(hours.toFixed(2));
+}
+
 export function getActualHours(task: DevTask, now: Date = new Date()): number {
   if (!task.actualStartAt) return 0;
   const end = task.actualEndAt ?? now.toISOString();