feat(版本详情): 完善流程日志与需求覆盖

apps/web/lib/dev-task.ts

@@ -112,6 +112,21 @@ function roundEffortHours(hours: number): number {
   return Number(hours.toFixed(2));
 }
 
+export function needsDevTaskClaim(task: Pick<DevTask, 'assigneeId'>): boolean {
+  return !task.assigneeId?.trim();
+}
+
+export function hasDevTaskPlan(task: Pick<DevTask, 'expectedStartAt' | 'expectedEndAt'>): boolean {
+  if (!task.expectedStartAt || !task.expectedEndAt) return false;
+  const start = new Date(task.expectedStartAt).getTime();
+  const end = new Date(task.expectedEndAt).getTime();
+  return Number.isFinite(start) && Number.isFinite(end) && end > start;
+}
+
+export function canStartDevTask(task: Pick<DevTask, 'assigneeId' | 'expectedStartAt' | 'expectedEndAt'>): boolean {
+  return !needsDevTaskClaim(task) && hasDevTaskPlan(task);
+}
+
 export function getActualHours(task: DevTask, now: Date = new Date()): number {
   if (!task.actualStartAt) return 0;
   const end = task.actualEndAt ?? (task.status === 'submitted' ? task.updatedAt : now.toISOString());