feat(版本): 完善计划覆盖与工作台待办

关键改动：

- 增加计划日志汇总、需求覆盖草稿校验与对应测试

- 抽取工作台工作项 Hook，补充待办计数能力

- 优化版本详情中计划、任务、测试用例和 Bug 的筛选与展示

Co-Authored-By: Codex GPT-5 <codex@openai.com>

apps/web/lib/version-plan.ts

@@ -87,6 +87,11 @@ export type PlanLogDraft = Omit<VersionPlanLog, 'id' | 'createdAt'> & {
   createdAt?: string;
 };
 
+export type VersionPlanLogView = VersionPlanLog & {
+  planId: string;
+  planTitle: string;
+};
+
 export const REQUIREMENT_COVERAGE_LABEL: Record<RequirementCoverageStatus, string> = {
   not_started: '未开始',
   partial: '部分完成',
@@ -177,6 +182,18 @@ export function getRequirementCoverageSummary(plan: VersionPlan): {
   };
 }
 
+export function canSaveRequirementCoverageDraft(
+  status: RequirementCoverageStatus,
+  completedContent?: string,
+  remainingContent?: string,
+): boolean {
+  if (status === 'completed') return true;
+  if (status === 'partial') {
+    return Boolean(completedContent?.trim()) && Boolean(remainingContent?.trim());
+  }
+  return false;
+}
+
 export function appendPlanLog(plan: VersionPlan, draft: PlanLogDraft): VersionPlanLog[] {
   const createdAt = draft.createdAt ?? new Date().toISOString();
   const log: VersionPlanLog = {
@@ -187,6 +204,21 @@ export function appendPlanLog(plan: VersionPlan, draft: PlanLogDraft): VersionPl
   return [log, ...(plan.logs ?? [])];
 }
 
+function getPlanLogCreatedAtTime(log: VersionPlanLog): number {
+  const time = new Date(log.createdAt).getTime();
+  return Number.isFinite(time) ? time : 0;
+}
+
+export function getPlanLogsForPlans(plans: VersionPlan[]): VersionPlanLogView[] {
+  return plans
+    .flatMap((plan) => (plan.logs ?? []).map((log) => ({
+      ...log,
+      planId: plan.id,
+      planTitle: plan.title,
+    })))
+    .sort((a, b) => getPlanLogCreatedAtTime(b) - getPlanLogCreatedAtTime(a));
+}
+
 export function updateRequirementCoverage(
   plan: VersionPlan,
   input: RequirementCoverageUpdateInput,