feat: 开发任务时间字段重构 + 双口径耗时 + 搜索 + 性能优化

核心变更:
- DevTask 字段重构：startDate/dueDate/estimateHours/actualHours 替换为 expectedStartAt/expectedEndAt/actualStartAt/actualEndAt（含时分），预计/实际工时按工作时段（9:00-12:00 + 13:00-18:00）派生计算
- 状态机自动化：到点自动切开发中、未到可手动开干、超期需填延后原因
- 新建 lib/work-hours.ts：calcWorkHours（工作时段过滤）、formatWorkHours（X h（Y 天））、calcTwoMetrics（日历/人力双口径）
- 新建 lib/dev-task-transitions.ts：状态切换守卫
- 三个 Tab 顶部统计：开发任务（预/日历/人力）、测试用例 / Bug（日历 / 人力）；版本概览总人天投入改双行（日历总耗时 / 人力总投入）
- 三个 Tab 加搜索框：300ms debounce + 标题/编号模糊匹配
- 性能优化：requirementIds/categories/requirements/testCases 转 Map/Set 索引、Row 组件 React.memo
- 全局耗时显示统一带天数换算：8h（1天）、11h（1.4天）

新增文件: SearchInput.tsx, useDebouncedValue.ts, work-hours.ts, dev-task-transitions.ts, 设计文档

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/components/test-case/TestCaseTab.tsx

@@ -11,8 +11,11 @@ import { TestCaseRow } from './TestCaseRow';
 import { TestCaseCreateModal } from './TestCaseCreateModal';
 import { TestCaseDetailDrawer } from './TestCaseDetailDrawer';
 import { BugCreateModal } from '@/components/bug/BugCreateModal';
-import { calcTestProgress, TEST_CASE_STATUS_LABEL } from '@/lib/test-case';
+import { calcTestProgress, TEST_CASE_STATUS_LABEL, testCaseIntervals } from '@/lib/test-case';
+import { formatWorkHours, calcTwoMetrics } from '@/lib/work-hours';
 import { Pagination, usePagination } from '@/components/Pagination';
+import { SearchInput, matchTitleOrNo } from '@/components/SearchInput';
+import { useDebouncedValue } from '@/hooks/useDebouncedValue';
 import type { TestCaseStatus } from '@/lib/test-case';
 
 interface Props {
@@ -30,27 +33,33 @@ export function TestCaseTab({ versionId, requirementIds }: Props) {
   useEffect(() => { fetchTestCases(); }, [fetchTestCases]);
   useEffect(() => { fetchBugs(); }, [fetchBugs]);
 
+  const reqIdSet = useMemo(() => new Set(requirementIds), [requirementIds]);
   const versionCases = useMemo(
     () => testCases.filter((c) => c.versionId === versionId),
     [testCases, versionId],
   );
 
-  // 提测状态
-  const versionDevTasks = useMemo(() => devTasks.filter((t) => requirementIds.includes(t.requirementId)), [devTasks, requirementIds]);
+  const versionDevTasks = useMemo(
+    () => devTasks.filter((t) => reqIdSet.has(t.requirementId)),
+    [devTasks, reqIdSet],
+  );
   const allSubmitted = versionDevTasks.length > 0 && versionDevTasks.every((t) => t.status === 'submitted');
 
   const stats = calcTestProgress(versionCases);
+  const { calendarHours: tcCalendarHours, manhours: tcManhours } = useMemo(() => calcTwoMetrics(testCaseIntervals(versionCases)), [versionCases]);
 
-  // 筛选
   const [filterAssignee, setFilterAssignee] = useState('');
   const [filterStatus, setFilterStatus] = useState('');
+  const [keyword, setKeyword] = useState('');
+  const debouncedKeyword = useDebouncedValue(keyword, 300);
 
   const filteredCases = useMemo(() => {
     let result = versionCases;
     if (filterAssignee) result = result.filter((c) => c.assigneeId === filterAssignee);
     if (filterStatus) result = result.filter((c) => c.status === filterStatus);
+    if (debouncedKeyword) result = result.filter((c) => matchTitleOrNo({ title: c.title, no: c.caseNo }, debouncedKeyword));
     return result;
-  }, [versionCases, filterAssignee, filterStatus]);
+  }, [versionCases, filterAssignee, filterStatus, debouncedKeyword]);
 
   const { paged, page, setPage, total, pageSize, setPageSize } = usePagination(filteredCases, 20);
 
@@ -58,18 +67,13 @@ export function TestCaseTab({ versionId, requirementIds }: Props) {
   const [selectedCaseId, setSelectedCaseId] = useState<string | null>(null);
   const [bugForCaseId, setBugForCaseId] = useState<string | null>(null);
 
-  // 批量选择
   const [selectedIds, setSelectedIds] = useState<Set<string>>(new Set());
-  const isAllSelected = paged.length > 0 && paged.every((c) => selectedIds.has(c.id));
 
   const toggleSelect = (id: string) => {
     const next = new Set(selectedIds);
     if (next.has(id)) next.delete(id); else next.add(id);
     setSelectedIds(next);
   };
-  const toggleAll = () => {
-    setSelectedIds(isAllSelected ? new Set() : new Set(paged.map((c) => c.id)));
-  };
   const handleBatchDelete = () => {
     if (selectedIds.size === 0) return;
     const hasBug = Array.from(selectedIds).some((id) => bugs.some((b) => b.testCaseId === id));
@@ -79,7 +83,6 @@ export function TestCaseTab({ versionId, requirementIds }: Props) {
     setSelectedIds(new Set());
   };
 
-  // 按需求分组
   const groupedByReq = useMemo(() => {
     const map = new Map<string, typeof paged>();
     for (const c of paged) {
@@ -91,12 +94,18 @@ export function TestCaseTab({ versionId, requirementIds }: Props) {
     return map;
   }, [paged]);
 
+  const requirementMap = useMemo(() => new Map(requirements.map((r) => [r.id, r])), [requirements]);
+  const bugCountByCase = useMemo(() => {
+    const map = new Map<string, number>();
+    for (const b of bugs) map.set(b.testCaseId, (map.get(b.testCaseId) ?? 0) + 1);
+    return map;
+  }, [bugs]);
+
   const assignees = useMemo(() => Array.from(new Set(versionCases.map((c) => c.assigneeId).filter(Boolean) as string[])), [versionCases]);
-  const hasFilter = !!(filterAssignee || filterStatus);
+  const hasFilter = !!(filterAssignee || filterStatus || debouncedKeyword);
 
   return (
     <div className="space-y-3">
-      {/* 提测通知 */}
       {allSubmitted && (
         <div className="flex items-center gap-2 px-4 py-2 rounded-lg bg-emerald-50 border border-emerald-200">
           <CheckCircle2 className="h-3.5 w-3.5 text-emerald-600" />
@@ -110,7 +119,6 @@ export function TestCaseTab({ versionId, requirementIds }: Props) {
         </div>
       )}
 
-      {/* 工具栏：进度 + 筛选 + 操作 一行 */}
       <div className="flex items-center gap-2 px-4 py-2.5 rounded-lg bg-[var(--bg-subtle)] border border-[var(--line)] flex-wrap">
         <ClipboardCheck className="h-3.5 w-3.5 text-emerald-500 shrink-0" />
         <span className="text-[12px] font-medium text-[var(--ink)] shrink-0">{stats.completionRate}%</span>
@@ -119,9 +127,13 @@ export function TestCaseTab({ versionId, requirementIds }: Props) {
         </div>
         <span className="text-[11px] text-[var(--ink-muted)] shrink-0">{stats.total}例 · 通过{stats.passed} · 失败{stats.failed}</span>
         <span className="text-[11px] text-[var(--ink-muted)] shrink-0">通过率{stats.passRate}%</span>
+        {tcManhours > 0 && (
+          <span className="text-[11px] text-[var(--ink-muted)] shrink-0">日历 {formatWorkHours(tcCalendarHours)} / 人力 {formatWorkHours(tcManhours)}</span>
+        )}
 
         <span className="w-px h-4 bg-[var(--line)] mx-1 shrink-0" />
 
+        <SearchInput value={keyword} onChange={(v) => { setKeyword(v); setPage(1); }} placeholder="搜索标题/编号" />
         <select value={filterAssignee} onChange={(e) => { setFilterAssignee(e.target.value); setPage(1); }} className="h-6 rounded border border-[var(--line)] bg-[var(--bg-card)] px-1.5 text-[11px] text-[var(--ink-soft)] focus:border-[var(--accent)] focus:outline-none">
           <option value="">负责人</option>
           {user?.name && <option value={user.name}>我的</option>}
@@ -131,7 +143,7 @@ export function TestCaseTab({ versionId, requirementIds }: Props) {
           <option value="">状态</option>
           {(Object.entries(TEST_CASE_STATUS_LABEL) as [TestCaseStatus, string][]).map(([k, v]) => <option key={k} value={k}>{v}</option>)}
         </select>
-        {hasFilter && <button onClick={() => { setFilterAssignee(''); setFilterStatus(''); setPage(1); }} className="text-[10px] text-[var(--accent)] hover:underline shrink-0">清除</button>}
+        {hasFilter && <button onClick={() => { setFilterAssignee(''); setFilterStatus(''); setKeyword(''); setPage(1); }} className="text-[10px] text-[var(--accent)] hover:underline shrink-0">清除</button>}
 
         <div className="ml-auto flex items-center gap-2 shrink-0">
           {selectedIds.size > 0 && (
@@ -145,7 +157,6 @@ export function TestCaseTab({ versionId, requirementIds }: Props) {
         </div>
       </div>
 
-      {/* 列表 */}
       {filteredCases.length === 0 ? (
         <div className="rounded-xl border border-dashed border-[var(--line)] bg-[var(--bg-card)] p-12 text-center">
           <p className="text-[13px] text-[var(--ink-muted)]">{hasFilter ? '没有匹配的用例' : '暂无测试用例'}</p>
@@ -153,7 +164,7 @@ export function TestCaseTab({ versionId, requirementIds }: Props) {
         </div>
       ) : (
         Array.from(groupedByReq.entries()).map(([reqId, cases]) => {
-          const req = reqId === '__none__' ? null : requirements.find((r) => r.id === reqId);
+          const req = reqId === '__none__' ? null : requirementMap.get(reqId);
           const reqPassed = cases.filter((c) => c.status === 'passed').length;
           return (
             <div key={reqId} className="rounded-lg border border-[var(--line)] bg-[var(--bg-card)] overflow-hidden">
@@ -169,7 +180,7 @@ export function TestCaseTab({ versionId, requirementIds }: Props) {
                     <input type="checkbox" checked={selectedIds.has(c.id)} onChange={() => toggleSelect(c.id)} className="h-3.5 w-3.5 rounded border-[var(--line)]" onClick={(e) => e.stopPropagation()} />
                   </div>
                   <div className="flex-1 min-w-0">
-                    <TestCaseRow testCase={c} bugCount={bugs.filter((b) => b.testCaseId === c.id).length} onClick={() => setSelectedCaseId(c.id)} />
+                    <TestCaseRow testCase={c} bugCount={bugCountByCase.get(c.id) ?? 0} onClick={() => setSelectedCaseId(c.id)} />
                   </div>
                 </div>
               ))}