feat(dev-task): 开发任务模块 V1 完整实现

- 核心库：dev-task.ts（类型+状态机+进度计算）、task-worklog.ts（工时）、task-category.ts（字典）、work-item.ts（聚合契约）
- Store：useDevTaskStore（CRUD+状态流转）、useTaskWorklogStore（工时记录）、useTaskCategoryStore（字典管理）
- UI组件：DevTaskTab、DevTaskCreateModal、DevTaskDetailDrawer、DevTaskRow、WorklogPanel、StatusBadge、CategoryChip
- 集成：版本详情页"开发任务"Tab、"与我相关"工作台开发任务分组、任务类型管理页
- 设计文档：spec + 实施计划

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

apps/web/lib/task-worklog.ts

@@ -0,0 +1,33 @@
+export interface TaskWorklog {
+  id: string;
+  taskId: string;
+  userId: string;
+  date: string;
+  hours: number;
+  workContent: string;
+  createdAt: string;
+}
+
+export function calcActualHours(worklogs: TaskWorklog[], taskId: string): number {
+  return worklogs
+    .filter((w) => w.taskId === taskId)
+    .reduce((sum, w) => sum + w.hours, 0);
+}
+
+export function getTaskWorklogs(worklogs: TaskWorklog[], taskId: string): TaskWorklog[] {
+  return worklogs
+    .filter((w) => w.taskId === taskId)
+    .sort((a, b) => b.date.localeCompare(a.date));
+}
+
+export function getUserDailyWorklogs(worklogs: TaskWorklog[], userId: string, date: string): TaskWorklog[] {
+  return worklogs.filter((w) => w.userId === userId && w.date === date);
+}
+
+export function getUserDailySummary(worklogs: TaskWorklog[], userId: string, date: string): { total: number; items: { taskId: string; hours: number; workContent: string }[] } {
+  const items = getUserDailyWorklogs(worklogs, userId, date);
+  return {
+    total: items.reduce((sum, w) => sum + w.hours, 0),
+    items: items.map((w) => ({ taskId: w.taskId, hours: w.hours, workContent: w.workContent })),
+  };
+}