feat: 展示 TaskTree 分组完成度

internal/tasktree/contracts.ts

@@ -54,6 +54,7 @@ export type TaskGroupOverview = {
   taskCount: number;
   subtaskCount: number;
   subsubtaskCount: number;
+  completedCount: number;
   reportCount: number;
   startAt: string | null;
   dueAt: string | null;

internal/tasktree/store.ts

@@ -145,6 +145,7 @@ export class TaskTreeStore {
         COUNT(DISTINCT t.id) FILTER (WHERE t.kind='task')::int AS task_count,
         COUNT(DISTINCT t.id) FILTER (WHERE t.kind='subtask')::int AS subtask_count,
         COUNT(DISTINCT t.id) FILTER (WHERE t.kind='subsubtask')::int AS subsubtask_count,
+        COUNT(DISTINCT t.id) FILTER (WHERE t.status='completed')::int AS completed_count,
         COUNT(DISTINCT r.id)::int AS report_count,
         MIN(CASE
           WHEN t.id IS NULL THEN NULL
@@ -696,7 +697,7 @@ async function schemaIsCurrent(pool: pg.Pool): Promise<boolean> {
 }
 
 function groupRow(row: any): TaskGroup { return { id: row.id, name: row.name, description: row.description, createdAt: iso(row.created_at), updatedAt: iso(row.updated_at) }; }
-function overviewRow(row: any): TaskGroupOverview { return { group: groupRow(row), taskCount: Number(row.task_count), subtaskCount: Number(row.subtask_count), subsubtaskCount: Number(row.subsubtask_count), reportCount: Number(row.report_count), startAt: nullableIso(row.start_at), dueAt: nullableIso(row.due_at) }; }
+function overviewRow(row: any): TaskGroupOverview { return { group: groupRow(row), taskCount: Number(row.task_count), subtaskCount: Number(row.subtask_count), subsubtaskCount: Number(row.subsubtask_count), completedCount: Number(row.completed_count), reportCount: Number(row.report_count), startAt: nullableIso(row.start_at), dueAt: nullableIso(row.due_at) }; }
 function taskRow(row: any): TaskItem { return { id: row.id, groupId: row.group_id, parentId: row.parent_id, kind: row.kind, title: row.title, description: row.description, status: row.status, startAt: nullableIso(row.start_at), dueAt: nullableIso(row.due_at), sortOrder: row.sort_order, createdAt: iso(row.created_at), updatedAt: iso(row.updated_at) }; }
 function milestoneRow(row: any): Milestone { return { id: row.id, groupId: row.group_id, taskId: row.task_id, title: row.title, occursAt: iso(row.occurs_at), createdAt: iso(row.created_at) }; }
 function reportRow(row: any): ExecutionReport { return { id: row.id, taskId: row.task_id, title: row.title, body: row.body, status: row.status, createdAt: iso(row.created_at) }; }

internal/tasktree/tasktree.test.ts

@@ -217,6 +217,7 @@ test("native PostgreSQL store exposes overview and three task levels", async ()
     assert.equal(overview?.taskCount, 1);
     assert.equal(overview?.subtaskCount, 3);
     assert.equal(overview?.subsubtaskCount, 1);
+    assert.equal(overview?.completedCount, 1);
     assert.equal(overview?.reportCount, 1);
     assert.equal(overview?.startAt, new Date(timelineStart).toISOString());
     assert.equal(overview?.dueAt, new Date(timelineDue).toISOString());