feat(schedule): 待办提醒推送、行事历仅展示提醒与管理 API

单次提醒 worker 投递、local 时间写入校验、未来 7 天提醒列表与忽略/批量删除；行事历去掉事项重复展示。

Co-authored-by: Cursor <cursoragent@cursor.com>

mindspace.test.mjs

@@ -165,6 +165,44 @@ test('getSpace includes schedule snapshot when schedule service is available', a
         },
       ];
     },
+    async listUpcomingItems({ userId }) {
+      assert.equal(userId, 'user-1');
+      return [
+        {
+          id: 'item-2',
+          kind: 'event',
+          title: '早起跑步',
+          description: null,
+          status: 'active',
+          startAt: Date.UTC(2026, 6, 1, 22, 0, 0),
+          endAt: Date.UTC(2026, 6, 1, 22, 30, 0),
+          dueAt: null,
+          allDay: false,
+          timezone: 'Asia/Shanghai',
+          location: null,
+          createdAt: 11,
+          updatedAt: 21,
+        },
+      ];
+    },
+    async listUpcomingReminders({ userId }) {
+      assert.equal(userId, 'user-1');
+      return [
+        {
+          id: 'rem-1',
+          itemId: 'item-2',
+          itemTitle: '早起跑步',
+          itemKind: 'event',
+          itemTimezone: 'Asia/Shanghai',
+          itemStartAt: Date.UTC(2026, 6, 1, 22, 0, 0),
+          itemEndAt: Date.UTC(2026, 6, 1, 22, 30, 0),
+          remindAt: Date.UTC(2026, 6, 1, 21, 55, 0),
+          offsetMinutes: 5,
+          channel: 'wechat',
+          status: 'pending',
+        },
+      ];
+    },
     async listDigestSubscriptions({ userId, digestType, status }) {
       assert.equal(userId, 'user-1');
       assert.equal(digestType, 'todo_day');
@@ -189,6 +227,8 @@ test('getSpace includes schedule snapshot when schedule service is available', a
   const space = await service.getSpace('user-1');
 
   assert.equal(space.schedule.todayTodoItems[0].title, '跟进报价单');
+  assert.equal(space.schedule.upcomingItems[0].title, '早起跑步');
+  assert.equal(space.schedule.upcomingReminders[0].itemTitle, '早起跑步');
   assert.equal(space.schedule.digestSubscriptions[0].hour, 7);
 });