fix(be): 任务完成统计与留痕改用 PlanTask（DailyTask 已空）

- TogglePlanTask：完成无 sheet_type 的任务时补一条 note 记录，
  首页/计划页两条路径都统一留痕（ToggleTask 委托它）；去掉前端重复建记录
- 报告页「完成任务」原来统计空的 DailyTask 恒为 0，改成经 plan 关联
  统计 PlanTask 本周完成数；用户汇总的 tasksDone 同改
- 首页今日完成度 todayCompletionPct 同样从 DailyTask 改成今日 PlanTask

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

pets-be/internal/service/home.go

@@ -180,14 +180,22 @@ func (s *Service) datesWithActivity(petID string, start, end time.Time) map[stri
 }
 
 func (s *Service) todayCompletionPct(petID string, now time.Time) int {
-	start := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
-	end := start.AddDate(0, 0, 1)
+	// 任务是 PlanTask（DailyTask 已空）。取宠物的 active 30 天计划，算今天那天的完成占比
+	var plan model.Plan
+	if s.db.Where("pet_id = ? AND kind = ? AND status = ?", petID, model.PlanThirtyDay, "active").
+		Order("id desc").First(&plan).Error != nil {
+		return 0
+	}
+	day := dayIndexOf(&plan, now)
+	if day < 0 {
+		return 0
+	}
 	var total, done int64
-	s.db.Model(&model.DailyTask{}).Where("pet_id = ? AND task_date >= ? AND task_date < ?", petID, start, end).Count(&total)
+	s.db.Model(&model.PlanTask{}).Where("plan_id = ? AND day = ?", plan.ID, day).Count(&total)
 	if total == 0 {
 		return 0
 	}
-	s.db.Model(&model.DailyTask{}).Where("pet_id = ? AND task_date >= ? AND task_date < ? AND done = ?", petID, start, end, true).Count(&done)
+	s.db.Model(&model.PlanTask{}).Where("plan_id = ? AND day = ? AND done = ?", plan.ID, day, true).Count(&done)
 	return int(math.Round(float64(done) / float64(total) * 100))
 }
 

pets-be/internal/service/plan.go

@@ -23,7 +23,16 @@ func (s *Service) TogglePlanTask(userID, taskID string) error {
 	if err := s.db.Where("id = ? AND user_id = ?", pt.PlanID, userID).First(&plan).Error; err != nil {
 		return ErrNotFound
 	}
-	return s.db.Model(&model.PlanTask{}).Where("id = ?", taskID).Update("done", !pt.Done).Error
+	newDone := !pt.Done
+	if err := s.db.Model(&model.PlanTask{}).Where("id = ?", taskID).Update("done", newDone).Error; err != nil {
+		return err
+	}
+	// 勾选完成、且没关联记录类型的任务（自定义/无 sheet_type），补一条 note 记录，
+	// 让最近记录里留痕。有 sheet_type 的任务是走记录表单单独落记录的，这里不重复。
+	if newDone && pt.SheetType == "" {
+		_, _ = s.CreateRecord(userID, plan.PetID, RecordInput{Type: "note", Title: "完成：" + pt.Title})
+	}
+	return nil
 }
 
 // newStagePlan 按宠物当前阶段的养护模板生成一份 30 天计划（未保存）

pets-be/internal/service/report.go

@@ -26,9 +26,10 @@ func (s *Service) GetWeeklyReport(userID, petID string) (*WeeklyReport, error) {
 	}
 	weekAgo := time.Now().AddDate(0, 0, -7)
 
+	// 任务已并成 PlanTask（DailyTask 表已空），要经 plan 关联到宠物来统计本周完成数
 	var tasksCompleted int64
-	s.db.Model(&model.DailyTask{}).
-		Where("pet_id = ? AND done = ? AND updated_at >= ?", petID, true, weekAgo).
+	s.db.Model(&model.PlanTask{}).
+		Where("plan_id IN (SELECT id FROM sundynix_plans WHERE pet_id = ?) AND done = ? AND updated_at >= ?", petID, true, weekAgo).
 		Count(&tasksCompleted)
 
 	// 体重增长：最近 7 天最新 - 最早
@@ -215,7 +216,9 @@ func (s *Service) GetPoster(userID, petID string) (*Poster, error) {
 		return nil, err
 	}
 	var tasksDone, weightRecs, vaccineRecs int64
-	s.db.Model(&model.DailyTask{}).Where("pet_id = ? AND done = ?", petID, true).Count(&tasksDone)
+	s.db.Model(&model.PlanTask{}).
+		Where("plan_id IN (SELECT id FROM sundynix_plans WHERE pet_id = ?) AND done = ?", petID, true).
+		Count(&tasksDone)
 	s.db.Model(&model.HealthRecord{}).Where("pet_id = ? AND type = ?", petID, model.RecordWeight).Count(&weightRecs)
 	s.db.Model(&model.HealthRecord{}).Where("pet_id = ? AND type = ?", petID, model.RecordVaccine).Count(&vaccineRecs)