feat: 养护模板/社区运营/体重趋势/计划日历 + 雪花ID重构 + 文件表与图片上传

后端
- 主键改雪花字符串 ID（pkg/idgen + Base.BeforeCreate），全表外键/JWT/中间件随之调整
- 新增 files 表：/api/upload 按 MD5 去重，返回 {id,url,md5}，服务端只收图片
- 头像/记录附图/帖子图改 file_id 关联，读取解析为 URL
- 养护模板（物种×阶段）后台可配 + AI 生成草稿；建档按模板生成任务/计划/提醒
- 社区 AI 运营：虚拟账号池 + 每日定时/手动生成，帖子带 AI 标
- 计划路线图节点带真实日期；首页周历与计划日历同源；新增 day-plan 当日安排
- 体重趋势接口带备注；记录列表分页

小程序
- 公共图片上传 utils/upload.js（仅图片）；记录拍照/我的头像/社区发图三处接入
- 首页日历点选查当日任务；记录页体重趋势可点看备注 + 时间轴分页折叠
- 计划页日历点选查当日计划；自定义 tabBar 高度调整

后台（React）
- 新增「养护模板」「社区运营」页；用户管理加机器人筛选

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

pets-be/internal/service/home.go

@@ -19,6 +19,7 @@ type HomeInsight struct {
 type WeekDay struct {
 	Weekday string `json:"weekday"` // 一二三四五六日
 	Day     int    `json:"day"`
+	Date    string `json:"date"`    // YYYY-MM-DD，供首页点击查当日任务
 	Active  bool   `json:"active"`  // 是否今天
 	HasDot  bool   `json:"has_dot"` // 当天有任务/记录/提醒
 }
@@ -36,7 +37,7 @@ type HomeSummary struct {
 var weekdayCN = []string{"日", "一", "二", "三", "四", "五", "六"}
 
 // GetHomeSummary 计算首页汇总
-func (s *Service) GetHomeSummary(userID, petID uint) (*HomeSummary, error) {
+func (s *Service) GetHomeSummary(userID, petID string) (*HomeSummary, error) {
 	pet, err := s.ownedPet(userID, petID)
 	if err != nil {
 		return nil, err
@@ -54,7 +55,7 @@ func (s *Service) GetHomeSummary(userID, petID uint) (*HomeSummary, error) {
 	return res, nil
 }
 
-func (s *Service) userNickname(userID uint) string {
+func (s *Service) userNickname(userID string) string {
 	var u model.User
 	if err := s.db.Select("nickname").First(&u, userID).Error; err == nil && u.Nickname != "" {
 		return u.Nickname
@@ -76,7 +77,7 @@ func greeting(t time.Time, name string) string {
 	}
 }
 
-func (s *Service) homeInsights(petID uint, now time.Time) []HomeInsight {
+func (s *Service) homeInsights(petID string, now time.Time) []HomeInsight {
 	insights := make([]HomeInsight, 0, 3)
 	today := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
 
@@ -112,7 +113,7 @@ func (s *Service) homeInsights(petID uint, now time.Time) []HomeInsight {
 }
 
 // streakDays 从今天往前，连续有健康记录的天数
-func (s *Service) streakDays(petID uint, now time.Time) int {
+func (s *Service) streakDays(petID string, now time.Time) int {
 	streak := 0
 	day := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
 	for i := 0; i < 60; i++ {
@@ -129,7 +130,7 @@ func (s *Service) streakDays(petID uint, now time.Time) int {
 	return streak
 }
 
-func (s *Service) homeWeek(petID uint, now time.Time) []WeekDay {
+func (s *Service) homeWeek(petID string, now time.Time) []WeekDay {
 	// 本周一为起点
 	today := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
 	offset := (int(today.Weekday()) + 6) % 7 // 周一=0
@@ -143,6 +144,7 @@ func (s *Service) homeWeek(petID uint, now time.Time) []WeekDay {
 		week[i] = WeekDay{
 			Weekday: weekdayCN[int(d.Weekday())],
 			Day:     d.Day(),
+			Date:    d.Format("2006-01-02"),
 			Active:  d.Equal(today),
 			HasDot:  dotSet[d.Format("2006-01-02")],
 		}
@@ -151,7 +153,7 @@ func (s *Service) homeWeek(petID uint, now time.Time) []WeekDay {
 }
 
 // datesWithActivity 区间内有任务/记录/提醒的日期集合
-func (s *Service) datesWithActivity(petID uint, start, end time.Time) map[string]bool {
+func (s *Service) datesWithActivity(petID string, start, end time.Time) map[string]bool {
 	set := map[string]bool{}
 	var ts []time.Time
 	s.db.Model(&model.DailyTask{}).Where("pet_id = ? AND task_date >= ? AND task_date < ?", petID, start, end).Pluck("task_date", &ts)
@@ -170,10 +172,14 @@ func (s *Service) datesWithActivity(petID uint, start, end time.Time) map[string
 			set[r.NextDueDate.Format("2006-01-02")] = true
 		}
 	}
+	// 30 天计划路线图节点也算「有活动」，让首页周历与计划日历一致
+	for _, d := range s.planNodeDates(petID, start, end) {
+		set[d.Format("2006-01-02")] = true
+	}
 	return set
 }
 
-func (s *Service) todayCompletionPct(petID uint, now time.Time) int {
+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)
 	var total, done int64
@@ -214,7 +220,7 @@ type UserSummary struct {
 }
 
 // GetUserSummary 汇总当前用户名下计数
-func (s *Service) GetUserSummary(userID uint) (*UserSummary, error) {
+func (s *Service) GetUserSummary(userID string) (*UserSummary, error) {
 	var sum UserSummary
 	s.db.Model(&model.Pet{}).Where("user_id = ?", userID).Count(&sum.Pets)
 	s.db.Model(&model.HealthRecord{}).Where("user_id = ?", userID).Count(&sum.Records)