init: 毛孩子计划 小程序 + Go 后端 + 内嵌后台

- pets-fe: 微信原生小程序（首页/计划/记录/报告/社区/引导），
  服务端驱动、无假数据；弹层改用 scroll-view，打开时隐藏自定义 tabBar
- pets-be: Gin + GORM(MySQL, sundynix_ 前缀) + MinIO，统一响应/分页，
  微信 code2session 登录，provider-neutral AI(DeepSeek)，go:embed React 后台
- 修复：分段选择类型不匹配（字符串 vs 数字）导致选不中

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

pets-be/internal/handler/reminder.go

@@ -0,0 +1,85 @@
+package handler
+
+import (
+	"time"
+
+	"github.com/gin-gonic/gin"
+
+	"github.com/sundynix/pets-be/internal/middleware"
+	"github.com/sundynix/pets-be/internal/service"
+	"github.com/sundynix/pets-be/pkg/response"
+)
+
+type reminderReq struct {
+	Type        string `json:"type"`
+	Title       string `json:"title"`
+	NextDueDate string `json:"next_due_date"` // YYYY-MM-DD
+	Frequency   string `json:"frequency"`
+}
+
+// ListReminders GET /api/pets/:id/reminders
+func (h *Handler) ListReminders(c *gin.Context) {
+	reminders, err := h.svc.ListReminders(middleware.UserID(c), uintParam(c, "id"))
+	if err != nil {
+		respondErr(c, err)
+		return
+	}
+	response.OK(c, reminders)
+}
+
+// CreateReminder POST /api/pets/:id/reminders
+func (h *Handler) CreateReminder(c *gin.Context) {
+	var req reminderReq
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.FailParams(c, err.Error())
+		return
+	}
+	in := service.ReminderInput{Type: req.Type, Title: req.Title, Frequency: req.Frequency}
+	if req.NextDueDate != "" {
+		if t, err := time.Parse("2006-01-02", req.NextDueDate); err == nil {
+			in.NextDueDate = &t
+		}
+	}
+	r, err := h.svc.CreateReminder(middleware.UserID(c), uintParam(c, "id"), in)
+	if err != nil {
+		respondErr(c, err)
+		return
+	}
+	response.OK(c, r)
+}
+
+// UpdateReminder PUT /api/reminders/:id
+func (h *Handler) UpdateReminder(c *gin.Context) {
+	var req reminderReq
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.FailParams(c, err.Error())
+		return
+	}
+	fields := map[string]any{}
+	if req.Title != "" {
+		fields["title"] = req.Title
+	}
+	if req.Frequency != "" {
+		fields["frequency"] = req.Frequency
+	}
+	if req.NextDueDate != "" {
+		if t, err := time.Parse("2006-01-02", req.NextDueDate); err == nil {
+			fields["next_due_date"] = t
+		}
+	}
+	r, err := h.svc.UpdateReminder(middleware.UserID(c), uintParam(c, "id"), fields)
+	if err != nil {
+		respondErr(c, err)
+		return
+	}
+	response.OK(c, r)
+}
+
+// DeleteReminder DELETE /api/reminders/:id
+func (h *Handler) DeleteReminder(c *gin.Context) {
+	if err := h.svc.DeleteReminder(middleware.UserID(c), uintParam(c, "id")); err != nil {
+		respondErr(c, err)
+		return
+	}
+	response.OK(c, gin.H{"deleted": true})
+}