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/plan.go

@@ -0,0 +1,111 @@
+package handler
+
+import (
+	"time"
+
+	"github.com/gin-gonic/gin"
+
+	"github.com/sundynix/pets-be/internal/middleware"
+	"github.com/sundynix/pets-be/pkg/response"
+)
+
+// ListTasks GET /api/pets/:id/tasks?date=YYYY-MM-DD
+func (h *Handler) ListTasks(c *gin.Context) {
+	var date *time.Time
+	if q := c.Query("date"); q != "" {
+		if t, err := time.Parse("2006-01-02", q); err == nil {
+			date = &t
+		}
+	}
+	tasks, err := h.svc.ListTasks(middleware.UserID(c), uintParam(c, "id"), date)
+	if err != nil {
+		respondErr(c, err)
+		return
+	}
+	response.OK(c, tasks)
+}
+
+// ToggleTask POST /api/tasks/:id/toggle
+func (h *Handler) ToggleTask(c *gin.Context) {
+	task, err := h.svc.ToggleTask(middleware.UserID(c), uintParam(c, "id"))
+	if err != nil {
+		respondErr(c, err)
+		return
+	}
+	response.OK(c, task)
+}
+
+// CompleteAllTasks POST /api/pets/:id/tasks/complete-all
+func (h *Handler) CompleteAllTasks(c *gin.Context) {
+	tasks, err := h.svc.CompleteAllTasks(middleware.UserID(c), uintParam(c, "id"))
+	if err != nil {
+		respondErr(c, err)
+		return
+	}
+	response.OK(c, tasks)
+}
+
+// GetPlan GET /api/pets/:id/plan
+func (h *Handler) GetPlan(c *gin.Context) {
+	plan, err := h.svc.GetPlan(middleware.UserID(c), uintParam(c, "id"))
+	if err != nil {
+		respondErr(c, err)
+		return
+	}
+	response.OK(c, plan)
+}
+
+// PlanCalendar GET /api/pets/:id/plan/calendar?month=YYYY-MM
+func (h *Handler) PlanCalendar(c *gin.Context) {
+	now := time.Now()
+	year, month := now.Year(), int(now.Month())
+	if q := c.Query("month"); q != "" {
+		if t, err := time.Parse("2006-01", q); err == nil {
+			year, month = t.Year(), int(t.Month())
+		}
+	}
+	res, err := h.svc.Calendar(middleware.UserID(c), uintParam(c, "id"), year, month)
+	if err != nil {
+		respondErr(c, err)
+		return
+	}
+	response.OK(c, res)
+}
+
+type aiPlanReq struct {
+	Input string `json:"input"`
+}
+
+// CreateAIPlan POST /api/pets/:id/ai-plan
+func (h *Handler) CreateAIPlan(c *gin.Context) {
+	var req aiPlanReq
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.FailParams(c, err.Error())
+		return
+	}
+	plan, err := h.svc.CreateAIPlan(middleware.UserID(c), uintParam(c, "id"), req.Input)
+	if err != nil {
+		respondErr(c, err)
+		return
+	}
+	response.OK(c, plan)
+}
+
+// ApplyAIPlan POST /api/ai-plan/:id/apply
+func (h *Handler) ApplyAIPlan(c *gin.Context) {
+	plan, err := h.svc.ApplyAIPlan(middleware.UserID(c), uintParam(c, "id"))
+	if err != nil {
+		respondErr(c, err)
+		return
+	}
+	response.OK(c, plan)
+}
+
+// TogglePlanTask POST /api/plan-tasks/:id/toggle
+func (h *Handler) TogglePlanTask(c *gin.Context) {
+	if err := h.svc.TogglePlanTask(middleware.UserID(c), uintParam(c, "id")); err != nil {
+		respondErr(c, err)
+		return
+	}
+	response.OK(c, gin.H{"ok": true})
+}