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/community.go

@@ -0,0 +1,130 @@
+package handler
+
+import (
+	"github.com/gin-gonic/gin"
+	"gorm.io/datatypes"
+
+	"github.com/sundynix/pets-be/internal/middleware"
+	"github.com/sundynix/pets-be/internal/service"
+	"github.com/sundynix/pets-be/pkg/response"
+)
+
+type postListReq struct {
+	response.PageQuery
+	Tab string `form:"tab"`
+}
+
+// ListPosts GET /api/posts?tab=&page=&page_size=
+func (h *Handler) ListPosts(c *gin.Context) {
+	var req postListReq
+	_ = c.ShouldBindQuery(&req)
+	req.Normalize()
+
+	posts, total, err := h.svc.ListPosts(req.Tab, req.Offset(), req.Limit())
+	if err != nil {
+		response.FailErr(c, err)
+		return
+	}
+	response.OK(c, response.NewPage(posts, total, req.PageQuery))
+}
+
+// GetPost GET /api/posts/:id
+func (h *Handler) GetPost(c *gin.Context) {
+	post, err := h.svc.GetPost(uintParam(c, "id"))
+	if err != nil {
+		respondErr(c, err)
+		return
+	}
+	response.OK(c, post)
+}
+
+type postReq struct {
+	PetID    *uint    `json:"pet_id"`
+	Identity string   `json:"identity"`
+	Content  string   `json:"content"`
+	Tags     []string `json:"tags"`
+	Images   []string `json:"images"`
+}
+
+// CreatePost POST /api/posts
+func (h *Handler) CreatePost(c *gin.Context) {
+	var req postReq
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.FailParams(c, err.Error())
+		return
+	}
+	in := service.PostInput{PetID: req.PetID, Identity: req.Identity, Content: req.Content}
+	if b, err := jsonMarshal(req.Tags); err == nil {
+		in.Tags = datatypes.JSON(b)
+	}
+	if b, err := jsonMarshal(req.Images); err == nil {
+		in.Images = datatypes.JSON(b)
+	}
+	post, err := h.svc.CreatePost(middleware.UserID(c), in)
+	if err != nil {
+		response.FailErr(c, err)
+		return
+	}
+	response.OK(c, post)
+}
+
+// LikePost POST /api/posts/:id/like
+func (h *Handler) LikePost(c *gin.Context) {
+	count, err := h.svc.LikePost(middleware.UserID(c), uintParam(c, "id"))
+	if err != nil {
+		respondErr(c, err)
+		return
+	}
+	response.OK(c, gin.H{"like_count": count})
+}
+
+// UnlikePost DELETE /api/posts/:id/like
+func (h *Handler) UnlikePost(c *gin.Context) {
+	count, err := h.svc.UnlikePost(middleware.UserID(c), uintParam(c, "id"))
+	if err != nil {
+		respondErr(c, err)
+		return
+	}
+	response.OK(c, gin.H{"like_count": count})
+}
+
+type commentListReq struct {
+	response.PageQuery
+}
+
+// ListComments GET /api/posts/:id/comments
+func (h *Handler) ListComments(c *gin.Context) {
+	var req commentListReq
+	_ = c.ShouldBindQuery(&req)
+	req.Normalize()
+
+	comments, total, err := h.svc.ListComments(uintParam(c, "id"), req.Offset(), req.Limit())
+	if err != nil {
+		response.FailErr(c, err)
+		return
+	}
+	response.OK(c, response.NewPage(comments, total, req.PageQuery))
+}
+
+type commentReq struct {
+	Content string `json:"content"`
+}
+
+// CreateComment POST /api/posts/:id/comments
+func (h *Handler) CreateComment(c *gin.Context) {
+	var req commentReq
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.FailParams(c, err.Error())
+		return
+	}
+	if req.Content == "" {
+		response.FailParams(c, "评论内容不能为空")
+		return
+	}
+	comment, err := h.svc.CreateComment(middleware.UserID(c), uintParam(c, "id"), req.Content)
+	if err != nil {
+		respondErr(c, err)
+		return
+	}
+	response.OK(c, comment)
+}