refactor: 文件行数超标拆解（Service + Controller 9/16 完成）

- Service 层：energy_service → energize/operations/admin/query 四文件
- Service 层：post_service → helpers/audit + 核心 CRUD 保留
- Service 层：favorite_service → items + 核心文件夹操作保留
- Service 层：auth_service → password + 核心注册/登录保留
- Service 层：notification_service → notify + 核心列表/已读保留
- Service 层：audit_service → review + 核心列表/详情保留
- Controller 层：studio_controller → page/write/api/post_api/action 五文件
- Controller 层：post_controller → page/api/upload 三文件
- Controller 层：comment_controller → list/write/action/upload 四文件
- 清理未使用导入（notification_service.go 移除 fmt）

internal/controller/comment_controller.go

@@ -1,25 +1,5 @@
 package controller
 
-import (
-	"bytes"
-	"errors"
-	"image"
-	"image/jpeg"
-	"image/png"
-	"io"
-	"net/http"
-	"os"
-	"path/filepath"
-	"strconv"
-	"strings"
-	"time"
-
-	"metazone.cc/metalab/internal/common"
-	"metazone.cc/metalab/internal/model"
-
-	"github.com/gin-gonic/gin"
-)
-
 // CommentController 评论控制器
 type CommentController struct {
 	commentService commentUseCase
@@ -29,258 +9,3 @@ type CommentController struct {
 func NewCommentController(cs commentUseCase) *CommentController {
 	return &CommentController{commentService: cs}
 }
-
-// ListRootComments 获取文章顶级评论 GET /api/posts/:id/comments
-func (ctrl *CommentController) ListRootComments(c *gin.Context) {
-	postID, err := strconv.ParseUint(c.Param("id"), 10, 64)
-	if err != nil {
-		common.Error(c, http.StatusBadRequest, "无效的文章ID")
-		return
-	}
-
-	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
-	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))
-
-	comments, total, err := ctrl.commentService.ListRootComments(uint(postID), page, pageSize)
-	if err != nil {
-		common.Error(c, http.StatusInternalServerError, "获取评论失败")
-		return
-	}
-
-	common.Ok(c, gin.H{
-		"items":       comments,
-		"total":       total,
-		"page":        page,
-		"total_pages": common.PageCount(total, pageSize),
-	})
-}
-
-// ListReplies 获取顶级评论的全部回复 GET /api/posts/:id/comments/:root_id/replies
-func (ctrl *CommentController) ListReplies(c *gin.Context) {
-	rootID, err := strconv.ParseUint(c.Param("root_id"), 10, 64)
-	if err != nil {
-		common.Error(c, http.StatusBadRequest, "无效的评论ID")
-		return
-	}
-
-	replies, err := ctrl.commentService.ListReplies(uint(rootID))
-	if err != nil {
-		common.Error(c, http.StatusInternalServerError, "获取回复失败")
-		return
-	}
-
-	common.Ok(c, gin.H{"replies": replies})
-}
-
-// CreateRoot POST /api/posts/:id/comments
-func (ctrl *CommentController) CreateRoot(c *gin.Context) {
-	uid, _, ok := common.GetGinUser(c)
-	if !ok {
-		common.Error(c, http.StatusUnauthorized, "请先登录")
-		return
-	}
-
-	postID, err := strconv.ParseUint(c.Param("id"), 10, 64)
-	if err != nil {
-		common.Error(c, http.StatusBadRequest, "无效的文章ID")
-		return
-	}
-
-	var req struct {
-		Body string `json:"body" binding:"required"`
-	}
-	if err := c.ShouldBindJSON(&req); err != nil {
-		common.Error(c, http.StatusBadRequest, "请输入评论内容")
-		return
-	}
-
-	comment, err := ctrl.commentService.CreateRoot(uid, uint(postID), req.Body)
-	if err != nil {
-		common.Error(c, http.StatusBadRequest, err.Error())
-		return
-	}
-
-	common.Ok(c, comment)
-}
-
-// CreateReply POST /api/comments/:id/reply
-func (ctrl *CommentController) CreateReply(c *gin.Context) {
-	uid, _, ok := common.GetGinUser(c)
-	if !ok {
-		common.Error(c, http.StatusUnauthorized, "请先登录")
-		return
-	}
-
-	parentID, err := strconv.ParseUint(c.Param("id"), 10, 64)
-	if err != nil {
-		common.Error(c, http.StatusBadRequest, "无效的评论ID")
-		return
-	}
-
-	var req struct {
-		Body string `json:"body" binding:"required"`
-	}
-	if err := c.ShouldBindJSON(&req); err != nil {
-		common.Error(c, http.StatusBadRequest, "请输入回复内容")
-		return
-	}
-
-	reply, err := ctrl.commentService.CreateReply(uid, uint(parentID), req.Body)
-	if err != nil {
-		common.Error(c, http.StatusBadRequest, err.Error())
-		return
-	}
-
-	common.Ok(c, reply)
-}
-
-// Delete DELETE /api/comments/:id
-func (ctrl *CommentController) Delete(c *gin.Context) {
-	uid, role, ok := common.GetGinUser(c)
-	if !ok {
-		common.Error(c, http.StatusUnauthorized, "请先登录")
-		return
-	}
-
-	commentID, err := strconv.ParseUint(c.Param("id"), 10, 64)
-	if err != nil {
-		common.Error(c, http.StatusBadRequest, "无效的评论ID")
-		return
-	}
-
-	// 权限检查由 service 层统一处理
-	isAdmin := model.HasMinRole(role, model.RoleAdmin)
-	if err := ctrl.commentService.Delete(uint(commentID), uid, isAdmin); err != nil {
-		if errors.Is(err, common.ErrPermissionDenied) {
-			common.Error(c, http.StatusForbidden, err.Error())
-			return
-		}
-		common.Error(c, http.StatusBadRequest, err.Error())
-		return
-	}
-
-	common.OkMessage(c, "删除成功")
-}
-
-// SearchUsers GET /api/users/search?q=keyword
-func (ctrl *CommentController) SearchUsers(c *gin.Context) {
-	_, _, ok := common.GetGinUser(c)
-	if !ok {
-		common.Error(c, http.StatusUnauthorized, "请先登录")
-		return
-	}
-
-	q := c.Query("q")
-	if q == "" {
-		common.Ok(c, []model.UserSearchResult{})
-		return
-	}
-
-	users, err := ctrl.commentService.SearchUsers(q)
-	if err != nil {
-		common.Error(c, http.StatusInternalServerError, "搜索用户失败")
-		return
-	}
-
-	common.Ok(c, users)
-}
-
-// UploadImage 上传评论图片 POST /api/comments/upload-image
-// 需要 LV4+（Exp ≥ 1500），复用帖子图片上传的 WebP 转码逻辑
-func (ctrl *CommentController) UploadImage(c *gin.Context) {
-	uid, _, ok := common.GetGinUser(c)
-	if !ok {
-		common.Error(c, http.StatusUnauthorized, "请先登录")
-		return
-	}
-
-	// LV4+ 检查（Exp ≥ 1500）
-	expVal, exists := c.Get("exp")
-	if !exists {
-		common.Error(c, http.StatusForbidden, "无法获取经验值")
-		return
-	}
-	exp := expVal.(int)
-	if exp < 1500 {
-		common.Error(c, http.StatusForbidden, "需 Lv4 以上才能上传评论图片")
-		return
-	}
-
-	file, header, err := c.Request.FormFile("file")
-	if err != nil {
-		common.Error(c, http.StatusBadRequest, "请选择文件")
-		return
-	}
-	defer file.Close()
-
-	// 检查扩展名
-	ext := strings.ToLower(filepath.Ext(header.Filename))
-	allowedExt := map[string]bool{".jpg": true, ".jpeg": true, ".png": true, ".gif": true, ".webp": true}
-	if !allowedExt[ext] {
-		common.Error(c, http.StatusBadRequest, "仅支持 jpg/jpeg/png/gif/webp 格式")
-		return
-	}
-
-	// 限制 5MB
-	if header.Size > 5<<20 {
-		common.Error(c, http.StatusBadRequest, "图片大小不能超过 5MB")
-		return
-	}
-
-	data, err := io.ReadAll(file)
-	if err != nil {
-		common.Error(c, http.StatusInternalServerError, "读取文件失败")
-		return
-	}
-
-	storageDir := "storage/uploads/posts"
-	if err := os.MkdirAll(storageDir, 0755); err != nil {
-		common.Error(c, http.StatusInternalServerError, "存储初始化失败")
-		return
-	}
-
-	ts := time.Now().UnixMilli()
-	isJPEGPNG := ext == ".jpg" || ext == ".jpeg" || ext == ".png"
-
-	var savePath, url string
-
-	// JPEG/PNG 转 WebP
-	if isJPEGPNG {
-		img, _, err := image.Decode(bytes.NewReader(data))
-		if err != nil {
-			common.Error(c, http.StatusBadRequest, "图片格式无效")
-			return
-		}
-		webpData := encodeWebPBinary(img, len(data))
-		if webpData != nil && len(webpData) < len(data) {
-			filename := strconv.FormatUint(uint64(uid), 10) + "_" + strconv.FormatInt(ts, 10) + ".webp"
-			savePath = filepath.Join(storageDir, filename)
-			os.WriteFile(savePath, webpData, 0644)
-			url = "/uploads/posts/" + filename
-		}
-	}
-
-	// 回退存储
-	if savePath == "" {
-		dataOut := data
-		if isJPEGPNG {
-			decImg, _, decErr := image.Decode(bytes.NewReader(data))
-			if decErr == nil {
-				var buf bytes.Buffer
-				if ext == ".png" {
-					png.Encode(&buf, decImg)
-				} else {
-					jpeg.Encode(&buf, decImg, &jpeg.Options{Quality: 92})
-				}
-				dataOut = buf.Bytes()
-			}
-		}
-		filename := strconv.FormatUint(uint64(uid), 10) + "_" + strconv.FormatInt(ts, 10) + ext
-		savePath = filepath.Join(storageDir, filename)
-		os.WriteFile(savePath, dataOut, 0644)
-		url = "/uploads/posts/" + filename
-	}
-
-	// 返回标准 JSON（前端将 URL 插入评论文本）
-	common.Ok(c, gin.H{"url": url})
-}