feat: 评论系统补充功能完成——图片上传、后台管理、通知跳转高亮

- 评论图片上传（LV4+，经验≥1500），JPEG/PNG 自动转 WebP，二进制搜索质量优化
- 后台评论管理页面，支持关键词搜索、分页、删除，侧边栏新增入口
- 通知跳转高亮：评论通知 RelatedID 改为 postID，消息页链接到 #comments，前端自动滚动
- 新增 adminCommentUseCase/commentStore 接口（遵循 ISP），AdminCommentRow 移至 model 层
- 前端 @mention 联想/图片上传光标插入/评论展开收起/内联回复交互完善

internal/controller/admin/admin_comment_controller.go

@@ -0,0 +1,66 @@
+package admin
+
+import (
+	"net/http"
+	"strconv"
+
+	"metazone.cc/metalab/internal/common"
+	"metazone.cc/metalab/internal/model"
+
+	"github.com/gin-gonic/gin"
+)
+
+// AdminCommentController 后台评论管理
+type AdminCommentController struct {
+	commentService adminCommentUseCase
+}
+
+// NewAdminCommentController 构造函数
+func NewAdminCommentController(cs adminCommentUseCase) *AdminCommentController {
+	return &AdminCommentController{commentService: cs}
+}
+
+// CommentsPage SSR 页面
+func (ctrl *AdminCommentController) CommentsPage(c *gin.Context) {
+	c.HTML(http.StatusOK, "admin/comments/index.html", common.BuildAdminPageData(c, gin.H{
+		"Title":    "评论管理",
+		"ExtraCSS": "/admin/static/css/comments.css",
+	}))
+}
+
+// ListComments API 列表
+func (ctrl *AdminCommentController) ListComments(c *gin.Context) {
+	keyword := c.Query("keyword")
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))
+
+	comments, total, err := ctrl.commentService.ListAllComments(keyword, false, page, pageSize)
+	if err != nil {
+		common.Error(c, http.StatusInternalServerError, "获取评论列表失败")
+		return
+	}
+	if comments == nil {
+		comments = []model.AdminCommentRow{}
+	}
+
+	common.Ok(c, gin.H{
+		"items":       comments,
+		"total":       total,
+		"page":        page,
+		"total_pages": common.PageCount(total, pageSize),
+	})
+}
+
+// Delete 软删除评论
+func (ctrl *AdminCommentController) Delete(c *gin.Context) {
+	commentID, err := strconv.ParseUint(c.Param("id"), 10, 64)
+	if err != nil {
+		common.Error(c, http.StatusBadRequest, "无效的评论ID")
+		return
+	}
+	if err := ctrl.commentService.Delete(uint(commentID)); err != nil {
+		common.Error(c, http.StatusBadRequest, err.Error())
+		return
+	}
+	common.OkMessage(c, "删除成功")
+}

internal/controller/admin/interfaces.go

@@ -46,3 +46,9 @@ type adminPostUseCase interface {
 	Unlock(postID uint) error
 	Restore(postID uint) error
 }
+
+// adminCommentUseCase AdminCommentController 对 CommentService 的最小依赖（ISP：2 个方法）
+type adminCommentUseCase interface {
+	ListAllComments(keyword string, showDeleted bool, page, pageSize int) ([]model.AdminCommentRow, int64, error)
+	Delete(commentID uint) error
+}