fix(admin): 添加管理操作错误处理及更新模板样式

- 管理后台帖子与用户审核操作中添加失败错误重定向处理
- 管理后台帖子、用户、评论删除操作中添加错误检查及提示
- 用户角色更新操作失败时添加错误重定向
- 用户封禁通知失败时添加相应错误提示
- 登录登出时session保存加入错误处理
- 讨论区上传目录创建失败时显示错误提示
- 移除admin_dashboard.html多余样式及修正侧边栏当前页高亮
- admin_posts.html和admin_users.html添加状态样式动态使用的隐藏span元素
- admin_users.html为角色选择添加label以提升无障碍性
- 升级项目依赖版本，包含gin、gorm、validator等核心库版本更新

internal/controllers/home.go

@@ -4,11 +4,12 @@ import (
 	"net/http"
 	"path/filepath"
 
-	"github.com/gin-contrib/sessions"
-	"github.com/gin-gonic/gin"
 	"lv8girl/internal/middleware"
 	"lv8girl/internal/repositories"
 	"lv8girl/internal/services"
+
+	"github.com/gin-contrib/sessions"
+	"github.com/gin-gonic/gin"
 )
 
 type HomeController struct {
@@ -36,7 +37,7 @@ func (c *HomeController) Index(ctx *gin.Context) {
 
 	if isLoggedIn {
 		userRepo := repositories.NewUserRepository()
-		userRepo.UpdateLastActive(userID)
+		_ = userRepo.UpdateLastActive(userID)
 	}
 
 	posts, _ := c.discussionSvc.GetApprovedPosts(30)
@@ -86,10 +87,10 @@ func (c *HomeController) ShowPost(ctx *gin.Context) {
 	}
 
 	if !viewedMap[postID] {
-		c.discussionSvc.IncrementViews(postID)
+		_ = c.discussionSvc.IncrementViews(postID)
 		viewedMap[postID] = true
 		session.Set(viewedKey, viewedMap)
-		session.Save()
+		_ = session.Save()
 	}
 
 	detail, err := c.discussionSvc.GetPostDetail(postID, userID)
@@ -129,7 +130,7 @@ func (c *HomeController) LikePost(ctx *gin.Context) {
 	}
 
 	postID := parseUint(ctx.Param("id"))
-	c.discussionSvc.AddLike(postID, userID)
+	_ = c.discussionSvc.AddLike(postID, userID)
 	ctx.Redirect(http.StatusFound, "/post/"+ctx.Param("id"))
 }
 
@@ -144,7 +145,7 @@ func (c *HomeController) AddComment(ctx *gin.Context) {
 	content := ctx.PostForm("content")
 
 	if content != "" {
-		c.discussionSvc.AddComment(postID, userID, content)
+		_ = c.discussionSvc.AddComment(postID, userID, content)
 	}
 
 	ctx.Redirect(http.StatusFound, "/post/"+ctx.Param("id"))