fix: 修复帖子系统5项缺陷 + 代码块插入位置/language-class/分割线占位

- 作者显示 用户名(UID): 修正Post.AuthorName GORM标签从 -:all 改为 -:migration;<-:false;column:author_name
- 审核流程: 帖子详情页新增"提交审核"按钮(draft/rejected时作者可见)
- 图片上传: 新增 POST /api/posts/upload-image 端点,限制5MB/jpg/png/gif/webp
- 代码块语言标注: 工具栏插入代码块时弹出语言输入框,生成 language-xxx class
- 状态中文显示: 管理后台/帖子详情页状态改为 PostStatusDisplayNames 映射
- 修复代码块插入位置错误: init时调用switchMode同步DOM; 无选区时appendChild; 防<pre>嵌套
- 修复 bluemonday.UGCPolicy() 剥离 code/pre 的 class 属性,显式 AllowAttrs("class")
- 修复分割线工具栏插入多余text占位符: hr/link/image以外不强制填占位文本

internal/controller/admin/admin_post_controller.go

@@ -49,16 +49,17 @@ func (ctrl *AdminPostController) PostsPage(c *gin.Context) {
 	if nextPage > totalPages { nextPage = totalPages }
 
 	c.HTML(http.StatusOK, "admin/posts/index.html", common.BuildAdminPageData(c, gin.H{
-		"Title":      "内容管理",
-		"Posts":      posts,
-		"Total":      total,
-		"Page":       p.Page,
-		"TotalPages": totalPages,
-		"PrevPage":   prevPage,
-		"NextPage":   nextPage,
-		"Keyword":    keyword,
-		"Status":     status,
-		"ExtraCSS":   "/admin/static/css/posts.css",
+		"Title":       "内容管理",
+		"Posts":       posts,
+		"Total":       total,
+		"Page":        p.Page,
+		"TotalPages":  totalPages,
+		"PrevPage":    prevPage,
+		"NextPage":    nextPage,
+		"Keyword":     keyword,
+		"Status":      status,
+		"StatusNames": model.PostStatusDisplayNames,
+		"ExtraCSS":    "/admin/static/css/posts.css",
 	}))
 }
 

internal/controller/post_controller.go

@@ -1,9 +1,15 @@
 package controller
 
 import (
+	"fmt"
 	"html/template"
+	"mime/multipart"
 	"net/http"
+	"os"
+	"path/filepath"
 	"strconv"
+	"strings"
+	"time"
 
 	"metazone.cc/metalab/internal/common"
 	"metazone.cc/metalab/internal/model"
@@ -107,6 +113,7 @@ func (ctrl *PostController) ShowPage(c *gin.Context) {
 		"Post":         post,
 		"PostBodyHTML": template.HTML(post.BodyHTML),
 		"UID":          uid,
+		"StatusNames":  model.PostStatusDisplayNames,
 		"ExtraCSS":     "/static/css/posts.css",
 	}))
 }
@@ -319,3 +326,83 @@ func (ctrl *PostController) PreviewAPI(c *gin.Context) {
 
 	common.Ok(c, gin.H{"html": html})
 }
+
+// allowedImageExt 允许的图片扩展名
+var allowedImageExt = map[string]bool{
+	".jpg": true, ".jpeg": true, ".png": true, ".gif": true, ".webp": true,
+}
+
+// UploadImage 上传帖子图片（需登录，multipart/form-data）
+func (ctrl *PostController) UploadImage(c *gin.Context) {
+	uidObj, _ := c.Get("uid")
+	uid, ok := uidObj.(uint)
+	if !ok {
+		common.Error(c, http.StatusUnauthorized, "请先登录")
+		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))
+	if !allowedImageExt[ext] {
+		common.Error(c, http.StatusBadRequest, "仅支持 jpg / jpeg / png / gif / webp 格式")
+		return
+	}
+
+	// 限制 5MB
+	maxSize := int64(5 << 20)
+	if header.Size > maxSize {
+		common.Error(c, http.StatusBadRequest, "图片大小不能超过 5MB")
+		return
+	}
+
+	// 存储路径
+	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
+	}
+
+	// 唯一文件名：uid_timestamp.ext
+	ts := time.Now().UnixMilli()
+	filename := fmt.Sprintf("%d_%d%s", uid, ts, ext)
+	savePath := filepath.Join(storageDir, filename)
+
+	if err := saveUploadedFile(file, savePath); err != nil {
+		common.Error(c, http.StatusInternalServerError, "保存图片失败")
+		return
+	}
+
+	url := "/uploads/posts/" + filename
+	common.Ok(c, gin.H{"url": url})
+}
+
+// saveUploadedFile 将 multipart.File 写入目标路径
+func saveUploadedFile(file multipart.File, dst string) error {
+	out, err := os.Create(dst)
+	if err != nil {
+		return err
+	}
+	defer out.Close()
+
+	// 限制读取 5MB 防止内存放大
+	buf := make([]byte, 32*1024)
+	for {
+		n, err := file.Read(buf)
+		if n > 0 {
+			if _, writeErr := out.Write(buf[:n]); writeErr != nil {
+				return writeErr
+			}
+		}
+		if err != nil {
+			break
+		}
+	}
+	return nil
+}