移除旧版 HTML 模板与兼容层，并完善私信、举报、媒体存储与 SEO。

Co-authored-by: Cursor <cursoragent@cursor.com>

handler/media.go

@@ -0,0 +1,70 @@
+package handler
+
+import (
+	"net/http"
+	"strconv"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+// APIAdminMedia 列出媒体资源
+func (h *Handlers) APIAdminMedia(c *gin.Context) {
+	if h.Store == nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "上传存储未初始化"})
+		return
+	}
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	size, _ := strconv.Atoi(c.DefaultQuery("size", "24"))
+	category := c.DefaultQuery("category", "all")
+	query := c.Query("q")
+	result, err := h.Store.ListMedia(category, query, page, size)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, result)
+}
+
+// APIAdminDeleteMedia 批量删除媒体
+func (h *Handlers) APIAdminDeleteMedia(c *gin.Context) {
+	if h.Store == nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "上传存储未初始化"})
+		return
+	}
+	var req struct {
+		URLs []string `json:"urls"`
+		URL  string   `json:"url"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "参数错误"})
+		return
+	}
+	urls := make([]string, 0, len(req.URLs)+1)
+	for _, u := range req.URLs {
+		u = strings.TrimSpace(u)
+		if u != "" {
+			urls = append(urls, u)
+		}
+	}
+	if u := strings.TrimSpace(req.URL); u != "" {
+		urls = append(urls, u)
+	}
+	if len(urls) == 0 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "请选择要删除的文件"})
+		return
+	}
+	if len(urls) > 100 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "单次最多删除 100 个文件"})
+		return
+	}
+	n, err := h.Store.DeleteMedia(urls)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{
+		"message": "已删除 " + strconv.Itoa(n) + " 项媒体",
+		"deleted": n,
+	})
+}