admin lists: server-side pagination + filters for accounts/users/cdks/showcase/banned-words (limit/offset/total; stats over full set; /showcase/admin flat paginated view; dead=1 accounts filter for bulk dead-delete)

backend/internal/http/handler/showcase.go

@@ -43,3 +43,40 @@ func (h *ShowcaseHandler) List(c *gin.Context) {
 	}
 	c.JSON(http.StatusOK, gin.H{"data": out})
 }
+
+// AdminList is the paginated flat view for the admin 首页内容 page — the public
+// List keeps its grouped shape for the home page, this one adds kind filter +
+// limit/offset/total. Order mirrors the old client flattening: hero → bento → work.
+func (h *ShowcaseHandler) AdminList(c *gin.Context) {
+	grouped, err := h.showcase.Grouped(c.Request.Context())
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"detail": "failed to load showcase"})
+		return
+	}
+	kindFilter := c.Query("kind") // "" | hero | bento | work
+	flat := make([]gin.H, 0, 16)
+	for _, kind := range []string{"hero", "bento", "work"} {
+		if kindFilter != "" && kind != kindFilter {
+			continue
+		}
+		for _, item := range grouped[kind] {
+			flat = append(flat, gin.H{
+				"id":         item.ID,
+				"kind":       item.Kind,
+				"title":      item.Title,
+				"subtitle":   item.Subtitle,
+				"prompt":     item.Prompt,
+				"gradient":   item.Gradient,
+				"span":       item.Span,
+				"image":      item.Image,
+				"weight":     item.Weight,
+				"created_at": item.CreatedAt,
+				"updated_at": item.UpdatedAt,
+			})
+		}
+	}
+	total := len(flat)
+	limit, offset := pageParams(c, 12)
+	page := pageSlice(flat, limit, offset)
+	c.JSON(http.StatusOK, gin.H{"data": page, "total": total, "limit": limit, "offset": offset})
+}