feat: add admin risk actions and arbitration settlement

backend/internal/modules/listing/handler.go

@@ -101,6 +101,50 @@ func (h *Handler) ListAdmin(c *gin.Context) {
 	response.OK(c, gin.H{"items": items})
 }
 
+func (h *Handler) FindAdmin(c *gin.Context) {
+	id, ok := parseID(c)
+	if !ok {
+		return
+	}
+	item, err := h.service.FindAdmin(id)
+	if err != nil {
+		writeListingError(c, err)
+		return
+	}
+	response.OK(c, item)
+}
+
+func (h *Handler) AdminOffline(c *gin.Context) {
+	h.adminAction(c, h.service.AdminOffline)
+}
+
+func (h *Handler) AdminMarkAbnormal(c *gin.Context) {
+	h.adminAction(c, h.service.AdminMarkAbnormal)
+}
+
+func (h *Handler) adminAction(c *gin.Context, fn func(uint64, uint64, AdminActionRequest, AuditMeta) (*ListingDTO, error)) {
+	adminID, ok := currentAdminID(c)
+	if !ok {
+		response.Unauthorized(c, "缺少管理员上下文")
+		return
+	}
+	id, ok := parseID(c)
+	if !ok {
+		return
+	}
+	var req AdminActionRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.BadRequest(c, "操作原因不能为空")
+		return
+	}
+	item, err := fn(adminID, id, req, AuditMeta{IP: c.ClientIP(), UserAgent: c.GetHeader("User-Agent")})
+	if err != nil {
+		writeListingError(c, err)
+		return
+	}
+	response.OK(c, item)
+}
+
 func (h *Handler) Approve(c *gin.Context) {
 	id, ok := parseID(c)
 	if !ok {
@@ -212,6 +256,15 @@ func currentUserID(c *gin.Context) (uint64, bool) {
 	return userID, ok
 }
 
+func currentAdminID(c *gin.Context) (uint64, bool) {
+	value, ok := c.Get(middleware.ContextAdminID)
+	if !ok {
+		return 0, false
+	}
+	adminID, ok := value.(uint64)
+	return adminID, ok
+}
+
 func parseID(c *gin.Context) (uint64, bool) {
 	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
 	if err != nil || id == 0 {