fix: 移除Header Tab栏(与侧边栏重复); 修复approve/reject 400(ApproveRequest去掉required binding)

backend/internal/models/approval.go

@@ -94,7 +94,7 @@ type CreateApprovalProcessRequest struct {
 
 // ApproveRequest 审批请求
 type ApproveRequest struct {
-	Status string `json:"status" binding:"required,oneof=approved rejected"`
+	Status string `json:"status"`
 	Comment string `json:"comment"`
 }