修复页面可能会换行的bug.

src/views/runtime.vue

@@ -248,11 +248,13 @@ onBeforeUnmount(() => {
   justify-content: space-between;
 }
 .header .go-back {
-  max-width: 40%;
   overflow: hidden;
   white-space: nowrap;
   text-overflow: ellipsis;
 }
+.time {
+  flex-shrink: 0; /* 让宽度不会被压缩 */
+}
 .canvas-main {
   margin: 0 8px;
   height: calc(100% - 80px);