fix iOS back transition

src/components/PageTransition.vue

@@ -14,6 +14,7 @@
 import type { RouteLocationNormalized } from "vue-router";
 import { viewDepthKey } from "vue-router";
 import { useGlobalUIStore } from "@/store/globalUIStore";
+import { hasProgrammaticBackNavigation } from "@/utils/backNavigationSignal";
 
 defineOptions({
 	name: "PageTransition"
@@ -26,6 +27,8 @@ const viewDepth = inject(viewDepthKey, 0);
 
 const transitionName = ref("");
 const hasTransition = ref(false);
+// iOS 左滑返回由系统接管，页面侧不应叠加离场动画。
+const isIOS = /iP(ad|hone|od)/i.test(window.navigator.userAgent);
 const pageBackground = computed(() => globalUIStore.bodyBackground);
 const currentDepth = computed(() => Number(unref(viewDepth)));
 const pageKey = computed(() => {
@@ -72,6 +75,17 @@ const unregisterGuard = router.beforeEach((to, from) => {
 
 	const toDepth = calcDepth(to);
 	const fromDepth = calcDepth(from);
+	const isBackwardNavigation = toDepth < fromDepth;
+	// 主动触发的返回（如导航栏返回）保留动画。
+	const isProgrammaticBack = hasProgrammaticBackNavigation();
+	// 仅在 iOS 系统返回手势下关闭动画。
+	const shouldDisableTransition = isIOS && isBackwardNavigation && !isProgrammaticBack;
+
+	if (shouldDisableTransition) {
+		transitionName.value = "";
+		hasTransition.value = false;
+		return;
+	}
 
 	if (fromDepth < toDepth) {
 		transitionName.value = "push-left";