fix: 优化页面恢复渲染并统一导航壳配色

- 延迟页面恢复后的版本检查，并移除常驻大面积背景模糊

- 统一侧栏、顶部工具栏和标签栏的导航壳背景色

easyflow-ui-admin/packages/effects/layouts/src/widgets/check-updates/check-updates.vue

@@ -20,6 +20,7 @@ const props = withDefaults(defineProps<Props>(), {
 });
 
 let isCheckingUpdates = false;
+let resumeCheckFrame: number | undefined;
 const currentVersionTag = ref('');
 const lastVersionTag = ref('');
 const timer = ref<ReturnType<typeof setInterval>>();
@@ -81,6 +82,7 @@ function handleNotice(versionTag: string) {
 }
 
 function start() {
+  stop();
   if (props.checkUpdatesInterval <= 0) {
     return;
   }
@@ -92,22 +94,47 @@ function start() {
   );
 }
 
-function handleVisibilitychange() {
-  if (document.hidden) {
-    stop();
-  } else {
-    if (!isCheckingUpdates) {
+function cancelResumeCheck() {
+  if (resumeCheckFrame === undefined) {
+    return;
+  }
+  cancelAnimationFrame(resumeCheckFrame);
+  resumeCheckFrame = undefined;
+}
+
+function scheduleResumeCheck() {
+  cancelResumeCheck();
+  // 页面恢复后先让浏览器完成两帧绘制，再发起版本检查请求。
+  resumeCheckFrame = requestAnimationFrame(() => {
+    resumeCheckFrame = requestAnimationFrame(() => {
+      resumeCheckFrame = undefined;
+      if (document.hidden || isCheckingUpdates) {
+        return;
+      }
       isCheckingUpdates = true;
       checkForUpdates().finally(() => {
         isCheckingUpdates = false;
         start();
       });
-    }
+    });
+  });
+}
+
+function handleVisibilitychange() {
+  if (document.hidden) {
+    cancelResumeCheck();
+    stop();
+  } else {
+    scheduleResumeCheck();
   }
 }
 
 function stop() {
+  if (timer.value === undefined) {
+    return;
+  }
   clearInterval(timer.value);
+  timer.value = undefined;
 }
 
 onMounted(() => {
@@ -116,6 +143,7 @@ onMounted(() => {
 });
 
 onUnmounted(() => {
+  cancelResumeCheck();
   stop();
   document.removeEventListener('visibilitychange', handleVisibilitychange);
 });