fix(electron): whitescreen issue (#7742)

1. non-blurred mode whitescreen issue
2. should not close tab with cmd+w for pinned tabs

packages/frontend/electron/renderer/global.css

@@ -14,6 +14,10 @@ html {
   opacity: 0;
 }
 
+html[data-active='true'] {
+  opacity: 1;
+}
+
 html:is([data-active='false'], [data-dragging='true']) * {
   -webkit-app-region: no-drag !important;
 }

packages/frontend/electron/src/main/windows-manager/tab-views.ts

@@ -316,7 +316,7 @@ export class WebContentViewsManager {
   };
 
   closeTab = async (id?: string) => {
-    if (!id) {
+    if (!id && !this.activeWorkbenchMeta?.pinned) {
       id = this.activeWorkbenchId;
     }