fix: new tabs should not inherit pinned state from active tab (JS-8940)

Strip isPinned when creating a new tab via Cmd+T or "+" button so it
opens as a regular tab even when the active tab is pinned.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ra3orblade

electron/js/menu.js

@@ -240,8 +240,9 @@ class MenuManager {
 					{ label: Util.translate('electronMenuNewWindow'), accelerator: this.getAccelerator('newWindow'), click: () => WindowManager.createMain({ isChild: true }) },
 					{ label: Util.translate('electronMenuNewTab'), accelerator: this.getAccelerator('newTab'), click: () => {
 						const activeView = Util.getActiveView(this.win);
+						const { isPinned, ...data } = activeView?.data || {};
 
-						WindowManager.createTab(this.win, activeView?.data);
+						WindowManager.createTab(this.win, data);
 					}
 				},
 					{ label: Util.translate('electronMenuPrevTab'), accelerator: this.getAccelerator('prevTab'), click: () => WindowManager.prevTab(this.win) },