fix: CopiedToast not visible due to CSS transform context

Use createPortal to render toast at document.body level,
escaping framer-motion's transform on the tab content wrapper.
Remove unused useRef import and shareToastTapCopy i18n key.

src/locales/en.json

@@ -4249,7 +4249,6 @@
     "shareModalActivateVia": "Activate via bot:",
     "shareModalActivateViaCabinet": "Or via website:",
     "copyMessage": "Copy message",
-    "shareToastCopied": "Message copied",
-    "shareToastTapCopy": "tap to copy again"
+    "shareToastCopied": "Message copied"
   }
 }