fix(i18n): correct svelte-i18n interpolation format

svelte-i18n requires { values: { key: value } } format for variable
interpolation, not { key: value } directly. Fixed across all toast
and greeting calls.

src/lib/components/views/HomeView.svelte

@@ -133,7 +133,7 @@
     if (info.type === 'custom') {
       return info.text;
     }
-    return $t(info.key, { name: info.name });
+    return $t(info.key, { values: { name: info.name } });
   });