Fix FN_URL in podcast.ts to use runtime config

src/lib/podcast.ts

@@ -1,7 +1,7 @@
-import { supabase } from "@/integrations/supabase/client";
+import { supabase, SUPABASE_URL } from "@/integrations/supabase/client";
 
 const FN_URL = (name: string) =>
-  `${import.meta.env.VITE_SUPABASE_URL}/functions/v1/${name}`;
+  `${SUPABASE_URL}/functions/v1/${name}`;
 
 export async function generatePodcast(documentId: string): Promise<{ ok: boolean; status: string }> {
   const { data: { session } } = await supabase.auth.getSession();