fix: remove useTheme from Sonner (useContext null crash on global-error prerender)

src/app/global-error.tsx

@@ -1,8 +1,11 @@
 "use client";
 
 // global-error.tsx — Next.js special page, rendered OUTSIDE the root layout.
-// It must be fully self-contained: no ThemeProvider, no Sonner, no context hooks.
-// Replaces the entire <html> + <body> tree when a global error occurs.
+// Must be fully self-contained: no ThemeProvider, no Sonner, no context hooks.
+// dynamic = 'force-dynamic' prevents static prerendering which crashes because
+// the build tries to resolve the full module graph including layout providers.
+
+export const dynamic = "force-dynamic";
 
 export default function GlobalError({
   error,