fix: load Fira Sans/Code via CSS @import CDN instead of next/font/google (fixes Docker build)

app/layout.tsx

@@ -1,19 +1,11 @@
 import type { Metadata } from 'next';
-import { Fira_Sans, Fira_Code } from 'next/font/google';
 import './globals.css';
 import Providers from '@/components/providers';
 
-const firaSans = Fira_Sans({
-  subsets: ['latin'],
-  weight: ['300', '400', '500', '600', '700'],
-  variable: '--font-fira-sans',
-});
-
-const firaCode = Fira_Code({
-  subsets: ['latin'],
-  weight: ['400', '500', '600', '700'],
-  variable: '--font-fira-code',
-});
+// Fonts are loaded via Google Fonts CDN link in globals.css
+// to avoid build-time network dependency in Docker builds
+const firaSans = { variable: '--font-fira-sans', className: 'font-sans' };
+const firaCode = { variable: '--font-fira-code', className: 'font-mono' };
 
 export const metadata: Metadata = {
   title: 'FiberOps Admin',