feat: add ItemOverviewDto for enriched item data in items list

feat: implement CustomerDetailPage for detailed customer view and editing

feat: create CustomersPage for listing and managing customers with filters

feat: add ColumnsMenu component for customizable table columns visibility

feat: implement CSV export functionality for data download

feat: add customer code generation logic for unique customer identifiers

Frontend/erp-system/app/layout.tsx

@@ -1,10 +1,10 @@
 import type { Metadata } from "next";
-import { Geist, Geist_Mono } from "next/font/google";
+import { Inter, Geist_Mono } from "next/font/google";
 import { Providers } from "@/components/providers";
 import "./globals.css";
 
-const geistSans = Geist({
-  variable: "--font-geist-sans",
+const inter = Inter({
+  variable: "--font-inter",
   subsets: ["latin"],
 });
 
@@ -26,7 +26,7 @@ export default function RootLayout({
   return (
     <html
       lang="en"
-      className={`${geistSans.variable} ${geistMono.variable} h-full antialiased`}
+      className={`${inter.variable} ${geistMono.variable} h-full antialiased`}
       data-scroll-behavior="smooth"
       suppressHydrationWarning
     >