Update Biome and TailwindCSS configurations; remove unused font imports

frontend/biome.json

@@ -27,6 +27,11 @@
 			"react": "recommended"
 		}
 	},
+	"css": {
+		"parser": {
+			"tailwindDirectives": true
+		}
+	},
 	"assist": {
 		"actions": {
 			"source": {

frontend/package.json

@@ -15,7 +15,7 @@
 		"react-dom": "19.2.3"
 	},
 	"devDependencies": {
-		"@biomejs/biome": "2.2.0",
+		"@biomejs/biome": "2.3.11",
 		"@tailwindcss/postcss": "^4",
 		"@types/node": "^20",
 		"@types/react": "^19",

frontend/src/app/layout.tsx

@@ -1,5 +1,5 @@
 import type { Metadata } from "next";
-import { Geist, Geist_Mono, Ubuntu_Mono, Ubuntu_Sans } from "next/font/google";
+import { Ubuntu_Mono, Ubuntu_Sans } from "next/font/google";
 import "./globals.css";
 
 const ubuntuSans = Ubuntu_Sans({