chore: remove unused crypto util

frontend/package-lock.json

@@ -12,7 +12,6 @@
 				"@tailwindcss/vite": "^4.1.7",
 				"axios": "^1.8.2",
 				"clsx": "^2.1.1",
-        "crypto": "^1.0.1",
 				"jose": "^5.9.6",
 				"qrcode": "^1.5.4",
 				"sveltekit-superforms": "^2.23.1",
@@ -2362,12 +2361,6 @@
 				"node": ">= 8"
 			}
 		},
-    "node_modules/crypto": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/crypto/-/crypto-1.0.1.tgz",
-      "integrity": "sha512-VxBKmeNcqQdiUQUW2Tzq0t377b54N2bMtXO/qiLa+6eRRmmC4qT3D4OnTGoT/U6O9aklQ/jTwbOtRMTTY8G0Ig==",
-      "deprecated": "This package is no longer supported. It's now a built-in Node module. If you've depended on crypto, you should switch to the one that's built-in."
-    },
 		"node_modules/css.escape": {
 			"version": "1.5.1",
 			"resolved": "https://registry.npmjs.org/css.escape/-/css.escape-1.5.1.tgz",

frontend/package.json

@@ -17,7 +17,6 @@
 		"@tailwindcss/vite": "^4.1.7",
 		"axios": "^1.8.2",
 		"clsx": "^2.1.1",
-		"crypto": "^1.0.1",
 		"jose": "^5.9.6",
 		"qrcode": "^1.5.4",
 		"sveltekit-superforms": "^2.23.1",

frontend/src/lib/utils/crypto-util.ts

@@ -1,7 +0,0 @@
-export async function createSHA256hash(input: string) {
-	const msgUint8 = new TextEncoder().encode(input); // encode as (utf-8) Uint8Array
-	const hashBuffer = await crypto.subtle.digest('SHA-256', msgUint8); // hash the message
-	const hashArray = Array.from(new Uint8Array(hashBuffer)); // convert buffer to byte array
-	const hashHex = hashArray.map((b) => b.toString(16).padStart(2, '0')).join(''); // convert bytes to hex string
-	return hashHex;
-}