fix: fix all biome

src/flows/random/random.service.spec.ts

@@ -1,5 +1,4 @@
 import { TestBed } from '@/testing';
-import { vi } from 'vitest';
 import { LoggerService } from '../../logging/logger.service';
 import { mockProvider } from '../../testing/mock';
 import { CryptoService } from '../../utils/crypto/crypto.service';
@@ -12,9 +11,6 @@ describe('RandomService Tests', () => {
     TestBed.configureTestingModule({
       providers: [RandomService, mockProvider(LoggerService), CryptoService],
     });
-  });
-
-  beforeEach(() => {
     randomService = TestBed.inject(RandomService);
   });
 

src/flows/random/random.service.ts

@@ -1,5 +1,5 @@
-import { inject, Injectable } from 'injection-js';
-import { OpenIdConfiguration } from '../../config/openid-configuration';
+import { Injectable, inject } from 'injection-js';
+import type { OpenIdConfiguration } from '../../config/openid-configuration';
 import { LoggerService } from '../../logging/logger.service';
 import { CryptoService } from '../../utils/crypto/crypto.service';
 
@@ -37,7 +37,7 @@ export class RandomService {
   }
 
   private toHex(dec: number): string {
-    return ('0' + dec.toString(16)).substr(-2);
+    return `0${dec.toString(16)}`.substr(-2);
   }
 
   private randomString(length: number): string {