revert: remove language routing (was breaking navigation)

- Reverted app.routes.ts to original simple routing
- Removed language guard
- Language routing needs more comprehensive implementation

src/app/guards/language.guard.ts

@@ -1,56 +0,0 @@
-import { inject } from '@angular/core';
-import { CanActivateFn, Router, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
-import { LanguageService } from '../services/language.service';
-
-export const languageGuard: CanActivateFn = (
-  route: ActivatedRouteSnapshot,
-  state: RouterStateSnapshot
-) => {
-  const languageService = inject(LanguageService);
-  const router = inject(Router);
-  
-  const langParam = route.paramMap.get('lang');
-  
-  if (langParam) {
-    const validLanguage = languageService.languages.find(
-      l => l.code === langParam && l.enabled
-    );
-    
-    if (validLanguage) {
-      languageService.setLanguage(langParam);
-      return true;
-    } else {
-      // Invalid language code - redirect to default language
-      const currentLang = languageService.currentLanguage();
-      const pathWithoutLang = state.url.replace(`/${langParam}`, '');
-      router.navigate([`/${currentLang}${pathWithoutLang || '/'}`]);
-      return false;
-    }
-  }
-  
-  return true;
-};
-
-export const redirectToLanguageGuard: CanActivateFn = (
-  route: ActivatedRouteSnapshot,
-  state: RouterStateSnapshot
-) => {
-  const languageService = inject(LanguageService);
-  const router = inject(Router);
-  
-  // Check if URL already has language prefix
-  const firstSegment = state.url.split('/')[1];
-  const hasLangPrefix = languageService.languages.some(
-    l => l.code === firstSegment && l.enabled
-  );
-  
-  if (!hasLangPrefix) {
-    // Redirect to URL with language prefix
-    const currentLang = languageService.currentLanguage();
-    const newUrl = `/${currentLang}${state.url === '/' ? '' : state.url}`;
-    router.navigate([newUrl], { replaceUrl: true });
-    return false;
-  }
-  
-  return true;
-};