refactor: standardize string quotes and improve code readability across multiple files

- Updated string quotes from single to double in useRecommendationProfile.ts, client.ts, recommendationService.ts, and recommendations.ts for consistency.
- Enhanced error handling and logging in API client and recommendation service.
- Improved code structure and formatting for better readability and maintainability.
- Ensured consistent use of semicolons and spacing throughout the codebase.

src/components/RepoHubApp.tsx

@@ -20,7 +20,7 @@ function RepoHubAppContent({ cryptomusEnabled }: { cryptomusEnabled: boolean })
   const [selectedPlatform, setSelectedPlatform] = useState<Platform | null>(null)
   const [selectedPackages, setSelectedPackages] = useState<SelectedPackage[]>([])
   const [generatedScript, setGeneratedScript] = useState<GeneratedScript | null>(null)
-  
+
   // Recommendation profile management
   const {
     profile,
@@ -30,7 +30,7 @@ function RepoHubAppContent({ cryptomusEnabled }: { cryptomusEnabled: boolean })
     saveProfile,
     detectedOS
   } = useRecommendationProfile()
-  
+
   const [showOnboarding, setShowOnboarding] = useState(false)
 
   // Show onboarding modal on first visit