Modify $fetch imports to come from util in Prividium Mode

[tomimor]

🌟 Feature Request

📝 Description

Implement consistent importing of $fetch across the entire codebase by centralizing all imports to come from @/utils/useFetch.tsx.

🤔 Rationale

Standardizing $fetch imports will:

• Reduce technical debt and improve maintainability
• Prevent potential inconsistencies in fetch behavior