Refactor: Create Reusable UI Components for Repeated Elements

## Context
Frontend components (React/Inertia) may contain duplicated UI logic.

## Proposal
Abstract repeated UI patterns into reusable components (e.g., buttons, inputs, cards).

## Benefits
- DRY principle
- Easier maintenance
- Consistent UI

## Acceptance Criteria
- Identify duplicated JSX structures
- Extract into reusable components
- Replace duplicates across the app