Duplicate route defination

[Nabeelahh]

closes #47

Overview
This PR resolves the code duplication issue where screen components existed in both src/screens/ and app/ directories, causing maintenance overhead and routing confusion.

🎯 Background

Screens were previously defined in two locations:

• src/screens/*.tsx - Legacy screen components
• app/(tabs)/ and app/*.tsx - Expo Router screens

This duplication required developers to maintain two versions of the same screens, leading to:

• Inconsistent UI between routes
• Increased maintenance burden
• Confusion about which file to modify

✅ Changes Made

• Removed all duplicate screen definitions from src/screens/ directory
• Migrated all unique screen components to app/ directory following Expo Router conventions
• Updated import paths to reflect new screen locations
• Verified routing works correctly with consolidated structure

📁 Impacted Files

Removed:

• src/screens/*.tsx (all screen components)

Modified:

• app/(tabs)/ - Updated to use migrated screen components
• app/*.tsx - Consolidated route files