test: Integration test for RandomHadithScreen & Add Integration Tests

[YassinNouh21]

✨ Description

The RandomHadithScreen needs layout optimizations, better responsiveness, and integration tests. The current implementation lacks proper Expanded usage, a unique Key for DisplayTextWidget.hadith, and automated UI tests.

📌 Problems

• Inefficient widget structure causing layout inconsistencies.
• No Key in DisplayTextWidget.hadith, making testing difficult.
• Missing integration tests for:
  • Hadith text rendering (LTR/RTL).
  • Handling of loading and error states.

🎯 Expected Outcome

• Use Expanded for better UI distribution.
• Ensure proper RTL/LTR text rendering.
• Handle loading and error states gracefully.
• Add integration tests.
• Assign a Key to DisplayTextWidget.hadith.
• Add integration_test to pubspec.yaml.