Inti Deras Review + Lucky Draw System Improvement

Improvement added:
- Limit lucky draw to 1 prize per phone number per selected platform.
- Google, Facebook, Instagram and Optional/Internal feedback are counted separately.
- If the same phone number submits the same platform again, the system shows the previous prize and claim code instead of giving a new lucky draw.
- No database structure change is required.

Main changed file:
- index.php

How to update existing server:
1. Backup your current website files and database.
2. Replace your existing index.php with this improved index.php.
3. Or upload this full improved package if you have not installed the system yet.
