Major upgrade: Delivery management, daily reporting module, low-stock UI alert, and multiple UI enhancements

[SalmaSunaina]

This pull request introduces a comprehensive upgrade to the Inventory Management System, focusing on usability, operational efficiency, and enhanced administrative visibility.

✅ Key Enhancements Included

1. Delivery Management Module

• Added new UI and backend logic for managing outgoing deliveries.
• Includes delivery assignment, tracking, completion status, and reference logging.

2. Daily Reporting Summary

• Automatic daily report generation.
• Summaries include stock movement, sales overview, purchase updates, and low-stock counts.
• Designed for admin-level monitoring.

3. Low-Stock Alert Integration

• Added real-time low-stock detection using ProductDAO.
• Replaced pop-up alerts with a modern in-page alert box on the HomePage for better UX.
• Styled in red with an alert icon for better visibility.

4. UI/UX Improvements

• Enhanced HomePage layout with modern alert styling.
• Improved font hierarchy, spacing, and alignment across several screens.
• Updated color scheme and readability improvements.

5. Code Refactoring & Cleanup

• Improved DAO patterns across ProductDAO and UserDAO.
• Removed redundant logic and improved method naming.
• Added comments and better error handling.

📌 Why This Upgrade?

This update improves:

• Operational workflow
• Admin visibility
• User experience
• System reliability
• It modernizes the application and introduces essential business features.

🧪 Tested On

• Windows (Java Swing)
• MySQL 8.0

Tested flows: login → dashboard → stock update → purchase → sales → reports