📊 Milestone 3: Expense Analysis, History & Enhancements

[RajkumarGara]

Goal:
Add analytics, history tracking, and final refinements for a complete user experience.

Features:

Expense Analysis Dashboard

• Visualize user expenses with charts and graphs:
  • Pie charts for user contribution.
  • Bar/line charts for category or date-based spending.
• Add filters (by user, bill, or date range).

History Management

• Store all past bills and expense data.
• Create “History” page showing:
  • Bill date, title, total amount, and participants.
• Allow users to reopen past bills for view or reuse.

Data Persistence & Sync

• Ensure all data is stored persistently in MongoDB.
• Enable IndexedDB caching for offline mode.
• Auto-sync when online connection is restored.

Configuration & Settings

• Store app configuration (API keys, constants) in JSON/YAML files.
• Add a settings page for managing API keys or preferences.

UI Enhancements

• Add loaders/spinners for OCR and sync processes.
• Include clean alerts for success and error states.
• Polish color palette, icons, and typography.

Final Testing & Optimization

• Test data synchronization and reactivity.
• Optimize performance for faster page loads.
• Final QA for both desktop and mobile.