Manage Data Flows Project 1.3

Description:

This PR implements data flow on mobile app for assessment. The following features have been completed.

Map Screen:

• Fetches events from the API when online; falls back to cached events via AsyncStorage when offline.
• Displays only future events as map markers.
• Bottom label shows the actual number of future events.
• Map automatically zooms/fits to include all future events markers.

Event Creation Workflow:

• Accessible via the + button on the map screen.
• Includes mandatory fields: title, description, date/time, location, and photo.
• Form validation prevents saving until all fields are complete and valid.
• Camera & media library permissions handled.
• Image uploads to online storage (imageUrl saved in event data) and displays thumbnail, file name, and size.
• Saves the new event to the backend and updates the map to include it.

Other notes:

• All async flows, caching, and network handling follow best practices.
• Tested offline/online scenarios, form validation, and image upload.
• App styling follows the Figma prototype design.