[PoW] Architecture: Typed Frappe API Client and Secure Authentication Layer

[rohansaini-02]

Ref: #1

We need a centralized API client for communicating with TAP's Frappe-based LMS backend.

Frappe uses token-based authentication (api_key:api_secret) and DocType-driven REST APIs, so handling authentication, request setup, and response parsing in one place will keep the mobile codebase cleaner and easier to maintain.

Scope

• Store api_key and api_secret securely using react-native-keychain
• Create a reusable Axios client that automatically attaches the Authorization: token api_key:api_secret header
• Handle 401 and 403 responses centrally
• Define TypeScript interfaces for:
  • LMS Course
  • LMS Lesson
  • LMS Assignment Submission
• Build a small login PoC that authenticates a user and fetches their profile

Deliverables

• Integrate react-native-keychain
• Implement the FrappeAPI client with interceptors
• Add TypeScript models for core LMS DocTypes
• Create a login and profile fetch proof of concept

Expected Outcome

A secure, typed, and reusable API layer that serves as the foundation for all LMS-related network calls in the React Native app.