feat: Implement Advanced User Interface

[OSEH-svg]

PR - Advanced UI/UX Enhancements & Soroban Refactoring

Overview

This PR implements advanced UI/UX capabilities for the TeachLink mobile platform and performs a critical refactoring to ensure compliance with Soroban-specific constraints and enhance contract stability.

Key Changes

1. UI/UX Features

• Accessibility Support: Added metadata for screen readers, high contrast, and color-blind modes.
• Advanced Analytics: Implemented EngagementAnalytics and NetworkAnalytics for deep UX optimization.
• Personalization: Expanded MobileProfile with personalization options (theming, font scaling, etc.).
• Onboarding Tracking: Added multi-stage onboarding status tracking to improve user retention.
• Design System Integration: Created ComponentConfig to manage design tokens on-chain.

2. Stabilization & Soroban Compliance

• Symbol Optimization: Shortened internal symbols (e.g., mob_prof, off_cont) to meet the 9-character symbol_short! limit.
• Field Name Lengths: Adjusted struct fields (e.g., push_notif_response_rate) to satisfy the 30-character limit.
• Type Consolidation: Centralized mobile-related types in types.rs to resolve ScVal trait bound issues and eliminate multiple definition errors.
• Bug Fixes:
  • Corrected u32 to u64 type mismatches for ledger sequence IDs.
  • Updated storage().set() calls to pass values as references.
  • Fixed unresolved imports and ambiguous re-exports in lib.rs.

Verification Status

• cargo check: Passed with no errors or warnings.
• cargo test: Unit tests in test_mobile_platform.rs restored and passing.
• Accessibility: Verified metadata structures for WCAG compliance.

Files Modified

• contracts/teachlink/src/mobile_platform.rs (Implementation & Refactoring)
• contracts/teachlink/src/types.rs (Type Consolidation)
• contracts/teachlink/src/lib.rs (Import Synchronization)
• contracts/teachlink/tests/test_mobile_platform.rs (Verification)

---

closes #106

[github-actions]

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[OSEH-svg]

@OthmanImam please check this out

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LGTM