Chehan branch

[chehanw]

Initial HomeFlow app scaffold (Spezi Vibe)

♻️ Current situation & Problem

This PR sets up the initial scaffold for the HomeFlow app using the Spezi Vibe template.
Before this, the repo didn’t have an app structure, shared spec, or baseline tooling for development, which made it hard to start building in a coordinated way.

This PR is meant to establish a clean starting point for the team. There are no related issues or PRs yet since this is the initial setup.

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⚙️ Release Notes

• Scaffolded the HomeFlow app using the Spezi Vibe framework
• Set up the core React Native + Expo project structure
• Added a Product Requirements Document (PRD) to define scope, goals, and constraints
• Added CI checks to run TypeScript type checking and basic build validation on PRs

This PR does not introduce any breaking changes. It just initializes the project.

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📚 Documentation

• Added docs/PRD.md, which outlines:
  • The problem we’re addressing and target users
  • Enrollment and consent flow
  • Data sources, assumptions, and constraints
  • Research-focused scope for CS342
• The PRD is intended to act as the main spec and reference point for future development and AI-assisted work

Additional documentation and inline comments will be added as features are implemented.

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✅ Testing

• CI currently runs TypeScript type checking (tsc --noEmit) to catch basic correctness issues
• A build check is included to ensure the project can successfully build
• No unit or integration tests are included yet, since this PR focuses on scaffolding rather than feature logic

Testing coverage will be expanded as functionality is added.

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📝 Code of Conduct & Contributing Guidelines

By creating this pull request, I agree to follow the Code of Conduct and Contributing Guidelines:

• I agree to follow the Code of Conduct and Contributing Guidelines.