MIGRATION: Set up Keystatic CMS for content management

[jt14den]

Goal

Set up Keystatic CMS to enable Git-based content management and move away from Google Sheets round-tripping.

Context

See full migration plan: .github/MIGRATION_TO_KEYSTATIC.md

Current Problem: Lessons are stored in Google Sheets and fetched via CSV at build time. This creates issues with version control, code review, and collaborative editing.

Solution: Use Keystatic CMS with Astro content collections (singletons) for each lesson.

Tasks

• Install Keystatic dependencies

  npm install @keystatic/core @keystatic/astro

• Create keystatic.config.ts in project root
• Configure Keystatic for GitHub storage
• Set up authentication for Keystatic admin UI
• Add Keystatic route integration to astro.config.mjs
• Create /keystatic admin page
• Test local editing at http://localhost:4321/keystatic
• Document Keystatic setup in STUDENT_README.md

Acceptance Criteria

• Keystatic admin UI accessible at /keystatic route
• Can authenticate with GitHub
• Configuration file properly set up
• Documentation updated with Keystatic usage instructions

Reference Implementation

• UCLA IMLS Open Science project (uses same pattern)
• Keystatic Docs
• Keystatic + Astro Guide

Time Estimate

4-6 hours

Dependencies

None - this is the foundation for the other migration issues