feat(todo): prepare for production deployment

- Fix type-check errors (subtask id, duplicate currentLocale)
- Add complete Astro landing page with Hero, Features, Pricing, CTA
- Add production environment templates (.env.example, .env.production.example)
- Add docker-compose.prod.yml for production deployment
- Add deploy.sh script for server deployment
- Add /health endpoint for web app health checks
- Improve docker-entrypoint.sh with database wait logic
- Remove references to deleted statistics and session-tasks stores

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/todo/.env.example

@@ -0,0 +1,25 @@
+# Todo Production Environment Variables
+# Copy this file to .env and fill in the values for docker-compose.prod.yml
+
+# =============================================================================
+# Backend Configuration
+# =============================================================================
+
+# PostgreSQL connection string
+DATABASE_URL=postgresql://todo_user:CHANGE_ME@postgres:5432/todo
+
+# Mana Core Auth URL for JWT validation
+MANA_CORE_AUTH_URL=https://auth.mana.how
+
+# Allowed CORS origins (comma-separated)
+CORS_ORIGINS=https://todo.mana.how
+
+# =============================================================================
+# Web Configuration
+# =============================================================================
+
+# Backend API URL (as seen from browser)
+PUBLIC_BACKEND_URL=https://todo-api.mana.how
+
+# Auth URL (as seen from browser)
+PUBLIC_MANA_CORE_AUTH_URL=https://auth.mana.how