Set up Cursor Cloud dev environment for Paradise Planner

[ether314]

Summary

Sets up the development environment for the Paradise Planner (Vacation Agent) repo so cloud agents can lint, test, build, and run the apps. Documents non-obvious startup caveats in AGENTS.md under ## Cursor Cloud specific instructions.

The only code change is the AGENTS.md addition; the rest is environment setup (Flutter SDK install + dependency installs) captured via the startup update script.

Environment

• Installed Flutter 3.44.2 / Dart 3.12.2 (matches flutter_app/pubspec.lock) at /opt/flutter, symlinked into /usr/local/bin, web enabled.
• Update script refreshes deps on startup: flutter pub get (flutter_app/) and npm install (functions/, slack-orchestrator/).

Verification

• flutter pub get, flutter analyze (only 4 pre-existing info/warning lints), flutter test (12/12 pass)
• functions + slack-orchestrator npm install + npm run build succeed
• Backend connectivity: node scripts/test-chat-flow.mjs (Gemini reply OK) and node scripts/test-submit-lead.mjs (HTTP 200)
• Ran the customer web app (flutter run -d web-server -t lib/main_customer.dart) and completed a hello-world E2E: chatted with the AI concierge, provided trip details + phone, and reached the lead-submission handoff confirmation.

Note: the apps talk to the live Firebase project vacation-app-21706 (hardcoded config); no emulator wiring exists, so chat/lead flows need network access to Firebase. Twilio SMS is optional.