Merge claude/review-remaining-tasks-FORRM into copilot branch, accepting all incoming changes #3711

Originally written by @Copilot on GitHub.
Imported from https://github.com/ccantynz-alt/Hibiscus-to-airport/pull/36

Merges claude/review-remaining-tasks-FORRM into this branch with all conflicts resolved in favour of the incoming branch.

Conflict resolution

• backend/booking_routes.py — modify/delete conflict; accepted the deletion (incoming branch removes the retired FastAPI backend)

Changes landed from incoming branch

• Backend retirement — removes Dockerfile, render.yaml, and all backend/ Python source (FastAPI/Render stack fully retired)
• Frontend components — updates to About, Contact, Features, Fleet, GeoContent, Header, Hero, HowItWorks, Services, Testimonials
• New hook — frontend/src/hooks/useGoogleMaps.js
• Admin pages — AdminCreateBooking, AdminEditBooking updated
• Core pages — BookingPage, HomePage updated
• Deps — frontend/package.json + yarn.lock updated
• CLAUDE.md — updated to reflect current architecture