Adds a complete browser-based interface for managing stations,
closing the last deliverable of rev04 Phase 1.
- New /admin/stations page with stations table, create/edit modal,
delete confirmation and dedicated recipe-assignment modal
- Proxy endpoints under /admin/api/stations/* covering CRUD and
recipe assign/unassign so all admin operations stay behind the
Flask CSRF + admin_required guard
- Navbar entry "Stazioni" (desktop + mobile), visible to admins only
- 10 new tests covering page render, every proxy and the non-admin
redirect
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
