Add iOS safe-area viewport support and inset-aware mobile header/spacer
sizing so controls clear the notch or Dynamic Island. Desktop and tablet
headers remain unchanged. Includes focused unit and mobile browser
regression coverage.
Replace the iOS AppIcon variants with the exact Android launcher artwork
from `public/favicons/web-app-manifest-512x512.png`, so the physical
iPhone home-screen icon matches Android. Verified all declared icon
dimensions and focused iOS icon test.
## What changed
- load customer product rules for the booking customer and keep
selection fail-closed while they resolve
- prevent restricted products, add-ons, pickup, and wash certificates
from remaining selected or being submitted
- improve product-grid containment, selected add-on styling, unavailable
messaging, and tablet/mobile rendering
- preserve booking details when the API rejects stale restricted items
- add unit and Playwright coverage for loading, retry, exact
restrictions, automatic products, layout, and stale backend recovery
## Why
The customer booking flow could use stale or unrelated POS customer-rule
state, expose restricted items, and lose useful form state after a
server rejection. The desktop product area also overflowed and switched
to an inconsistent compact layout after selection.
## Validation
- desktop booking Playwright suite: 12 passed
- mobile booking Playwright suite: 4 passed, 8 expected desktop-only
skips
- relevant unit tests: 35 passed
- ESLint and i18n checks
- production Vite build
## Related backend PR
The coordinated API PR enforces the same rule at the write boundary.
Align restricted desktop and mobile POS controls, scope the Danish primary registration label to POS, and preserve generic registration wording across shared surfaces and other locales.
## Purpose
After-activation canary for repository ruleset `19051697`.
## Evidence before activation
- preparation PR #172 established stable `Required CI`
- strict-current-base remediation PR #174 passed `Required CI` and
Qodana
- merged master run `29501928124` completed with 43 successful jobs and
one intentional skip
- effective master rules were audited after activation
## Canary acceptance
- merge is blocked while `Required CI` is pending
- the exact `Required CI` check comes from GitHub Actions integration
`15368`
- only squash merge is accepted
- the branch is deleted automatically after merge
Keep expanded period rows on InvoicingPeriodObjectTree while rendering order-scoped flags in a compact expanded flag list. Update the invoicing-period E2E fixtures and source contract for the object-tree path.