The coverage page opened at a hardcoded [51.0, 4.8] zoom 8 regardless of deployment, ignoring /api/config/map (#2032). It now follows the same precedence as the main map (URL hash, then saved position, then /api/config/map, then [37.6, -122.1] zoom 9) and persists its own position across visits, syncing lat/lon/zoom into the hash so a view is shareable.
The saved position lives under its own key, rx-coverage-view, and the page never reads or writes the main map's map-view: sharing the configured default was the bug, sharing the session position was not. Both suites assert map-view stays untouched after a pan, so reintroducing a shared write fails instead of passing quietly.
Also fixed here: selectedRx is now percent-encoded into the hash, and a generation counter stops a late /api/config/map response or a stale 150ms layout timer from building a map for a page that was already left.
Reviewed twice. Verified by mutation rather than by reading: writing map-view too, ignoring the saved coverage position, and dropping the /api/config/map fetch each make the unit suite exit 1, so it covers the feature, the fix and the rejected alternative. The deploy.yml invocation was confirmed to land inside Run Playwright E2E tests (fail-fast) by parsing the workflow, and CI run 35261689694 is the E2E suite's first real execution: Go prints 'RX coverage viewport regressions OK' and Playwright prints 'RX coverage viewport browser regressions OK'.
Worth recording for the next reviewer: that E2E asserted localStorage.getItem('map-view'), so wiring it into deploy.yml without updating the assertion would have turned the job red on its first ever run. It was registered in scripts/non-unit-tests.json but invoked by nothing, the gap tracked as #2037.
Merged by the interim maintainer without a second human reviewer: CI and the mutation checks above are the independent checks.
Fixes#2032
liquidraver
bbf54cfe1b