Fixes#1782.
## Problem
When `clientRxCoverage` is enabled, the **Coverage** route
(`#/rx-coverage`) is reachable from the desktop top-nav but
**unreachable on mobile** — neither the bottom-nav "More" sheet (phones,
≤768px) nor the edge-swipe drawer (touch tablets, >768px) lists it.
## Root cause
`public/roles.js` injects the Coverage link **only into the desktop
top-nav** (`.nav-links`), gated on `window.MC_CLIENT_RX_COVERAGE`. The
two mobile nav surfaces build their long-tail lists from **independent
hardcoded arrays** that omitted `rx-coverage`:
- `public/bottom-nav.js` → `MORE_ROUTES`
- `public/nav-drawer.js` → `ROUTES`
Both even carry `!! MANUAL SYNC REQUIRED !!` comments. Because the link
is injected into the DOM (not these arrays) and is config-gated, it
never reached mobile.
## Fix
Both surfaces now insert the Coverage entry **right after Analytics**
(matching the desktop top-nav insertion point) when
`window.MC_CLIENT_RX_COVERAGE` is true. The check is evaluated at **lazy
build time** (first sheet/drawer open), by which point `MeshConfigReady`
has resolved the flag. Default-off behaviour is unchanged, so the
default nav still matches the existing nav-overflow tests.
## Testing
Adds `test-rx-coverage-mobile-nav-e2e.js`, which:
- skips cleanly when Chromium is unavailable (`CHROMIUM_REQUIRE=1` makes
it a hard fail) or when `clientRxCoverage` is disabled — mirroring
`test-node-reach-coverage-e2e.js`;
- at 360px asserts Coverage is present in the bottom-nav More sheet,
ordered after Analytics, and that tapping it navigates to
`#/rx-coverage`;
- at 1024px asserts Coverage is present in the edge-swipe drawer,
ordered after Analytics.
Verified locally against a server built from this branch with
`clientRxCoverage` enabled (migrated `test-fixtures/e2e-fixture.db`):
- new test: **3/3 pass**; reverting the two source files makes it **fail
3/3** (true regression test);
- existing nav e2e suites still green: `test-nav-drawer-1064-e2e.js`
(11/11), `test-bottom-nav-1061-e2e.js` (31/31),
`test-nav-more-floor-1139-e2e.js` (10/10).
## Notes
- No perf impact: the route list is built once, lazily, on first
sheet/drawer open.
- The hardcoded `MORE_ROUTES` / `ROUTES` arrays remain the source of
truth for the always-on routes; this only conditionally appends the one
opt-in route, consistent with how `roles.js` already gates the desktop
link.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
