Fixes#2052.
Navigation (`.nav-btn`) and channel icon (`.ch-icon-btn`) buttons now
use the shared 48px house minimum. Remove competing 44px
component/coarse-pointer rules and the legacy 32px mobile rule, and
correct comments that confused the house preference with accessibility
requirements.
At 768px, user-added channel rows already clipped Remove; the larger
Share target exposed the same constraint. Allow only those rows'
controls to wrap so both actions remain within the sidebar. Navigation
height and normal network-channel rows are unchanged.
- Red `7787d9b`: rendered target assertions fail at 375/390/768/1280px.
Green `e6ed9c8` changes CSS only.
- Validation: all 183 standalone suites; 33 computed touch-target
checks; 15 actual-page layout/click checks. Broader browser suite: 131
passed, 3 fixture-dependent skips. Three independent reviews found no
required changes.
- Browser verified: local Chromium and fixture-backed Go server;
screenshots `coverage/2052-targets-375.png` and
`coverage/2052-targets-768.png`.
- E2E assertion added: `tests/e2e/test-channel-fluid-e2e.js:112`,
covering dimensions, containment, overflow and normal Filter/Share
clicks. Existing CI selection is retained; Chromium-required runs cannot
silently skip the touch suite.
- Test-only follow-up `5144503` waits for packet readiness before
measuring navbar controls. Five fresh mobile contexts passed; size and
click assertions remain intact.
- No new settings, requests, dependencies or runtime JavaScript.
## Preflight overrides
- External `run-all.sh` unavailable; repository checks run directly.
- Local unit runner uses UTF-8 and `GITHUB_REF_NAME=local-validation`
for the existing release harness. Browser navigation uses a 60s local
budget for slow assets; repository assertions/timeouts are unchanged.
n30nex
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