Replace obsolete reader-timeout and message-thread source assertions with
compiled regressions for bookmark saving across battery/USB transitions and
newest-visible message summaries in History, Pending, and Unread modes.
Extend the MQTT sleep harness with dual-radio state and verify both blockers
release when disabled. All 19 post-native verification groups pass on Linux,
including the complete UI and browser runtime suites.
Use measured text rows for companion and repeater layouts, retain the V4 6px footer, and add overlap and navigation regressions. Correct the MQTT logging sleep documentation contract test.