MeshMonitor v4.16.0-rc4

Pre-release. A release candidate for 4.16.0. Not tagged latest, and no :latest Docker tags. Please report anything odd.

This RC is mostly repair work, and three of the fixes were quietly destroying or wasting things rather than merely looking wrong. The telemetry retention purge read two per-source settings with their un-namespaced keys, found nothing on every 4.x install, and fell through to the ordinary seven-day cutoff — so it had been deleting favourited nodes' history hourly, which is precisely the history that setting exists to protect. Reset Traceroutes tripped a source-scope guard and showed an error, but only after its unguarded sibling had already wiped every source's traceroutes; the same defect meant a global node purge wiped them silently, with no error at all. And a single dropped MQTT connection could start a reconnect loop that outlived the original fault, rebuilding sockets against a third-party broker indefinitely — measured at 216 rebuilds in ten minutes where there should have been one.

The rest is the mobile-landscape family. Five separately reported bugs shared one cause: mobile CSS gated on max-width alone silently switches off when a phone rotates, because a landscape phone is wider than the 768px breakpoint. That single mistake was hiding the Sources drawer's close control, collapsing the bottom nav to a 48px stub with two tabs unreachable, leaving the map frozen at the wrong size until reload, stranding the map sidebar as a cramped floating panel, and giving the Device config form a 94px strip to render in. Also fixed: the Network Survey panel had never requested its own endpoint correctly, Remote Admin's Save Security Config button could never enable, and channel/room names were near-invisible in High Contrast Dark.

Bug Fixes

Telemetry retention purge read favourites from the wrong settings namespace (#5082)
Scope traceroute purges, and guard the sibling that never did (#5089)
Stop the upstream MQTT broker connection storm (#5081)
Request the network survey under /api so it reaches the API router (#5086)
Stamp the security load gate from the per-section load too (#5091)
Offset content by the header's real height, not a constant (#5075)
Give the Device config form the screen in landscape (#5073)
Re-flow the map on landscape rotation and back (#5057)
Give MapSidebar a real landscape treatment (#5067)
Unbury the Sources drawer close control and the header chrome (#5058)
Stop a long source name from running into the connection dot (#5074)
Scope the non-scrollable-page rule to the channels tab (#5084)
Use theme text color for channel/room row buttons (#5072)

Features

MeshCore observer device stats from the /status topic, Phase 5 (#5076)
MeshCore shared read surfaces see an MQTT ingest source, Phase 5.5 (#5083)
Persist MeshCore observer noise floor as telemetry (#5090)

Documentation

Document the MeshCore MQTT ingest source (#5085)

Issues Resolved

#5051 Animated connection badge overflows/clips Sources button
#5052 Map zoom control renders above Sources sidebar
#5053 Mobile landscape: cannot close Sources menu
#5054 Map and bottom nav break on landscape rotation
#5069 Device config category picker eats most of the usable space
#5070 Info page heading clipped behind fixed top bar
#5071 Channel/room name text colour accessibility
#5077 Save Security Config never enables after loading
#5078 Network Survey fails with "Could not build the survey"
#5079 MQTT connection storm floods logs
#5080 Telemetry Dashboard shows only ~7 days for favourited nodes
#5088 Reset Traceroutes throws from the per-source Danger Zone

Upgrade Notes

Two fixes stop ongoing data loss but cannot undo it. Telemetry history already purged by the favourites bug (#5080), and traceroute history already wiped by either path in #5088, are unrecoverable. After upgrading, retention is honoured going forward — a 90-day window will refill over 90 days — but nothing restores what was deleted.

No action required otherwise. No schema changes, no configuration changes, and the protobufs/ submodule is unchanged since rc3.

Full Changelog: v4.16.0-rc3...v4.16.0-rc4