Received messages snapshot peer_name at receive time, so a Meshtastic
text that arrived before its sender's NodeInfo was stuck showing the
synthetic "Meshtastic !xxxx" id forever, and channel/group bubbles
showed no sender at all. Add a per-bubble sender label for received
messages in multi-sender views (mesh + Archipelago channels), resolved
LIVE from the peer table so it always shows the current archy identity
(e.g. "Arch Optiplex") the moment NodeInfo is learned. Falls back to
"Unknown sender" rather than echoing a Channel/synthetic placeholder.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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