New MeshDevicePanel.vue, added as a 4th/5th tab entry to activeTab/toolsTab/
mobileTab following the exact existing pattern (chat/bitcoin/deadman/
assistant/map). Shows firmware version, node ID, advert name, LoRa region,
channel, and device type -- firmware_version/self_node_id were already
server-side but never rendered; region is new (composed into MeshStatus from
MeshConfig.lora_region at read time, not part of the live session state).
Reboot button wired to the already-working mesh.reboot-radio RPC.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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