Trail Mate: offline Meshtastic and MeshCore handheld for the LilyGO T-Deck and T-Lora Pager

Trail Mate, by vicliu624, is firmware for keyboard LoRa handhelds that works without the internet or a phone. You pick one chat network at a time: Meshtastic, MeshCore or Reticulum/LXMF (the firmware doesn't bridge between them). Offline maps come as TMAP packages that you prepare for a region in Trail Mate Center and copy to the SD card, with OSM, terrain or satellite views plus the routing graph and place search for that area. On devices with PSRAM you can plan a walking route on the device itself (Tracker → Menu → Nav → New), save it and follow it in Map with turn hints, remaining distance and replanning, all offline. It also records tracks, follows KML routes, has a GNSS sky plot, plays MP3s from a /Music folder on the SD card and has a widget screen. The device is your account: plug it into a computer over USB and the browser tools use it to sign the trails or Geocaches you publish, with no website login. The author's two main test devices are the LilyGO T-Lora Pager (SX1262), the default and most complete target, and the LilyGO T-Deck. Other boards in the repo are less mature: the Pager LR1121 version, Seeed Wio Tracker L2 Pro, two simplified nRF52 targets (GAT562 Mesh EVB Pro and T-Echo-Lite, messaging only), and bring-up ports for the T-Deck Pro, T-Watch S3, M5Stack Tab5 and T-Display P4. Install it from the browser installer or from the board-specific Releases files (v1.0.1 fixes USB browser management on the Pager and T-Deck), or build it with PlatformIO, ESP-IDF or CMake. Set the radio region for your country before transmitting, and read the project's responsible-use section first. Licensed AGPL-3.0.