fix(display): use kernel default console font instead of ter-v24n

The ter-v24n Terminus font renders garbled on CM5 DSI 720x1280
panel (green stretched line across screen). Switching to the
kernel's built-in Lat2-Terminus16 font for correct text rendering.

hosts/uConsole/configuration.nix

@@ -28,6 +28,10 @@ in
   # kernel managed by nixos-raspberrypi module — don't override, patches are version-specific
   # boot.kernelPackages = pkgs.linuxPackages_latest;
 
+  # Use kernel built-in console font — ter-v24n from nixos-uconsole is garbled on CM5
+  console.font = lib.mkForce "Lat2-Terminus16";
+  console.packages = lib.mkForce [ ];
+
   # Networking
   networking.networkmanager.enable = true;
   services.openssh = {