feat: add uConsole CM5 host configuration

- Uses nixos-uconsole.nixosModules.uconsole-cm5 with nixos-raspberrypi
- Module chain: raspberry-pi-5.base + uconsole-cm5
- Includes HAM radio, SDR, GPS, and security tools
- Packages adjusted for latest nixpkgs (reticulum/marble not available)

flake.nix

@@ -12,10 +12,20 @@
       url = "git+https://git.lix.systems/lix-project/lix?ref=main";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    # uConsole CM5 hardware support
+    nixos-uconsole = {
+      url = "github:nixos-uconsole/nixos-uconsole";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    # nixos-raspberrypi provides hardware.raspberry-pi options required by uconsole-cm5
+    nixos-raspberrypi = {
+      url = "github:nvmd/nixos-raspberrypi/v1.20260317.0";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
     self.submodules = true;
   };
 
-  outputs = { self, nixpkgs, agenix, lix, ... }@inputs:
+  outputs = { self, nixpkgs, agenix, lix, nixos-uconsole, nixos-raspberrypi, ... }@inputs:
     let
       system = "x86_64-linux";
       keys = import ./lib/keys.nix;
@@ -79,6 +89,25 @@
               ./hosts/cyt-pi/hardware-configuration.nix
             ];
           };
+
+          uConsole = nixpkgs.lib.nixosSystem {
+            system = "aarch64-linux";
+            specialArgs = { inherit self keys paths inputs nixos-raspberrypi; };
+            modules = [
+              {
+                nixpkgs.config.allowUnfree = true;
+                nixpkgs.hostPlatform = "aarch64-linux";
+                nixpkgs.overlays = [ nixos-raspberrypi.overlays.vendor-pkgs ];
+                nix.package = lix.packages."aarch64-linux".default;
+              }
+              # Raspberry Pi 5 base (provides hardware.raspberry-pi options)
+              nixos-raspberrypi.nixosModules.raspberry-pi-5.base
+              # uConsole CM5 hardware support (display, kernel, config)
+              nixos-uconsole.nixosModules.uconsole-cm5
+              ./hosts/uconsole/configuration.nix
+              ./hosts/uconsole/hardware-configuration.nix
+            ];
+          };
         };
         devShells.${system}.default = devShell;
       };