feat(uconsole): add flashable SD image package (SSH+WiFi+keys)

flake.nix

@@ -139,5 +139,28 @@
           };
         };
         devShells.${system}.default = devShell;
+        packages.${system} = {
+          # Image SD flashable pour uConsole CM5 (SSH + WiFi + clés)
+          # Usage : dd if=result of=/dev/sda bs=4M status=progress conv=fsync
+          uconsole-cm5-image = nixos-uconsole.lib.mkUConsoleImage {
+            variant = "cm5";
+            modules = [
+              {
+                nixpkgs.buildPlatform = system;
+                nixpkgs.hostPlatform = "aarch64-linux";
+                nixpkgs.config.allowUnfree = true;
+              }
+              nixos-raspberrypi.nixosModules.nixpkgs-rpi
+              nixos-raspberrypi.nixosModules.raspberry-pi-5.base
+              nixos-raspberrypi.lib.inject-overlays-global
+              # kernel uConsole + notre config minimal
+              nixos-uconsole.nixosModules.kernel
+              (nixos-uconsole.nixosModules.cm { lib = nixpkgs-uconsole.lib; isCM4 = false; })
+              nixos-uconsole.nixosModules.base
+              agenix.nixosModules.default
+              ./hosts/uconsole-cm5/configuration.nix
+            ];
+          }.config.system.build.sdImage;
+        };
       };
 }