fix: use nixos-uconsole module with its own nixpkgs

- nixos-uconsole manages its own nixpkgs input
- Uses nixos-uconsole.lib.nixosSystem for proper module support
- Restores uconsole.* options in configuration.nix
- Includes nixos-hardware.raspberry-pi-5 module

hosts/uconsole/configuration.nix

@@ -2,8 +2,20 @@
 
 {
   # --- CORE HARDWARE (CM5 / RPi5) ---
-  # Manual hardware config in flake.nix (nixos-uconsole module has compatibility issues)
-  # Display and firmware configured in flake.nix modules array
+  # nixos-uconsole.nixosModules.uconsole-cm5 imported in flake.nix
+
+  uconsole = {
+    enable = true;
+    variant = "cm5"; # Hardware target: CM5/RPi5
+    # Fixes the landscape orientation at boot
+    videoMode = "720x1280M@60D,panel_orientation=right_side_up";
+  };
+
+  # Firmware for Wi-Fi and Bluetooth
+  hardware.enableRedistributableFirmware = true;
+  
+  # Enable GPU acceleration (VideoCore VII)
+  hardware.graphics.enable = true;
 
   # --- BASIC HOST INFO ---
   networking.hostName = "uConsole";