docs: update Vietnamese input setup instructions in README

Add fcitx5-configtool addon and clarify that Unikey must be added via
fcitx5-configtool's Input Method tab, not through KDE Virtual Keyboard settings.

hosts/nixos/configuration.nix

@@ -4,9 +4,11 @@
   imports = [ ./hardware-configuration.nix ];
 
   # Bootloader
-  boot.loader.grub.enable = true;
-  boot.loader.grub.device = "/dev/sda";
-  boot.loader.grub.useOSProber = true;
+#  boot.loader.grub.enable = true;
+#  boot.loader.grub.device = "/dev/sda";
+#  boot.loader.grub.useOSProber = true;
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
 
   # Enable flakes and nix-command
   nix.settings.experimental-features = [ "nix-command" "flakes" ];
@@ -24,6 +26,7 @@
     fcitx5.addons = with pkgs; [
       qt6Packages.fcitx5-unikey
       fcitx5-gtk
+      fcitx5-configtool
     ];
   };
 

hosts/nixos/hardware-configuration.nix

@@ -5,22 +5,29 @@
 
 {
   imports =
-    [ (modulesPath + "/profiles/qemu-guest.nix")
+    [ (modulesPath + "/installer/scan/not-detected.nix")
     ];
 
-  boot.initrd.availableKernelModules = [ "ata_piix" "uhci_hcd" "virtio_pci" "virtio_scsi" "sd_mod" "sr_mod" ];
+  boot.initrd.availableKernelModules = [ "nvme" "ehci_pci" "xhci_pci" "usb_storage" "sd_mod" "sdhci_pci" ];
   boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-amd" ];
   boot.extraModulePackages = [ ];
 
   fileSystems."/" =
-    { device = "/dev/disk/by-uuid/51da3f97-16fa-4ed5-a12f-a4466b66359f";
+    { device = "/dev/disk/by-uuid/2a2c3132-502e-41cd-98c1-f18ee4b5bce2";
       fsType = "ext4";
     };
 
+  fileSystems."/boot" =
+    { device = "/dev/disk/by-uuid/74FC-4814";
+      fsType = "vfat";
+      options = [ "fmask=0077" "dmask=0077" ];
+    };
+
   swapDevices =
-    [ { device = "/dev/disk/by-uuid/7a05616d-d8d8-4fa5-9810-49118204c9f2"; }
+    [ { device = "/dev/disk/by-uuid/18d7c34a-b3ad-4f98-82e7-a64072d9ff20"; }
     ];
 
   nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
 }