feat: 新增 laptop 主机配置（Ultra 9 285H / Arc）

- hosts/laptop/hardware.nix: 本机真实硬件配置（btrfs 子卷 / NPU / 微码）
- hosts/laptop/default.nix: 复用 common/desktop-plasma/chinese/gaming/printing/apps，跳过 nvidia 与 fpga；加 Intel Arc VA-API
- flake.nix: 抽出 mkSystem，新增 nixosConfigurations.laptop / nixos

.gitignore

@@ -15,3 +15,4 @@ secrets.nix
 *.key
 .env
 .env.*
+gcm-diagnose.log

README.md

@@ -14,9 +14,12 @@ modules/
   nvidia.nix              # RTX 4060（12700F 无核显）
   gaming.nix              # Steam
   printing.nix            # CUPS + HP ULD + 中文打印
-  apps.nix                # QQ/微信包装、开发工具等
+  apps.nix                # QQ/微信包装、开发工具、KiCad、SPlayer、opencode 等
   fpga.nix                # 高云 FPGA（Gowin EDU IDE + 开源工具链）
-pkgs/hp-uld-driver.nix
+pkgs/
+  hp-uld-driver.nix
+  gowin-eda-edu-ide/      # 高云教育版 IDE（FHS）
+  opencode-bin.nix        # 官方 opencode 二进制（规避 nixpkgs 崩溃）
 ```
 
 ## 目标机安装（摘要）

flake.nix

@@ -1,5 +1,5 @@
 {
-  description = "whc NixOS — desktop (i7-12700F + RTX 4060)";
+  description = "whc NixOS — desktop (i7-12700F + RTX 4060) + laptop (Ultra 9 285H / Arc)";
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
@@ -9,11 +9,17 @@
     { self, nixpkgs, ... }:
     let
       system = "x86_64-linux";
+      mkSystem = host: nixpkgs.lib.nixosSystem {
+        inherit system;
+        modules = [ (./hosts + "/${host}") ];
+      };
     in
     {
-      nixosConfigurations.desktop = nixpkgs.lib.nixosSystem {
-        inherit system;
-        modules = [ ./hosts/desktop ];
+      nixosConfigurations = {
+        desktop = mkSystem "desktop";
+        laptop = mkSystem "laptop";
+        # hostname 仍是 nixos：让不带 attr 的 `nixos-rebuild --flake .#` 也能命中
+        nixos = mkSystem "laptop";
       };
 
       # 无 flake 时也可：把本仓库拷到 /etc/nixos 后 nixos-rebuild switch

hosts/laptop/default.nix

@@ -0,0 +1,26 @@
+# 笔记本：Intel Core Ultra 9 285H + Intel Arc（Arrow Lake-P），无 NVIDIA
+{ pkgs, ... }:
+
+{
+  imports = [
+    ./hardware.nix
+    ../../modules/common.nix
+    ../../modules/desktop-plasma.nix
+    ../../modules/chinese.nix
+    ../../modules/gaming.nix
+    ../../modules/printing.nix
+    ../../modules/apps.nix
+    # 本机无 NVIDIA：刻意不导入 ../../modules/nvidia.nix
+    # FPGA 工具链依赖 Qt5，在 unstable 上求值风险高，暂不导入 ../../modules/fpga.nix
+  ];
+
+  networking.hostName = "nixos";
+
+  # 笔记本不照抄 desktop 的 "performance"，交给内核默认调度
+  # powerManagement.cpuFreqGovernor = "powersave";
+
+  # Intel Arc 硬解（VA-API），可选
+  hardware.graphics.extraPackages = [ pkgs.intel-media-driver ];
+
+  system.stateVersion = "26.05";
+}

hosts/laptop/hardware.nix

@@ -0,0 +1,46 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/installer/scan/not-detected.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "xhci_pci" "thunderbolt" "nvme" "uas" "sd_mod" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-intel" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/cbcb5930-50a9-4ff8-92f9-4622bd869579";
+      fsType = "btrfs";
+    };
+
+  fileSystems."/home" =
+    { device = "/dev/disk/by-uuid/cbcb5930-50a9-4ff8-92f9-4622bd869579";
+      fsType = "btrfs";
+      options = [ "subvol=home" ];
+    };
+
+  fileSystems."/nix" =
+    { device = "/dev/disk/by-uuid/cbcb5930-50a9-4ff8-92f9-4622bd869579";
+      fsType = "btrfs";
+      options = [ "subvol=nix" ];
+    };
+
+  fileSystems."/boot" =
+    { device = "/dev/disk/by-uuid/84D8-EB50";
+      fsType = "vfat";
+      options = [ "fmask=0077" "dmask=0077" ];
+    };
+
+  swapDevices =
+    [ { device = "/dev/disk/by-uuid/d62e342b-271a-40e7-912d-3a748b5f55a1"; }
+    ];
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.intel.npu.enable = true;
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}

modules/apps.nix

@@ -142,7 +142,14 @@ in
     fzf
     btop
 
-    opencode
+    # EDA / 媒体
+    kicad
+    splayer-next
+    (writeShellScriptBin "splayer" ''exec ${splayer-next}/bin/SPlayer-Next "$@"'')
+
+    # 官方二进制：nixpkgs 版发 prompt 会崩（SystemPrompt.environment）
+    (callPackage ../pkgs/opencode-bin.nix { })
+    bun # opencode 插件安装需要
     cursor-cli
   ];
 }

pkgs/opencode-bin.nix

@@ -0,0 +1,50 @@
+# 官方预编译二进制：nixpkgs 用新版 bun 构建的 opencode 会在发 prompt 时
+# 触发 SystemPrompt.environment 崩溃（Unexpected server error / a.name）。
+{
+  lib,
+  stdenv,
+  fetchurl,
+  autoPatchelfHook,
+  makeWrapper,
+  ripgrep,
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "opencode";
+  version = "1.18.31";
+
+  src = fetchurl {
+    url = "https://github.com/anomalyco/opencode/releases/download/v${finalAttrs.version}/opencode-linux-x64.tar.gz";
+    hash = "sha256-6TEr517YA7dBX8Kuq9ofT+k4kSo5Zzdi3Aw4wOEeveQ=";
+  };
+
+  nativeBuildInputs = [
+    autoPatchelfHook
+    makeWrapper
+  ];
+
+  buildInputs = [ stdenv.cc.cc.lib ];
+
+  sourceRoot = ".";
+
+  dontStrip = true;
+
+  installPhase = ''
+    runHook preInstall
+    install -Dm755 opencode $out/bin/.opencode-wrapped
+    makeWrapper $out/bin/.opencode-wrapped $out/bin/opencode \
+      --prefix PATH : ${lib.makeBinPath [ ripgrep ]} \
+      --set OPENCODE_DISABLE_AUTOUPDATE true
+    runHook postInstall
+  '';
+
+  meta = {
+    description = "AI coding agent built for the terminal (official binary; nixpkgs build is broken)";
+    homepage = "https://github.com/anomalyco/opencode";
+    changelog = "https://github.com/anomalyco/opencode/releases/tag/v${finalAttrs.version}";
+    license = lib.licenses.mit;
+    platforms = [ "x86_64-linux" ];
+    mainProgram = "opencode";
+    sourceProvenance = with lib.sourceTypes; [ binaryNativeCode ];
+  };
+})