简化stable/unstable切换的方式；增加兼容性代码，根据版本引用

modules/home/fcitx.nix

@@ -1,16 +1,21 @@
 # 输入法配置模块
 { config, lib, pkgs, ... }: {
 
-  i18n.inputMethod = {
+  i18n.inputMethod = (if lib.versionAtLeast config.home.stateVersion "25.05" then {
+    enable = true;
+    type = "fcitx5";
+  } else {
     enabled = "fcitx5";
+  }) // {
     fcitx5 = {
       addons = with pkgs; [
         fcitx5-gtk
         fcitx5-chinese-addons
         fcitx5-nord
       ];
-      waylandFrontend = true; # available in home-manager-25.05
-    };
+    } // (lib.optionalAttrs (lib.versionAtLeast config.home.stateVersion "25.05") {
+      waylandFrontend = true;
+    });
   };
 
   gtk = {

modules/home/vscode/default.nix

@@ -1,25 +1,28 @@
-{ config, pkgs, libs, ... }:
-
+{ config, pkgs, lib, libs, ... }:
+let
+  extensions = with pkgs.vscode-extensions; [
+    bierner.markdown-mermaid
+    esbenp.prettier-vscode
+    foxundermoon.shell-format
+    github.copilot
+    github.copilot-chat
+    golang.go
+    jnoortheen.nix-ide
+    pkief.material-icon-theme
+  ] ++ pkgs.vscode-utils.extensionsFromVscodeMarketplace [
+  ];
+in
 {
   imports = [
   ];
   programs = {
     vscode = {
       enable = true;
-      profiles.default = {
-        extensions = with pkgs.vscode-extensions; [
-          bierner.markdown-mermaid
-          esbenp.prettier-vscode
-          foxundermoon.shell-format
-          github.copilot
-          github.copilot-chat
-          golang.go
-          jnoortheen.nix-ide
-          pkief.material-icon-theme
-        ] ++ pkgs.vscode-utils.extensionsFromVscodeMarketplace [
-        ];
-      };
-    };
+    } // (if lib.versionAtLeast config.home.stateVersion "25.05" then {
+      profiles.default = { inherit extensions; };
+    } else {
+      inherit extensions;
+    });
   };
 
   xdg.configFile = {