chore(nix): add version tracking and upgrade handling for amber-pm

1. 在包构建时写入版本文件到生成的状态目录
2. 在NixOS模块中添加版本检测逻辑，当版本变更时重新初始化状态
3. 新增首次初始化、版本升级和已有状态的不同处理流程

nix/module.nix

@@ -29,8 +29,29 @@ in
     boot.kernel.sysctl."kernel.apparmor_restrict_unprivileged_userns" = lib.mkDefault 0;
 
     system.activationScripts.amber-pm-state = lib.mkIf cfg.initializeState ''
-      if [ ! -e /var/lib/apm/apm ]; then
+      target="/var/lib/apm/apm"
+      version_file="$target/.amber-pm-version"
+      current_version="${cfg.package.version}"
+
+      if [ ! -e "$target" ]; then
+        echo "APM state directory not found, initializing..."
         ${cfg.package}/bin/amber-pm-init-state
+        echo "Running ace-init for first-time setup..."
+        /var/lib/apm/apm/files/bin/ace-init
+      elif [ -f "$version_file" ]; then
+        stored_version="$(cat "$version_file")"
+        if [ "$stored_version" != "$current_version" ]; then
+          echo "APM version changed ($stored_version -> $current_version), re-initializing..."
+          ${cfg.package}/bin/amber-pm-init-state --force
+          echo "Running ace-init..."
+          /var/lib/apm/apm/files/bin/ace-init
+        else
+          echo "APM version unchanged ($current_version), skipping ace-init."
+        fi
+      else
+        echo "No version file found, refreshing state and running ace-init..."
+        ${cfg.package}/bin/amber-pm-init-state --force
+        /var/lib/apm/apm/files/bin/ace-init
       fi
     '';
   };