update command: csst env show

app/csst.py

@@ -68,26 +68,10 @@ def show(name):
         return
 
     # 使用 glob 获取所有可用的环境文件
-    env_files = glob.glob("./envs/*.env")
-    available_configs = [os.path.splitext(os.path.basename(f))[0] for f in env_files]
-
-    # 检查请求的配置是否存在
-    if name not in available_configs:
-        click.echo(
-            f"Error: Predefined env file '{name}' does not exist.",
-            err=True,
-        )
-        click.echo("Available env files:")
-        for config in available_configs:
-            click.echo(f"  - {config}")
-        return
-
-    # 构建完整的文件路径
-    env_file_path = os.path.join("./envs", f"{name}.env")
-
+    env_file = os.path.join(APP_DIR, f"envs/{name}.env")
     # 读取并打印文件内容
     try:
-        with open(env_file_path, "r") as file:
+        with open(env_file, "r") as file:
             content = file.read()
             click.echo(content)
     except IOError as e: