移除 --auth-context，改为 --auth-stdin，结构化传递解析认证信息

cli/tjwater_cli/main.py

@@ -27,14 +27,14 @@ from .helping import (
 def root_callback(
     ctx: typer.Context,
     server: Annotated[str | None, typer.Option("--server", help=f"服务端地址，默认 {DEFAULT_SERVER}")] = None,
-    auth_context: Annotated[Path | None, typer.Option("--auth-context", help="认证上下文 JSON 文件")] = None,
+    auth_stdin: Annotated[bool, typer.Option("--auth-stdin", help="从标准输入读取认证上下文 JSON")] = False,
     scheme: Annotated[str | None, typer.Option("--scheme", help="全局方案标识")] = None,
     timeout: Annotated[int, typer.Option("--timeout", help="请求超时秒数")] = DEFAULT_TIMEOUT,
     request_id: Annotated[str | None, typer.Option("--request-id", help="显式请求 ID")] = None,
 ) -> None:
     ctx.obj = {
         "server": server,
-        "auth_context": auth_context,
+        "auth_stdin": auth_stdin,
         "scheme": scheme,
         "timeout": timeout,
         "request_id": request_id,