docs: clarify Python module responsibilities

Rewrite the module-level descriptions for all 28 Python files and remove the obsolete integration note from grok_register_ttk.py. Verified on Python 3.9 and Python 3.12.

cpa_xai/__init__.py

@@ -1,3 +1,5 @@
+"""导出 CPA xAI OIDC 凭证生成流程的公共接口。"""
+
 from .mint import mint_and_export
 
 __all__ = ["mint_and_export"]

cpa_xai/browser_confirm.py

@@ -1,9 +1,4 @@
-"""Approve xAI device-code in Chromium (DrissionPage).
-
-Paths resolve relative to the project root.
-Token polling is the source of truth; browser automation is only used to
-log in and approve the device authorization page.
-"""
+"""自动完成 xAI 登录、设备授权确认和相关页面交互。"""
 
 from __future__ import annotations
 

cpa_xai/browser_session.py

@@ -1,4 +1,4 @@
-"""CPA Chromium session lifecycle, reuse, cleanup, and cookies."""
+"""管理 CPA 授权浏览器会话、代理、Cookie 注入和资源清理。"""
 from __future__ import annotations
 
 import os

cpa_xai/mint.py

@@ -1,4 +1,4 @@
-"""High-level OIDC mint + export pipeline."""
+"""协调浏览器授权、OAuth 轮询和 CPA 凭证导出流程。"""
 
 from .browser_confirm import mint_with_browser
 from .schema import DEFAULT_BASE_URL, build_cpa_xai_auth

cpa_xai/oauth_device.py

@@ -1,4 +1,4 @@
-"""xAI OAuth device-code flow for Build/CLI credentials."""
+"""实现 OAuth Device Authorization 的发现、启动和 token 轮询。"""
 
 import json
 import time

cpa_xai/proxyutil.py

@@ -1,11 +1,4 @@
-"""Proxy helpers for CPA/OIDC export.
-
-The OAuth HTTP calls can use ``http://user:pass@host:port`` directly, but
-Chromium cannot reliably use proxy credentials embedded in --proxy-server.
-When an authenticated HTTP/HTTPS proxy is configured we start a tiny localhost
-bridge that injects Proxy-Authorization for Chromium, matching the main
-registration browser behavior.
-"""
+"""解析认证代理并为 CPA 浏览器提供本地代理桥。"""
 
 import base64
 import os

cpa_xai/schema.py

@@ -1,4 +1,4 @@
-"""Build CLIProxyAPI-compatible xAI OAuth auth payloads."""
+"""定义并规范化 CPA xAI 凭证文件的数据结构。"""
 
 import base64
 import json

cpa_xai/writer.py

@@ -1,4 +1,4 @@
-"""Atomic write of xAI auth files."""
+"""将 CPA xAI 凭证安全写入本地 JSON 文件。"""
 
 import json
 import os