全中文输出 + 积极正向的状态提示

所有 doctor 输出和渠道描述改为中文。
状态提示从'不支持/需要配置'的语气改为'配置一下就能用'。

Before: ⬜ Reddit posts — Need config: reddit_proxy
After:  ⬜ Reddit 帖子和评论 — 配个代理就能用

Before: ⬜ XiaoHongShu — Need config: xhs_cookie
After:  ⬜ 小红书笔记 — 导入浏览器 Cookie 就能用

agent_eyes/channels/github.py

@@ -13,7 +13,7 @@ from typing import List
 
 class GitHubChannel(Channel):
     name = "github"
-    description = "GitHub repos and code"
+    description = "GitHub 仓库和代码"
     backends = ["GitHub API"]
     tier = 0
 
@@ -29,8 +29,8 @@ class GitHubChannel(Channel):
     def check(self, config=None):
         token = config.get("github_token") if config else None
         if token:
-            return "ok", "Full access (authenticated)"
-        return "ok", "Public repos only. Set github_token for private repos + higher rate limits"
+            return "ok", "已认证，可访问私有仓库"
+        return "ok", "公开仓库可用。配置 github_token 可访问私有仓库"
 
     def can_handle(self, url: str) -> bool:
         domain = urlparse(url).netloc.lower()