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/twitter.py

@@ -16,7 +16,7 @@ import requests
 
 class TwitterChannel(Channel):
     name = "twitter"
-    description = "Twitter/X posts"
+    description = "Twitter/X 推文"
     backends = ["birdx", "Jina Reader"]
     tier = 0  # Single tweet reading is zero-config
 
@@ -27,8 +27,8 @@ class TwitterChannel(Channel):
     def check(self, config=None):
         # Basic reading always works (Jina fallback)
         if shutil.which("birdx"):
-            return "ok", "Full access (search + timeline + threads)"
-        return "ok", "Read-only (single tweets via Jina). Install birdx for search + timelines"
+            return "ok", "搜索、时间线、发推全部可用"
+        return "ok", "可读取推文。安装 birdx + 配置 Cookie 可解锁搜索和发推"
         return "ok", "Jina Reader (single tweets only)"
 
     async def read(self, url: str, config=None) -> ReadResult: