fix(xiaoyuzhou): correct groq-api-key→groq-key in doctor hint and fix check() reading config after configure (#129)

Fixes #128

Two bugs:
1. doctor warn message said 'agent-reach configure groq-api-key' but the
   actual CLI arg is 'groq-key' (see cli.py:75 choices list and :993 handler).
   Same typo existed in cli.py _install_xiaoyuzhou_deps() output.

2. check() had a logic flaw: the inner 'if not has_key' was nested inside
   'if not os.environ.get(...)', so when GROQ_API_KEY env var was absent but
   config.json read succeeded, the outer condition never triggered the warning.
   Refactored to a flat has_key variable — cleaner and correct.

Verified: 36/36 tests pass, manual unit tests confirm warn uses 'groq-key'
and ok is returned when groq_api_key is present in config.json.

Co-authored-by: 小白(Agent) <neo@agent-reach.dev>

agent_reach/channels/xiaoyuzhou.py

@@ -35,11 +35,10 @@ class XiaoyuzhouChannel(Channel):
                 "  或手动复制 transcribe.sh 到 ~/.agent-reach/tools/xiaoyuzhou/"
             )
 
-        # Check GROQ_API_KEY
+        # Check GROQ_API_KEY — prefer env var, fall back to config file
-        if not os.environ.get("GROQ_API_KEY"):
+        has_key = bool(os.environ.get("GROQ_API_KEY"))
-            # Check if saved in config
+        if not has_key:
             config_path = os.path.expanduser("~/.agent-reach/config.json")
-            has_key = False
             if os.path.isfile(config_path):
                 try:
                     import json
@@ -52,7 +51,7 @@ class XiaoyuzhouChannel(Channel):
             return "warn", (
                 "需要配置 Groq API Key（免费）。步骤：\n"
                 "  1. 注册 https://console.groq.com\n"
-                    "  2. 运行: agent-reach configure groq-api-key gsk_xxxxx"
+                "  2. 运行: agent-reach configure groq-key gsk_xxxxx"
             )
 
         return "ok", "完整可用（播客下载 + Whisper 转录）"

agent_reach/cli.py

@@ -503,7 +503,7 @@ def _install_xiaoyuzhou_deps():
         print("  ✅ Groq API key configured")
     else:
         print("  -- Groq API key not set. Get free key at https://console.groq.com")
-        print("     Then run: agent-reach configure groq-api-key gsk_xxxxx")
+        print("     Then run: agent-reach configure groq-key gsk_xxxxx")
 
 
 def _install_weibo_deps():