fix: replace hardcoded 192.168.1.122 with node122 (hostname resolves via /etc/hosts to LAN or EasyTier)

- mo_config.py: xiaoguo_host=node122, xiaoguo_api_url property
- market_screener.py, xiaoguo_scanner.py, xiaoguo_news_processor.py: use mo_config or node122 fallback
- scripts/intraday_health_check.py, scripts/ocr_client.py: node122
- EasyTier connects at 10.144.144.2 when off-LAN

market_screener.py

@@ -9,13 +9,19 @@ WEB_DASHBOARD_DIR = Path(__file__).resolve().parent.parent.parent / "web-dashboa
 DATA_DIR = WEB_DASHBOARD_DIR / "data"
 MARKET_JSON = DATA_DIR / "market.json"
 POOL_JSON = DATA_DIR / "candidate_pool.json"
-XIAOGUO_API = "http://192.168.1.122:18003/v1/chat/completions"
 XIAOGUO_MODEL = "Qwen3.6-27B-OptiQ-4bit"
 API_TIMEOUT = 60
 MAX_SECTORS = 5
 MAX_CANDIDATES_POOL = 60
 TENCENT_URL = "http://qt.gtimg.cn/q="
 
+def _get_xiaoguo_url():
+    try:
+        from mo_config import get_config
+        return get_config().xiaoguo_api_url
+    except Exception:
+        return "http://node122:18003/v1/chat/completions"  # legacy fallback
+
 
 def load_json(path):
     try: