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

mo_config.py

@@ -87,7 +87,18 @@ class MoConfig:
     
     hk_rate_fallback: float = 0.87  # 港币→人民币 fallback 汇率
     
-    # ── 服务配置 ──────────────────────────────────────────────────
+    # ── 小果 LLM 端点（用机器名，/etc/hosts 自动解析 LAN/EasyTier）─
+    # node122 = 192.168.1.122 (LAN) / 10.144.144.2 (EasyTier)
+    xiaoguo_host: str = "node122"
+    xiaoguo_port: int = 18003
+    
+    @property
+    def xiaoguo_url(self) -> str:
+        return f"http://{self.xiaoguo_host}:{self.xiaoguo_port}"
+    
+    @property
+    def xiaoguo_api_url(self) -> str:
+        return f"{self.xiaoguo_url}/v1/chat/completions"
     
     port: int = field(default_factory=lambda: int(os.environ.get("PORT", "8899")))