feat(client): i18n copy + reco lang refresh + home polish

client/app/_layout.tsx

@@ -34,7 +34,7 @@ SplashScreen.preventAutoHideAsync();
 
 export default function RootLayout() {
   const [loaded, error] = useFonts({
-    SpaceMono: require('../assets/fonts/SpaceMono-Regular.ttf'),
+    STIXTwoText: require('../assets/fonts/STIXTwoText-VariableFont_wght.ttf'),
     ...FontAwesome.font,
   });
   const [i18nReady, setI18nReady] = useState(false);
@@ -48,7 +48,7 @@ export default function RootLayout() {
     initI18n()
       .catch((e) => {
         // i18n 初始化失败不应阻塞 App 启动，先打印错误再继续
-        console.error('i18n 初始化失败', e);
+        console.error('i18n init failed', e);
       })
       .finally(() => setI18nReady(true));
   }, []);