Implement internationalization support by adding translation functionality and updating UI components to use translated strings. Add language configuration in .env.example and integrate translations across various strategy and UI components.

src/utils/format.ts

@@ -1,8 +1,14 @@
+import { t } from "../i18n";
+
+export type TrendLabel = "做多" | "做空" | "无信号";
+
+export function formatTrendLabel(trend: TrendLabel): string {
+  if (trend === "做多") return t("trend.label.long");
+  if (trend === "做空") return t("trend.label.short");
+  return t("trend.label.none");
+}
+
 export function formatNumber(value: number | null | undefined, digits = 4, fallback = "-"): string {
   if (value == null || Number.isNaN(value)) return fallback;
   return Number(value).toFixed(digits);
 }
-
-export function formatTrendLabel(trend: "做多" | "做空" | "无信号"): string {
-  return trend;
-}