feat: 将延迟卡片改为秒显示

Author: GcsSloop

frontend/src/features/stats/StatsPage.test.tsx

@@ -102,6 +102,11 @@ describe("StatsPage", () => {
     expect(screen.getByText("P95 延迟")).toBeInTheDocument();
     expect(screen.getByText("P99 延迟")).toBeInTheDocument();
     expect(screen.getByText("最大 / 最小延迟")).toBeInTheDocument();
+    expect(screen.getByText("0.3 s")).toBeInTheDocument();
+    expect(screen.getByText("0.9 s")).toBeInTheDocument();
+    expect(screen.getByText("1.2 s")).toBeInTheDocument();
+    expect(screen.getByText("1.5 s / 0.1 s")).toBeInTheDocument();
+    expect(screen.getByText("321 ms")).toBeInTheDocument();
     expect(screen.queryByText("余额变化")).not.toBeInTheDocument();
     expect(screen.getByText("US$1.23")).toBeInTheDocument();
     expect(screen.queryByText("总 Token")).not.toBeInTheDocument();

frontend/src/features/stats/StatsPage.tsx

@@ -51,7 +51,7 @@ function formatCurrency(language: AppLanguage, value: number): string {
 }
 
 function formatLatency(language: AppLanguage, value: number): string {
-  return `${new Intl.NumberFormat(language, { maximumFractionDigits: 0 }).format(value)} ms`;
+  return `${new Intl.NumberFormat(language, { minimumFractionDigits: 1, maximumFractionDigits: 1 }).format(value / 1000)} s`;
 }
 
 function eventStatusColor(status: string): string {