Show output tokens in detail stats

lib/detail-stats.test.ts

@@ -0,0 +1,32 @@
+import { describe, expect, test } from "bun:test";
+import { getDetailStats } from "./detail-stats";
+
+describe("getDetailStats", () => {
+  test("includes completion tokens in detail page stat cards", () => {
+    const stats = getDetailStats({
+      calls: 12,
+      total_tokens: 1000,
+      quota: 250000,
+      prompt_tokens: 400,
+      completion_tokens: 350,
+      cache_creation_tokens: 150,
+      cache_read_tokens: 100,
+    });
+
+    expect(stats.map((stat) => stat.key)).toEqual([
+      "calls",
+      "total_tokens",
+      "quota",
+      "prompt_tokens",
+      "completion_tokens",
+      "cache_creation_tokens",
+      "cache_read_tokens",
+    ]);
+    expect(stats.find((stat) => stat.key === "completion_tokens")).toEqual({
+      key: "completion_tokens",
+      labelKey: "th.output",
+      value: 350,
+      format: "tokens",
+    });
+  });
+});