Add sorting to detail breakdown tables

lib/detail-sort.test.ts

@@ -0,0 +1,23 @@
+import { describe, expect, test } from "bun:test";
+import { sortDetailBreakdown } from "./detail-sort";
+
+describe("sortDetailBreakdown", () => {
+  const rows = [
+    { name: "beta", calls: 2, total_tokens: 100, quota: 500 },
+    { name: "alpha", calls: 5, total_tokens: 100, quota: 300 },
+    { name: "gamma", calls: 1, total_tokens: 300, quota: 100 },
+  ];
+
+  test("sorts by the selected numeric field without mutating the source rows", () => {
+    const sorted = sortDetailBreakdown(rows, "quota", false);
+
+    expect(sorted.map((row) => row.name)).toEqual(["beta", "alpha", "gamma"]);
+    expect(rows.map((row) => row.name)).toEqual(["beta", "alpha", "gamma"]);
+  });
+
+  test("uses name as a stable tie-breaker", () => {
+    const sorted = sortDetailBreakdown(rows, "total_tokens", false);
+
+    expect(sorted.map((row) => row.name)).toEqual(["gamma", "alpha", "beta"]);
+  });
+});