Checkpoint: v4.0 media service, compose deploy, and verified docs

client/src/lib/media.test.ts

@@ -0,0 +1,17 @@
+import { describe, expect, it } from "vitest";
+import { formatRecordingTime, pickBitrate } from "./media";
+
+describe("media utilities", () => {
+  it("formats recording time with minute and second padding", () => {
+    expect(formatRecordingTime(0)).toBe("00:00");
+    expect(formatRecordingTime(61_000)).toBe("01:01");
+    expect(formatRecordingTime(12 * 60_000 + 9_000)).toBe("12:09");
+  });
+
+  it("selects bitrates by preset and device class", () => {
+    expect(pickBitrate("economy", true)).toBe(1_000_000);
+    expect(pickBitrate("clarity", false)).toBe(2_500_000);
+    expect(pickBitrate("balanced", true)).toBe(1_400_000);
+    expect(pickBitrate("balanced", false)).toBe(1_900_000);
+  });
+});