feat(docker): add container logs modal and stats columns (#4807)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

packages/request-handler/src/docker-log-decode.spec.ts

@@ -0,0 +1,53 @@
+import { describe, expect, test } from "vitest";
+
+import { createDockerLogStreamProcessor, decodeDockerLogs } from "./docker-log-decode";
+
+const encodeDockerLogFrame = (streamType: number, message: string) => {
+  const payload = Buffer.from(message, "utf-8");
+  const header = Buffer.alloc(8);
+  header.writeUInt8(streamType, 0);
+  header.writeUInt32BE(payload.length, 4);
+  return Buffer.concat([header, payload]);
+};
+
+describe("decodeDockerLogs", () => {
+  test("decodes multiplexed docker log frames", () => {
+    const logs = Buffer.concat([encodeDockerLogFrame(1, "hello "), encodeDockerLogFrame(2, "world")]);
+
+    expect(decodeDockerLogs(logs)).toBe("hello world");
+  });
+
+  test("returns plain text logs unchanged", () => {
+    expect(decodeDockerLogs("plain text log")).toBe("plain text log");
+  });
+
+  test("falls back to raw buffer text for non-multiplexed output", () => {
+    expect(decodeDockerLogs(Buffer.from("raw docker output", "utf-8"))).toBe("raw docker output");
+  });
+});
+
+describe("createDockerLogStreamProcessor", () => {
+  test("emits decoded chunks from a stream", () => {
+    const messages: string[] = [];
+    const processChunk = createDockerLogStreamProcessor(
+      (data) => messages.push(data),
+      () => undefined,
+      1024,
+    );
+
+    const chunk = encodeDockerLogFrame(1, "streamed log");
+    expect(processChunk(chunk)).toBe(true);
+    expect(messages).toEqual(["streamed log"]);
+  });
+
+  test("returns false when message size exceeds limit", () => {
+    const processChunk = createDockerLogStreamProcessor(
+      () => undefined,
+      () => undefined,
+      4,
+    );
+
+    const chunk = encodeDockerLogFrame(1, "this message is too long");
+    expect(processChunk(chunk)).toBe(false);
+  });
+});