fix: add timestamped tool context to logs

src/logging/console-capture.test.ts

@@ -8,6 +8,7 @@ import {
   enableConsoleCapture,
   resetLogger,
   routeLogsToStderr,
+  setConsoleTimestampPrefix,
   setLoggerOverride,
 } from "../logging.js";
 import { loggingState } from "./state.js";
@@ -34,6 +35,7 @@ beforeEach(() => {
   };
   loggingState.consolePatched = false;
   loggingState.forceConsoleToStderr = false;
+  loggingState.consoleTimestampPrefix = false;
   loggingState.rawConsole = null;
   resetLogger();
 });
@@ -47,6 +49,7 @@ afterEach(() => {
   console.trace = snapshot.trace;
   loggingState.consolePatched = false;
   loggingState.forceConsoleToStderr = false;
+  loggingState.consoleTimestampPrefix = false;
   loggingState.rawConsole = null;
   resetLogger();
   setLoggerOverride(null);
@@ -72,6 +75,43 @@ describe("enableConsoleCapture", () => {
     enableConsoleCapture();
     expect(() => console.log("hello")).not.toThrow();
   });
+
+  it("prefixes console output with timestamps when enabled", () => {
+    setLoggerOverride({ level: "info", file: tempLogPath() });
+    const now = new Date("2026-01-17T18:01:02.000Z");
+    vi.useFakeTimers();
+    vi.setSystemTime(now);
+    const warn = vi.fn();
+    console.warn = warn;
+    setConsoleTimestampPrefix(true);
+    enableConsoleCapture();
+    console.warn("[EventQueue] Slow listener detected");
+    expect(warn).toHaveBeenCalledTimes(1);
+    const firstArg = String(warn.mock.calls[0]?.[0] ?? "");
+    expect(firstArg.startsWith("2026-01-17T18:01:02.000Z [EventQueue]")).toBe(true);
+    vi.useRealTimers();
+  });
+
+  it("does not double-prefix timestamps", () => {
+    setLoggerOverride({ level: "info", file: tempLogPath() });
+    const warn = vi.fn();
+    console.warn = warn;
+    setConsoleTimestampPrefix(true);
+    enableConsoleCapture();
+    console.warn("12:34:56 [exec] hello");
+    expect(warn).toHaveBeenCalledWith("12:34:56 [exec] hello");
+  });
+
+  it("leaves JSON output unchanged when timestamp prefix is enabled", () => {
+    setLoggerOverride({ level: "info", file: tempLogPath() });
+    const log = vi.fn();
+    console.log = log;
+    setConsoleTimestampPrefix(true);
+    enableConsoleCapture();
+    const payload = JSON.stringify({ ok: true });
+    console.log(payload);
+    expect(log).toHaveBeenCalledWith(payload);
+  });
 });
 
 function tempLogPath() {