test(runner): teach the web fakes to take the step's logs

Claude-Session: https://claude.ai/code/session_01ShuAy8q8ZfPi8KHxwc8JpQ

internal/runner/web_last_action_test.go

@@ -26,7 +26,8 @@ globalThis.properties = {};
 // control, so the runner has a real applied action to report on the next step.
 type tappingWebDriver struct {
 	*mockdriver.Driver
-	installed []string
+	installed     []string
+	installedLogs []string
 }
 
 func (d *tappingWebDriver) InstallBundle(context.Context, []byte) error { return nil }
@@ -44,6 +45,11 @@ func (d *tappingWebDriver) SetLastAction(_ context.Context, encoded json.RawMess
 	return nil
 }
 
+func (d *tappingWebDriver) SetLogs(_ context.Context, encoded json.RawMessage) error {
+	d.installedLogs = append(d.installedLogs, string(encoded))
+	return nil
+}
+
 func TestRunner_WebInstallsLastActionInThePage(t *testing.T) {
 	state := newHarnessWithSpec(t, lastActionSpec)
 	web := &tappingWebDriver{Driver: state.mock}