Hide addon panel for all stories by deafult

[hhourani27]

Summary

I am trying to hide the addon panel by default for all stories.
I tried this solution and added options: { showPanel: true } to preview.ts

import type { Preview } from "@storybook/react";

const preview: Preview = {
  parameters: {
    actions: { argTypesRegex: "^on[A-Z].*" },
    controls: {
      matchers: {
        color: /(background|color)$/i,
        date: /Date$/i,
      },
    },
    options: { showPanel: true },
  },
};

export default preview;

But when I added options, Storybook didn't start correctly and displayed a blank page at start.

I also tried to follow this previous discussion and the Features and behavior documentation, but my version of storybook (7.6.8) doesn't have a .storybook/manager.ts file

So I created .storybook/manager.ts with

import { addons } from "@storybook/manager-api";

addons.setConfig({
  showPanel: false,
});

But it didn't work, as I still see the addon panel when Storybook starts.

Is there something I missed? Thank you for your time!

Additional information

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[paveleremin]

Any updates on this?