[Bug]: env type is wrong from StorybookConfig in @storybook/your-framework

[valentinpalkovic]

Describe the bug

The env property doesn't accept a function definition like this:

import { StorybookConfig } from "@storybook/angular";

const config: StorybookConfig = {
  stories: [...],
  framework: {
    name: "@storybook/angular"
    options: {},
  },
  env: (config) => ({
    ...config,
    FLAGS: JSON.stringify({
      flag1: true,
    }),
  }),
};

export default config;

Error:

The bug was introduced in 8.0.0-alpha.0 by #21555 here: https://github.com/storybookjs/storybook/pull/21555/files#diff-6ed749534ddc1242cc6f43a60dd370d916334533a03f2e0c36edb653e24eb74dR1

To Reproduce

No response

System

System:
    OS: Linux 5.15 Ubuntu 22.04.3 LTS 22.04.3 LTS (Jammy Jellyfish)
    CPU: (16) x64 AMD Ryzen 7 7800X3D 8-Core Processor
    Shell: 5.8.1 - /usr/bin/zsh
  Binaries:
    Node: 18.18.2 - ~/.nvm/versions/node/v18.18.2/bin/node
    Yarn: 1.22.21 - /mnt/c/Program Files/nodejs/yarn
    npm: 9.8.1 - ~/.nvm/versions/node/v18.18.2/bin/npm <----- active
    pnpm: 8.14.2 - /mnt/c/Program Files/nodejs/pnpm
  npmPackages:
    @storybook/addon-a11y: ^8.0.0-alpha.14 => 8.0.0-alpha.14 
    @storybook/addon-actions: ^8.0.0-alpha.14 => 8.0.0-alpha.14 
    @storybook/addon-designs: 7.0.7 => 7.0.7 
    @storybook/addon-essentials: ^8.0.0-alpha.14 => 8.0.0-alpha.14 
    @storybook/addon-interactions: ^8.0.0-alpha.14 => 8.0.0-alpha.14 
    @storybook/addon-links: ^8.0.0-alpha.14 => 8.0.0-alpha.14 
    @storybook/angular: ^8.0.0-alpha.14 => 8.0.0-alpha.14 
    @storybook/jest: 0.2.3 => 0.2.3 
    @storybook/testing-library: 0.2.2 => 0.2.2 
    chromatic: 10.0.0 => 10.0.0 
    eslint-plugin-storybook: 0.6.15 => 0.6.15 
    storybook: ^8.0.0-alpha.14 => 8.0.0-alpha.14

Additional context

No response

[shilman]

FWIW I don't think a TS error should ever be S2 unless it is a ubiquitous that most Storybooks will run into. The user always has the workaround of // @ts-ignore to get around it. Which sucks but is much better than our other S2 issues.

I've re-labeled this as S3 and moved it to the RC milestone.