🐛 `useReadonlyClassProperties` doesn't work with static members

[jakeleventhal]

Environment information

CLI:
  Version:                      2.3.2
  Color support:                true

Platform:
  CPU Architecture:             aarch64
  OS:                           macos

Environment:
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  BIOME_LOG_PREFIX_NAME:        unset
  BIOME_CONFIG_PATH:            unset
  BIOME_THREADS:                unset
  NO_COLOR:                     unset
  TERM:                         xterm-256color
  JS_RUNTIME_VERSION:           v22.20.0
  JS_RUNTIME_NAME:              node
  NODE_PACKAGE_MANAGER:         pnpm/10.11.1

Biome Configuration:
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  Path:                         biome.jsonc
  Formatter enabled:            true
  Linter enabled:               true
  Assist enabled:               true
  VCS enabled:                  true

Workspace:
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What happened?

https://biomejs.dev/playground/?lintRules=useReadonlyClassProperties&code=YwBsAGEAcwBzACAAUwBvAG0AZQBDAGwAYQBzAHMAIAB7AAoAIAAgAHAAcgBpAHYAYQB0AGUAIABzAHQAYQB0AGkAYwAgAFYAQQBMAFUARQAgAD0AIAAiAEEAUwBEAEYAIgA7AAoAfQAKAA%3D%3D

Expected result

Static values like this should be reported as being updatable to readonly

Code of Conduct

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[siketyan]

This is detected by noUnusedPrivateClassMembers: https://biomejs.dev/playground/?lintRules=noUnusedPrivateClassMembers&code=YwBsAGEAcwBzACAAUwBvAG0AZQBDAGwAYQBzAHMAIAB7AAoAIAAgAHAAcgBpAHYAYQB0AGUAIABzAHQAYQB0AGkAYwAgAFYAQQBMAFUARQAgAD0AIAAiAEEAUwBEAEYAIgA7AAoAfQAKAA%3D%3D

[jakeleventhal]

@siketyan i don't think thats true? my suggestion is that it should say

private static readonly rather than private static

[ematipico]

@jakeleventhal does the eslint rule detect this case?

[jakeleventhal]

Yes, but not for non-private functions it seems?