chore: prepare release v8.31.0

[susnux]

v8.31.0 (2025-09-11)

📝 Notes

The NcSettingsInputText component was deprecated,
it is no longer used by Nextcloud or Nextcloud apps and not recommended to be used for design reasons.

🚀 Enhancements

• feat: add NcKbd component #7407
• feat(NcRadioGroup): add component to group radio buttons #7474

🐛 Fixed bugs

• fix(NcAssistantIcon): adjust gradient for dark theme #7430
• fix(NcPopover): regression with this.getPopoverTriggerContainerElement is not a function #7443 (max-nextcloud)
• fix(NcCheckboxRadioSwitch): ensure label less radio has proper size #7477
• fix(NcDateTime): adjust for bidi support #7485
• fix(NcReferenceWidget): harden checks for reference = null #7493
• fix(NcRadioGroup): fieldsets always need a label for accessibility #7495
• fix(NcAvatar): make min status size visually accessible #7480

Other Changes

• chore(NcCheckboxRadioSwitch): deprecate button variant in favor of NcRadioGroup #7492
• chore: deprecate NcSettingsInputText component #7488
• chore: migrate to ESLint 9 and @nextcloud/eslint-config 9 #7418 (ShGKme)
• chore(lint): fix #7425 (ShGKme)
• chore(test): explicitly import from jest/globals to simplify migration to/from Vitest #7424 (ShGKme)
• docs: typos in 8.30.0 changelog #7422

[susnux]

Maybe wait for:

• [stable8] chore(NcCheckboxRadioSwitch): deprecate button variant in favor of NcRadioGroup #7492
• [stable8] fix(NcAppNavigationItem): ensure to pass boolean where needed #7491