feat(ui): decouple interfaces from external interfaces

[KirylSAP]

Summary

Type leakage in the ui-components package caused by public component interfaces extending types from third-party libraries. These leaked types introduce unintended compile-time dependencies for consumers and break the abstraction boundary of the package.

Changes Made

• Refactored PopupMenu public interfaces:
(PopupMenuProps, PopupMenuToggleProps, PopupMenuItemProps, PopupMenuOptionsProps) to use only our own/React types instead of types from @headlessui/react, while keeping Headless UI as an internal implementation detail.
• Introduced dedicated DateTimePicker type module (types.ts) with DateOption, DateLimit, LocaleKey, CustomLocale, and DateChangeHandler (plus backward-compatible Juno* aliases), and wired DateTimePickerProps to use these types instead of flatpickr types.
• Added internal mappers.ts for DateTimePicker to convert our public types into flatpickr types, ensuring that flatpickr remains fully encapsulated and its types are not exposed from the package.
• Updated Tab, TabList, and TabPanel components to define their own TabProps, TabListProps, and TabPanelProps instead of extending react-tabs types, keeping react-tabs usage internal.
• Adjusted packages/ui-components/src/index.ts exports so consumers import only our public DateTimePicker and PopupMenu/Tab types, with no direct dependency on third-party type definitions.

Related Issues

• Epic
• PopupMenu
• DatePicker
• TabList

Testing Instructions

1. pnpm i
2. pnpm lint
3. pnpm test

Checklist

• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• I have made corresponding changes to the documentation (if applicable).
• My changes generate no new warnings or errors.
• I have created a changeset for my changes.

PR Manifesto

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Latest commit: 23d1d7d

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[github-actions]

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[TilmanHaupt]

Looks good to me.

[taymoor89]

Thanks for taking care. Good work.
I'd suggest to change public interfaces of the components as less as possible and for standard html attributes extend with React.HTMLElement<HTMLElement> so we don't have to individually specify them.