[AlexAndBear]

Description

• Pagination: usePagination clamps the page to the last existing one, so a page beyond the end (e.g. after deleting or restoring the items of the last page, or ?page=9) shows the last page instead of an empty list without pagination.
• Trash bin: the empty state and the "Empty trash bin" button are based on all items instead of the current page.
• Admin settings spaces list: removed its own route-based "jump to last page" watcher, which the clamp now covers.
• Admin settings groups list: removed the page reset from the group delete action. It counted all groups instead of the filtered ones; the clamp now shows the last page of the filtered list.

Related Issue

• Fixes A page beyond the last one shows an empty list without pagination; in the trash bin "Empty trash bin" is disabled #3662
• Fixes Deleting all groups on the last page of a filtered list leaves an empty page without pagination #3680 (replaces fix: move to the last page after deleting all groups of a filtered last page #3700)

How Has This Been Tested?

• test environment: unit tests (Vitest)
• test case 1: usePagination with a page greater than the total returns the last page and its items
• test case 2: removing the only space of the last page in the admin settings spaces list shows the previous page's spaces
• test case 3: filtered groups list with 1 group per page on page 2: removing the group there shows the group of page 1

Types of changes

• Bugfix
• Enhancement (a change that doesn't break existing code or deployments)
• Breaking change (a modification that affects current functionality)
• Technical debt (addressing code that needs refactoring or improvements)
• Tests (adding or improving tests)
• Documentation (updates or additions to documentation)
• Maintenance (like dependency updates or tooling adjustments)