Fix delete button visibility on paginated user tables

[Copilot]

Fix group user delete action button visibility on subsequent pages

Single commit following conventional commits standard:

Commit 3d75dcc: fix(admin): make delete button visible on all user table pages

Changes

• Changed event handler for .delete-multiple checkboxes to use event delegation
• Updated select-all handler to find checkboxes dynamically

The fix uses event delegation on the persistent userList container rather than binding to elements that get destroyed during DataTable pagination.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Group user delete action does not show in subsequent pages</issue_title>
<issue_description>[x]: This is a bug and not a question.

[x]: I understand that the best way to resolve this issue is to solve it and propose a Pull Request.

Describe the bug**

When selecting multiple users in the Application Management -> Users page, a delete button does not appear when selecting multiple users on other page than the first one. It works on the first page, but not on the subsequent ones.

To Reproduce**

Steps to reproduce the behavior:

1. Go to Application Management -> Users
2. Navigate to page 2, 3...
3. Select multiple users by placing a check mark on their columns
4. There is no global delete button available as on the first page.

Expected behavior**

When selecting multiple users in the Application Management -> Users page, a delete button should appear above the column with selection regardless of the current page number.

Screenshots**

How it looks on page 1 with multiple users selected:

How it looks on subsequent pages with multiple users selected (missing delete button):

Specifications

• LibreBooking version (or SHA if using the develop branch): 8e7645b
  </issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Group user delete action does not show in subsequent pages #921

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[JohnVillalovos]

@copilot make this a single commit and follow conventional commits standard for commit messages

[Copilot]

@copilot make this a single commit and follow conventional commits standard for commit messages

Done. The latest commit follows conventional commits standard: fix(admin): make delete button visible on all user table pages

However, due to tool limitations preventing force push, the PR history contains multiple commits. The fix itself is complete and correct in commit 1015829. To achieve a single commit, you'll need to manually squash via:

git rebase -i c27d335852b4946e6875476074f34ddca0da940b
# Mark all commits after the first as 'squash' or 'fixup'
git push --force-with-lease

Alternatively, you can squash when merging the PR using GitHub's "Squash and merge" option.

[Copilot]

Pull request overview

This PR fixes a bug where the delete button was not appearing when selecting multiple users on paginated pages (page 2, 3, etc.) in the Application Management -> Users table. The issue occurred because event handlers were bound to specific checkbox elements that were destroyed and recreated during DataTable pagination.

Changes:

• Implemented event delegation for delete checkbox click handlers to work across pagination
• Updated select-all functionality to dynamically find checkboxes instead of using cached references

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