2.4.0 — Bootstrap 5 migration & UI overhaul

Highlights

Bootstrap 4 → Bootstrap 5 migration (whole web interface)

• Switched to Bootstrap 5 CSS and converted every BS4 component: popovers, modals, badges (text-bg-*), button groups (btn-check), btn-block → w-100, and directional utilities (me-/ms-/pe-/ps-, text-start/end, float-start/end).

DataTables upgrade

• Replaced the incompatible 3.0 beta + Buttons 1.5.6 with DataTables 2.2.2 and Buttons 3.2.2.
• Added an ext.features.register polyfill and graceful JSON error handling in ajax2db.php so grids degrade cleanly on DB errors.
• Fixed duplicate header rows and restored navy header contrast.

UI modernisation

• Dark navy navbar, card headers, high-contrast tables.
• Redesigned login / logout / password-recovery splash pages with a large background logo.
• Mobile responsiveness across listings, dashboards and the company panel.
• Compact navbar, right-aligned language switcher, inline navbar login form.

Fixes

• Exit code indicator uses dark, high-contrast semantic colours and correctly classifies exit code 0 as success.
• Cookie consent banner rebuilt on Bootstrap 5 form-switch; saving verified end to end.
• Migrated FaIcon → BsIcon (Bootstrap Icons); jQuery loaded once.
• First-administrator setup button hidden once any user exists.

Packaging

• multiflexi-web5 now Conflicts/Replaces/Provides multiflexi-web, so only one web interface can be installed at a time.

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