Added: Sun/moon toggle in admin header — staff can switch between dark theme and default Perfex light mode
Added: Theme preference stored in browser localStorage (per device)
Added: Settings to allow/disable user switching and set default theme for new sessions
Fixed: Single ticket view — sticky title bar and subject text readable on dark background
Fixed: Task modal — comment highlights and comment text contrast on dark backgrounds
Fixed: TinyMCE editors — dark content area on ticket reply and all admin rich-text fields
Fixed: Ajax-search bootstrap-select (Contact, etc.) — dark dropdown and readable “Start typing to search” hint
Fixed: Bootstrap-select clear (×) icon visible on dark fields
Fixed: Ticket reply attachments alignment and padding
Improved: Removed bounce animation on select dropdown menus
Improved: Task comment dropzone styled for dark theme
