Finding and clearing out duplicate files used to mean opening a separate window on top of your file list. Now it's a full mode of its own, switched to with one click, so reviewing duplicates feels like a normal part of working the list rather than a detour.

• Added a toolbar switch between the regular file list and a dedicated Duplicates view, sharing the same project sidebar so you never lose your place moving between the two.
• The Duplicates screen keeps everything it already did – re-scan, exclusion patterns, keep-pattern rules – now with more room to work and no popup window to manage.
• If you've made changes in Duplicates mode and haven't saved them, switching projects or modes now warns you first, so a half-finished cleanup can never be silently lost.
• Under the hood, this is also the foundation for upcoming duplicate-handling rules – the mode switch had to exist before rules could be built on top of it.