Vault UX Improvements & Bug Fixes

Improvements

• We've fixed vault context menu styling using proper design system tokens, along with separator logic and the View action now only appearing for previewable files #e5df59d
• We've improved folder metadata display in list and grid views—folders now show file and subfolder counts instead of blank values #e5df59d
• We've added a unified folder preview panel with single-click to preview and double-click to navigate, matching the file preview experience #c4277e5
• We've fixed the move modal self-selection bug—folders can no longer be moved into themselves or their own subfolders #c4277e5
• We've made the release notification toast truly undismissable—it can no longer be swiped away or closed except by refreshing #b4420ed
• We've fixed What's New modal content for silent patches—it now shows the most recent visible release instead of empty content #4290ccf