MrRSS

### Added

- Expand or collapse the feed list with a configurable keyboard shortcut (`B` by default), including a shortcut hint on the sidebar button. (#1235)
- Dismiss an unpinned feed list when clicking or focusing outside it, or when the application loses focus. (#1236)
- Extract video enclosures and inline video sources, show generic videos in the multimedia gallery, and play them with native video controls while retaining YouTube and Bilibili embeds. (#1244)
- Allow dragging rendered article images to desktop/file-manager targets using the WebView's image/file download drag support, with safe filenames and the existing media proxy. Availability depends on the platform WebView.

### Fixed

- Avoid reinstalling frontend dependencies during backend development rebuilds, preventing Windows file-lock errors while Vite is running.
- Keep observing background refreshes and detect article saves between progress polls, updating the selected feed/category, articles, and unread counts without losing the current article. (#1229)
- Refresh the interface when either Miniflux or FreshRSS finishes synchronization, repair the polling-state reference, and check sync HTTP responses. (#1242) (@He