### Added

- Added bulk selection for the Conversations page, including batch copy, batch delete, and `Esc` to leave selection mode.
- Added iFly Search and Tavily Search settings, including engine template defaults and direct configuration fields in Settings.

### Changed

- Changed the Home composer shortcut so `Enter` sends and `Shift + Enter` inserts a newline.
- Changed the chat workspace to show richer agent activity, including better tool output rendering, subagent status persistence, and improved file preview interactions.

### Fixed

- Fixed conversation list bottom spacing and overflow so the last rows no longer get cramped against the window edge.
- Fixed session action menus in conversation surfaces so they stay visible and clickable near the viewport edge.
