Multi-select agent questions; fullscreen file preview

New features

• Multi-select questions - Questions the agent asks you can now accept more than one answer, so you can pick several options at once
• Fullscreen file preview - The file preview panel can now be expanded to fullscreen and back with a toggle (app)

Improvements

• MCP tool details - Tool calls from MCP servers now show their details in the transcript instead of hiding them (app)
• Queued attachment previews - Attachments on a queued message now show a preview before the message is sent (app)

Bug fixes

• Git connection errors - Errors while connecting a Git provider are now shown in the app instead of failing without explanation (app)
• Pinned session dragging - Dragging a pinned session no longer unpins it when another target handles the drop (app)
• Show in folder on WSL - Revealing a file in its folder now works for paths inside WSL (app)