v1.17.16

## Core
### Bugfixes
- Exposed reasoning effort variants for Grok models.
- Improved xAI prompt cache routing and PDF file support in Responses models.

## Desktop
### Improvements
- Added an Open containing folder action for projects on the home screen.
- Added a composer add menu for files, commands, context, and shell mode without losing draft text.
- Added a provider setup tip on new sessions when no external providers are connected.
- Remember review panel mode and selected file per session.
- Added inline file browser tabs for opening and previewing files from the side panel.
- Updated desktop translations.

### Bugfixes
- Kept the review pane usable on wide screens by reserving its minimum width.
- Fixed hidden session panes staying mounted and causing side-panel glitches.
- Routed legacy drafts back to the session page.
- Loaded full review diffs for large patches when the initial diff is capped.
- Removed the first-open flash in the command palette.
- Routed the new session shortcut through tabs in the new layout.
- Kept session routes inside the correct layout when opening legacy session URLs.