* feat: add unified dropdown with services content in header
* feat: add right Git sidebar with resizable panel
* feat: implement responsive panel auto-toggle and terminal rehydration
- Auto-close the right sidebar when width is below a threshold and auto-open it when space permits
- Auto-close the bottom terminal when height is below a threshold and auto-open it when enough space
- Apply a dedicated rehydrated streaming configuration for terminal sessions to optimize reconnect behavior
* feat: enhance PR view with status caching and annotations
* feat(ui): enable chat dispatch in PullRequestSection
* feat(TerminalView): adjust layout
* feat: refine chat input layout and text selection menu
* fix(ui): show empty state in GitView when no changes
* feat(git): update PR actions styling and create PR button