autopilot mode + secondary chat input toolbar (#296691)

* autopilot mode + /yolo commands

* fix tests

* revert fix

* fix disposable leak

* address a few comments, make sure it works when switching sessions

* make some tests

* fix tests

* some reverts to cleaner state

* add secondary toolbar, permissions

* don't use query selector, surface toolbar in the template

* UI polish: context usage widget, secondary toolbar layout, theme tweaks

- Move context usage widget to secondary toolbar with percentage label on hover
- Adjust secondary toolbar padding/gap and input part bottom padding
- Lower icon-only threshold to 300px
- Darken input placeholder foreground in 2026 dark theme
- Update agent mode description

* update names

* update api for tool call limits

* add true autopilot

* move error retry logic to extension

* address some more comments

* make sure to hide tool

* bump version #

* better tool description

* fix conflict

* enterprise restrictions

* revert some stuff, fix sessions window containers

* fix actions

* fix delegate vs. session target

* fix compile + add setting

---------

Co-authored-by: David Dossett <[email protected]>