assistant: Polish /workflow and steps UI (#15936)

Fixes #15923
Release Notes:

- Assistant workflow steps can now be applied and reverted directly from
within the assistant panel.

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Co-authored-by: Antonio Scandurra <[email protected]>
Co-authored-by: Antonio <[email protected]>

v0.148.x preview

v0.147.x stable

collab: Update how mode is displayed in root endpoint (#15911)

This PR adjusts how we display the "mode" collab is running in on the
root endpoint.

It's minor, but it does make things a bit cleaner.

Release Notes:

- N/A

collab: Update how mode is displayed in root endpoint (#15911)

This PR adjusts how we display the "mode" collab is running in on the
root endpoint.

It's minor, but it does make things a bit cleaner.

Release Notes:

- N/A

zed 0.147.2

zed 0.146.5

Bump to 0.147.1 for @SomeoneToIgnore

Bump to 0.146.4 for @SomeoneToIgnore

v0.147.x preview