Closes#19984
As part of this, I refactored the error template to take in a slice of
actions rather than using individual booleans and strings to control the
behavior.
We decided a link resolves the issue for now so that is what I added,
although we may want to consider a way to start the workspace and follow
the logs dynamically on that page and then show the app when finished
(similar to the tasks page), or at least make the link automatically
start the workspace instead of only taking you to the dashboard where
you have to then start the workspace.
### Description
This pull-request ensures that we're using the right colors (and
themeing things within the actual coder brand) on the `error.html` page.
Furthermore, I went ahead and cleaned up the CSS Variables and converted
all `px` units to a standard `rem` unit (16px base).
### Preview
<img width="3516" height="2388" alt="CleanShot 2025-12-02 at 11 09
55@2x"
src="https://github.com/user-attachments/assets/781623ea-a487-4a2e-a08e-bec86d6de6f5"
/>
Asher