Improved UI toasting of API errors

[khandrew-redhat]

Type of change

• Refactor
• New feature
• Bug fix
• Optimization
• Documentation Update

Description

Toast messages now do the following:

• Account for different json structures when extracting message
• Do not allow the pages to hand when error occurs
• Fade in and out, lasting no longer than five seconds when displayed
• Displays Axios error message instead of basic HTTP response

Related Tickets & Documents

• Related Issue # PANDA-992
• Closes #

Checklist before requesting a review

• I have performed a self-review of my code.
• If it is a core feature, I have added thorough tests.

Testing

Tests are located within axiosInstance.test.js

[dbutenhof]

One real ESlint bug ... generally, this looks pretty cool, although I think a few bits could be cleaned up.

Did you hand-code all this (especially the neat CSS), or did you leverage an AI assistant? If you used AI, we're supposed to be tagging files with an "<assisted|created> by <cursor|claude|gemini|etc>" comment at the head of the file.

[khandrew-redhat]

Removed error-handling e2e test since the webpage it was for is removed as well.