Bugfix | WTM-354 | Handle error when AI Search is not available

[jmartel07]

Issue: #354

📑 Changes:

• Webpage code update to display a toast when the error happens
• Extension code update to display a toast when the error happens

✅ Checks

• [x] My pull request adheres to the code style of this project
• [ ] My code requires changes to the documentation
• [ ] I have updated the documentation as required
• [x] All the tests have passed

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Name	Status	Preview	Comments	Updated (UTC)
webtm-webpage	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 30, 2024 1:02pm
wtm-back	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 30, 2024 1:02pm