fix: Onboarding / assistant switcher improvements

[sestinj]

Description

A number of small improvements to the onboarding flow + assistant switcher

Checklist

• I've read the contributing guide
• The relevant docs, if any, have been updated or created
• The relevant tests, if any, have been updated or created

Tests

These are small, safe UI changes

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Summary by cubic

Improved the onboarding flow and assistant switcher by making UI updates and fixing confusing actions.

• UI Improvements
  • Show a message when no assistants are found.
  • Always display the user’s email in the switcher.
  • Update the reload button to refresh assistants instead of creating a new one.
  • Remove blocking prompts so users are not forced to create an assistant.

[netlify]

❌ Deploy Preview for continuedev failed. Why did it fail? →

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[cubic-dev-ai]

cubic found 1 issue across 3 files. Review it in cubic.dev

_{React with 👍 or 👎 to teach cubic. Tag @cubic-dev-ai to give specific feedback.}

[cubic-dev-ai]

Using the array index as the key in a list can cause rendering issues if the list order changes. It's better to use a unique identifier such as profile.id as the key.