feat: send rich info to Plain support and track submit event for amplitude

[AGMASO]

General Changes

• Added logic to automatically send the user's wallet address when submitting an inquiry, if analytics opt-in is enabled. Otherwise, a checkbox is displayed allowing the user to choose whether to share their wallet address for better support.

• Added a new Amplitude track event triggered when the user submits the form.

Developer Notes

• Check it out the PLAIN_API_KEY still there and correct in prod
• Do we need anything else in the trackEvent params?

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Reviewer Checklist

Please ensure you, as the reviewer(s), have gone through this checklist to ensure that the code changes are ready to ship safely and to help mitigate any downstream issues that may occur.

• End-to-end tests are passing without any errors
• Code changes do not significantly increase the application bundle size
• If there are new 3rd-party packages, they do not introduce potential security threats
• If there are new environment variables being added, they have been added to the .env.example file as well as the pertinant .github/actions/* files
• There are no CI changes, or they have been approved by the DevOps and Engineering team(s)

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Project	Deployment	Preview	Comments	Updated (UTC)
interface	Ready	Preview	Comment	Dec 8, 2025 8:34am

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