fix: price fetching

[impelcrypto]

Pull Request Summary

• fix: return 0 if the app failed fetching USD price

Check list

• [ ] contains breaking changes
• [ ] adds new feature
• [x] modifies existing feature (bug fix or improvements)
• [ ] relies on other tasks
• [ ] documentation changes
• [ ] tested on mobile devices

This pull request makes the following changes:

Fixes

=Before=

=After=

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 4817d9d):

https://astar-apps--pr1243-fix-fetch-usd-price-4q1eatn5.web.app

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