part of DASH-388
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## PR-Codex overview
This PR focuses on updating the return types in the `convertFiatToCrypto` and `convertCryptoToFiat` functions to return objects instead of plain numbers. Additionally, it modifies the `SnapshotUpload` component to replace `Link` elements with `a` tags and adjusts the layout for better styling.
### Detailed summary
- Changed return type of `convertFiatToCrypto` to `{ result: 0.0000057 }`.
- Changed return type of `convertCryptoToFiat` to `{ result: 3404.11 }`.
- Replaced `Link` components with `a` tags in `SnapshotUpload`.
- Adjusted layout and styling in `SnapshotUpload` for improved design.
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