CN-1078: Fix: Removing double decoding of goToURL in LL

[adammino-ledger]

✅ Checklist

• npx changeset was attached.
• Covered by automatic tests.
• Impact of the changes:
  • the goToURL passed to LL to be opened in an iFrame or webview is now decoded just once.

📝 Description

This PR fixes a bug where the goToURL parameter passed by the buy-sell-ui to Ledger Live was decoded twice causing issues on URLs that contain a signature with special characters (e.g. AlchemyPay).

For reference, on LLD, URLSearchParams from LiveAppExchange extracts and passes the searchParams using searchParams.entries which by default decodes the URL value, and then down the hierarchy of components getInitialURL uses decodeURIComponent to decode again the goToURL value.

The bug was not visible till we had a use case where a URL from a live app was containing special characters (+) because decoding twice a URL without special chars would return the same URL with no complications. With the + though the URL would break when opened in an iFrame/Webview or browser as the + would need to be encoded in order to work( what happened with AlchemyPay ).

In order to fix this i kept the default decoding from searchParams.entries in LLD that let you extract and decode in a clean way the URLs, remove the extra decoding from getIinitialURL but add a decode on LLM when the url gets passed through customParams in the PTX screen as that does not uses searchParams utility so there is no decoding by default.

❓ Context

• JIRA or GitHub link: CN-1078

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🧐 Checklist for the PR Reviewers

• The code aligns with the requirements described in the linked JIRA or GitHub issue.
• The PR description clearly documents the changes made and explains any technical trade-offs or design decisions.
• There are no undocumented trade-offs, technical debt, or maintainability issues.
• The PR has been tested thoroughly, and any potential edge cases have been considered and handled.
• Any new dependencies have been justified and documented.
• Performance considerations have been taken into account. (changes have been profiled or benchmarked if necessary)

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