Align coin activation state in fiat ramp page with portfolio view

[smk762]

Closes #3271

• Updates activation of selected coin in fiat ramp form to use the common coinsRepo, to ensure it appears subsequently in portfolio view, and is correctly marked as active in the activation menu.
• Restores BTC-segwit to the enabledByDefaultCoins list, as it is the default selection in the fiat ramp form

To test:

• Create and log in with a fresh wallet
• Confirm KMD and BTC-segwit enabled by default
• Go to fiat ramp page
• Select any coin not already activated, and wait for its addresses to load
• Return to the portfolio page
• Confirm coin selected in fiat form appears in the portfolio coins list
• Enter the Add Assets menu
• Confirm coin selected in fiat form toggle is in the correct position to indicate it is active

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch align-activation=state

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[github-actions]

Visit the preview URL for this PR (updated for commit 8c8bb2b):

https://walletrc--pull-3272-merge-v2pan1ah.web.app

_{(expires Wed, 05 Nov 2025 06:24:54 GMT)}

_{🔥 via Firebase Hosting GitHub Action 🌎}

_{Sign: f66a4ff03faa546f12f0ae5a841bd9eff2714dcc}

[takenagain]

Confirmed activation state alignment in Web, including parent assets when a child/token is selected. Additionally, verified that the same behaviour occurs on the Swap (Sell and Buy) and Bridge pages via activateCoinIfNeeded.