fix: predict confirmation balance usage

[matthewwalsh0]

Description

Replace all usages of dummy selector with actual Predict balance.

Update imported token details.

Fix delay when using percentage buttons.

Changelog

CHANGELOG entry: null

Related issues

Fixes: #6127 #21749

Manual testing steps

Screenshots/Recordings

Before

After

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• I’ve followed MetaMask Contributor Docs and MetaMask Mobile Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

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Note

Replaces dummy Predict balance with usePredictBalance across confirmations, migrates token constants to rich objects, and updates CustomAmount UI and percentage logic (no debounce).

• Predict balance & alerts:
  • Replace dummy selector usages with usePredictBalance in useInsufficientPredictBalanceAlert and useTransactionCustomAmount (and related tests), removing predict-temp.
• Token constants & add-token:
  • Consolidate to objects ARBITRUM_USDC and POLYGON_USDCE with address/decimals/name/symbol and update imports/usages (including useTokenFiatRates, TransactionDetailsStatus).
  • Extend useAddToken to include name; update PerpsDepositInfo/PredictDepositInfo and tests.
• Custom amount UI/behavior:
  • Switch CustomAmount from inputs to static Text display; tweak styles (alignItems, lineHeight) and tests.
  • updatePendingAmountPercentage sets amountFiat directly to remove debounce delay.
• Tests & cleanup:
  • Update/adjust affected tests; remove Blockaid banner test; minor mocks cleanup.

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[sonarqubecloud]

Quality Gate passed

Issues
3 New issues
0 Accepted issues

Measures
0 Security Hotspots
84.6% Coverage on New Code
0.0% Duplication on New Code

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