chore: remove legacy confirmation code

[OGPoyraz]

Description

Remove all legacy confirmation related code from the codebase.

List of actions:

• Legacy signature confirmations removed.
• Legacy transaction confirmations removed.
• Some components are still using legacy parts / utils, but those components are now under app/components/Views/confirmations/legacy/components. We will eventually remove/replace these components.
• transaction reducer and their actions removed.
• signatureRequest reducer and their actions removed.
• Removed reducers were storing security alerts, hence there is a new reducer securityAlerts to store security alerts for both transaction and signature confirmations.
• app/components/Nav/Main/RootRPCMethodsUI.js significantly simplified - removed unusued code and property connectors, we can now plan to make it more stable by doing TS conversion.
• confirmations_redesign feature flag and all it's references removed, no more useConfirmationsRedesign hook.
• Hardware wallets were already working as expected on redesigned confirmations, no logic changes here. Manual test of swaps already done, but we will ask team to test this PR exclusively.

Changelog

CHANGELOG entry:

Related issues

Fixes: https://github.com/MetaMask/MetaMask-planning/issues/5233

Manual testing steps

Feature: my feature name

  Scenario: user [verb for user action]
    Given [describe expected initial app state]

    When user [verb for user action]
    Then [describe expected outcome]

Screenshots/Recordings

Before

After

Hardware Wallet Recordings (Updated on 27 January 20:02)

Ledger send flow

ledger-send-flow.mp4

---

Ledger swap flow

ledger-swap-flow.mp4

---

QR Wallet send flow

qr-wallet-send-flow.mp4

---

QR Wallet swap flow

qr-wallet-swap-flow.mp4

Pre-merge author checklist

• 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.

---

Note

Removes legacy confirmation system and fully adopts the redesigned confirmations, simplifying navigation and data flow.

• Deletes legacy signature/transaction approval components, tests, and old transaction/signatureRequest actions/reducer; introduces unified securityAlerts storage and updates hooks (useSecurityAlertResponse) to read by confirmation ID
• Replaces legacy QR signing paths with new QRSigningTransactionModal (added to navigation) and routes all QR signing from Transactions and unified tx actions to this modal
• Simplifies RootRPCMethodsUI (drops Redux connectors/legacy transaction prep) and relies on redesigned confirmation routing via ConfirmRoot
• Removes useConfirmationRedesignEnabled and related feature flags; staking/earn flows default to redesigned paths; updates tests accordingly
• Removes pre-init send newAssetTransaction usage across UI (Wallet, Asset/Collectible views, QR scanner); send flow now navigates directly via redesigned hooks
• Consolidates Blockaid components under components/blockaid-banner and updates imports/usages across confirmation UIs
• Misc: cleans up QR modal to not dispatch reset actions, adjusts AccountInfo card to read signature requests, updates constants/names, and adds/refactors tests to match new flows

^{Written by Cursor Bugbot for commit e45d9f7. This will update automatically on new commits. Configure here.}

[cortisiko]

Can we move https://github.com/MetaMask/metamask-mobile/blob/chore/remove-legacy-confirmation-e2e-tests/e2e/specs/confirmations/transaction-pay.spec.ts to the confirmation redesign folder and get rid of the confirmations folder? There is only 1 test in there.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 80.00000% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.80%. Comparing base (63159f5) to head (bad5602).

Files with missing lines	Patch %	Lines
.../confirmations/components/confirm/confirm-root.tsx	50.00%	2 Missing and 2 partials ⚠️
.../components/UI/QRHardware/QRSigningModal/index.tsx	0.00%	1 Missing ⚠️
...nts/Views/confirmations/hooks/useConfirmActions.ts	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #24929      +/-   ##
==========================================
- Coverage   79.93%   74.80%   -5.14%     
==========================================
  Files        4257     4212      -45     
  Lines      109292   107162    -2130     
  Branches    22875    22754     -121     
==========================================
- Hits        87359    80159    -7200     
- Misses      15882    21168    +5286     
+ Partials     6051     5835     -216     

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[OGPoyraz]

Thanks for the feedback @cortisiko !
We want to get rid of "redesigned" wording and usage as this approach will be default. This is still good feedback - I will carry all confirmations-redesigned into confirmations folder

[github-actions]

🔍 Smart E2E Test Selection

⏭️ Smart E2E selection skipped - skip-smart-e2e-selection label found

All E2E tests pre-selected.

View GitHub Actions results

[cryptodev-2s]

LGTM!

[sonarqubecloud]

Quality Gate passed

Issues
9 New issues
0 Accepted issues

Measures
0 Security Hotspots
82.1% Coverage on New Code
3.2% Duplication on New Code

See analysis details on SonarQube Cloud

[caieu]

LGTM