chore: QA docs updated

[jvbriones]

Description

Changelog

CHANGELOG entry:

Related issues

Fixes:

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

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

Introduces a network connection banner with redux state, SDKConnect V2 RPC bridge and controller wiring, new rewards UI components/hooks, multiple store migrations, and large E2E testing/infra additions (including AI-based test selector) with cleanup of legacy pieces.

• Core/Engine:
  • Add controller init + messengers for PermissionController, PreferencesController, SelectedNetworkController, SubjectMetadataController, and PredictController.
  • Implement SDKConnect V2 RPCBridgeAdapter with onboarding/engine readiness utilities and logging.
  • Add QR keyring helpers and redux slice for QR scanner.
  • Expand Snaps permissions wiring.
• Store/Migrations:
  • Migration 101: remove unused UserStorageController flags.
  • Migration 102: convert deposit order string IDs to typed objects.
  • Migration 103: rename popular network display names.
• Networking:
  • New useNetworkConnectionBanner hook, reducer, selector; banner telemetry.
• Rewards/UI:
  • Add RewardsThemeImageComponent, useRewardsAnimation, rewards intro modal hook; remove SeasonTierImage.
• Deeplinks:
  • Add handlers for rewards and home URLs; replace Return-to-App modal with toast-based notification.
• Analytics:
  • Add vault corruption tracking utility.
• E2E/Infra:
  • Add extensive new specs (accounts, confirmations, networks, perps, performance), Appwright selectors/gestures, API mocks, and docs.
  • Introduce AI-driven E2E tag selector and GitHub workflow support; update environment/testing docs.
  • Add repack/fingerprint scripts; clean up legacy patches/scripts.

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[cursor]

Bug: Error Handling Fails with Null Order

When an error occurs in placeBuyOrder, the onError callback is invoked with a null currentOrder because the order hasn't been successfully registered or processed. Additionally, the loading state remains true when onError is called, as setIsPlacing(false) is only executed in the finally block.