feat!: Remove useCaip25Permission feature flag and enable behaviour by default

[Mrtenz]

This removes the useCaip25Permission feature flag for the SnapController and enables the CAIP-25 behaviour by default.

Breaking changes

• The SnapController no longer accepts the useCaip25Permission feature flag.

---

Note

Removes the useCaip25Permission feature flag and always grants endowment:caip25 when a Snap requests endowment:ethereum-provider, updating tests accordingly.

• SnapController:
  • Remove FeatureFlags.useCaip25Permission.
  • Always add endowment:caip25 (with authorizedScopes caveat based on selected network) when endowment:ethereum-provider is requested in #getPermissionsToGrant.
• Tests (SnapController.test.tsx):
  • Update install/update tests to expect CAIP-25 without feature flag.
  • Remove tests covering the disabled-flag case.
  • Adjust test setup/options to drop featureFlags.useCaip25Permission.

^{Written by Cursor Bugbot for commit bd0c978. This will update automatically on new commits. Configure here.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.27%. Comparing base (8571a4d) to head (bd0c978).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3413      +/-   ##
==========================================
- Coverage   98.27%   98.27%   -0.01%     
==========================================
  Files         417      417              
  Lines       11903    11901       -2     
  Branches     1845     1843       -2     
==========================================
- Hits        11698    11696       -2     
  Misses        205      205              

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[georgewrmarshall]

@metamaskbot publish-preview