Change silences to always require approval on follow (#11975)

* Change silenced accounts to require approval on follow

* Also require approval for follows by people explicitly muted by target accounts

* Do not auto-accept silenced or muted accounts when switching from locked to unlocked

* Add `follow_requests_count` to verify_credentials

* Show “Follow requests” menu item if needed even if account is locked

* Add tests

* Correctly reflect that follow requests weren't auto-accepted when local account is silenced

* Accept follow requests from user-muted accounts to avoid leaking mutes

app/serializers/rest/credential_account_serializer.rb

@@ -12,6 +12,7 @@ class REST::CredentialAccountSerializer < REST::AccountSerializer
       language: user.setting_default_language,
       note: object.note,
       fields: object.fields.map(&:to_h),
+      follow_requests_count: FollowRequest.where(target_account: object).limit(40).count,
     }
   end
 end