[Feature Request] Token should be imported to all accounts in specific chain.

### What is this about?

When I import token in a chain I want it to be imported in every account I have.

### Scenario

_No response_

### Design

_No response_

### Technical Details

_No response_

### Threat Modeling Framework

_No response_

### Acceptance Criteria

_No response_

### Stakeholder review needed before the work gets merged

- [X] Engineering (needed in most cases)
- [ ] Design
- [ ] Product
- [ ] QA (automation tests are required to pass before merging PRs but not all changes are covered by automation tests - please review if QA is needed beyond automation tests)
- [ ] Security
- [ ] Legal
- [ ] Marketing
- [ ] Management (please specify)
- [ ] Other (please specify)

### References

_No response_

The issue names no files, tests, or entry points. First clarify whether importing a token should update every account on the selected chain and define the expected behavior for existing and newly selected accounts; then locate the token-import flow and its account-state tests. Done means the behavior is specified, implemented, and covered by tests.

Written by the indexing model from the issue text.