feat(anchors): add interactive SEP-24 transfer modal

[Taiye21]

Add a reusable interactive anchor transfer modal and polling hook. SEP-24 sessions are shown in a responsive iframe with a new-tab fallback, status feedback, retries, and terminal polling behavior.

Closes #210

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[mergekeeper]

Needs changes

Missing unit tests for the anchor polling mechanism specified in the testing requirements.

• src/lib/__tests__/anchor.test.ts: Create src/lib/tests/anchor.test.ts to write unit tests for the polling mechanism ensuring it stops polling upon terminal events as requested in the issue test plan.

Reviewed commit: abf2453d2f32860fac7bc223bf81256b8fedcdc1.

[mergekeeper]

Needs changes

Missing unit tests for the anchor polling mechanism specified in the testing requirements.

• src/lib/__tests__/anchor.test.ts: Create src/lib/tests/anchor.test.ts to write unit tests for the polling mechanism ensuring it stops polling upon terminal events as requested in the issue test plan.

Reviewed commit: abf2453d2f32860fac7bc223bf81256b8fedcdc1.

[Taiye21]

Hi @Cjay-Cyber-2, the implementation for issue #210 is pushed on the requested fork branch and this PR is ready for review. Closes #210.

[mergekeeper]

MergeKeeper review

Scope: in scope for linked issue #210.
Verdict: clean

The pull request correctly implements the SEP-24 interactive anchor deposit and withdrawal workflow with modal handling, polling behavior, and corresponding unit tests.

Reviewed commit: 3e883a7046102966909afe429c477e26439e8cd1.
CI and merge eligibility are checked separately.

[Taiye21]

Added src/lib/__tests__/anchor.test.ts covering terminal SEP-24 statuses, continued pending polling, and persistent polling-failure cutoff. The fix is pushed to fix/issue-210.

[mergekeeper]

Needs review

Linked to #210, but the diff does not match the issue scope.

The pull request modifies and removes unrelated code (such as expense creation logic and invite hooks) that falls outside the scope of issue #210.

Reviewed commit: bd9d1e8e514844118da6e9b93ad77e7ba7b82adb.

[Taiye21]

✅ Merge conflicts resolved against upstream main and anchor changes preserved in commit a48dc7a. @mergepay please review the updated branch.

[mergekeeper]

MergeKeeper review unavailable

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No approval or merge action was taken.