* test: add E2E test for duplicate send access request
Add send-access.spec.ts verifying:
- First request succeeds and balance matches DEFAULT_SEND_BALANCE
- Duplicate request returns 400 (UNIQUE constraint)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* test: assert response body contains 'Already' for duplicate send access
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Add mail-detail.spec.ts with two test cases:
- Fetch a seeded mail by ID and verify fields (id, address, source, raw)
- Fetch non-existent mail ID returns null
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
