Validate configured MAC addresses in desktop/mobile editors and ordinary,
managed, and custom-identity save paths before credential writes. Preserve
the Auto Wake preference while editing and add localized invalid-address
feedback with regression coverage for rejected writes.
Keep production artwork observation unchanged. Diagnostics confirmed an
inherited hosted-test static-link identity issue; temporary linker and
trace experiments were removed without weakening behavioral assertions.
Validation: 83 focused macOS tests passed; iOS MAC cases passed while the
two known hosted-test identity/artwork failures remain.
Kaede Akino