Jevcast 1.21.2

Mail now keeps the active conversation highlighted when you use the arrow keys. Accounts show only a connection dot; click it for details. Conversations use one list row and show their downloaded replies together in the reader, with repeated HTML quotes hidden until requested.

This is a source release. No notarized app download is attached.

Verification:

• GitHub CI passed for this commit.
• Local full suite: 1,189 tests, 3 intentional skips, zero failures.
• Signed universal app and runner built and signature-verified.
• Focused tests cover keyboard navigation, bulk selection, and rendering replies with quoted text hidden or revealed. Demo renders cover normal and compact launcher layouts.

Physical keyboard acceptance is separate from the automated checks and demo renders.