Release v4.7.16-beta.1

What's Changed

• fix(update): correct status messaging and settings control layout (09f27953)
• docs: cover multimodal fallback, Zed sign-in, and manual update/abort controls (908585d3)
• chore: remove unreachable RequestModelID and testutil.NewRequest (b2e0f97f)
• test: remove low-value go and js tests (315f203f)
• fix(web): refresh model test priority tooltip locale (ec7294a4)
• docs: align architecture diagram with dual entries, cooldown loop, and health score (adb8fc96)
• feat(channels): show pending protocol reprobes (7015cb2c)

Full Changelog: v4.7.15-beta.1...v4.7.16-beta.1