v1.5.9
About-tab redesign + in-app update check
- Aligned About screen layout — Release Channel and Runtime sections share a clean key/value grid that's easier to scan and to copy into support tickets.
- Check-for-updates button in the About screen header — pull a new version manually without diving into the tray menu.
- Plain-English labels — "Connection protocol" and "Signed by" replace the previous insider-shorthand, each with a one-line caption explaining what the row means.
- DEV pill — when running an unpackaged development build, a small pill appears next to the version so there's never any doubt whether you're looking at the real app or a local dev copy.
No functional changes beyond the About tab. Auto-update path unchanged from 1.5.8.