T3 Code Nightly 0.0.30-nightly.20260728.931 (9ccfd9dfef4e)

What's Changed

• Make mobile Thread List v2 the default by @juliusmarminge in #4717
• Fix mobile showcase workflow without Clerk by @juliusmarminge in #4718
• Fix relay credential lookup for unlinked environments by @juliusmarminge in #4692
• Settle merged PR threads immediately by @t3dotgg in #4704
• feat(web): add maria's sidebar header artwork toggle by @maxktz in #4652
• feat(web): add appearance settings category by @maxktz in #4715
• fix(desktop): allow updater-controlled relaunch by @0x4bs3nt in #4721

Full Changelog: v0.0.30-nightly.20260728.930...v0.0.30-nightly.20260728.931