Latch v0.4.3.1

Patch release — includes all post-v0.4.3.0 fixes tested on latch.network.

Added

• Admin plugins UI — Installed / Catalog tabs, icon actions, in-panel remove
• fix-perms overhaul — all storage/ paths + plugins/ code; --web-user switch

Fixed

• GitHub catalog zip download (HTTP 302 redirect)
• Catalog install plugins/ permissions (RPM + fix-perms)
• sudo latch fix-perms and plugin remove stay root when needed
• Admin plugins page 500 (Request::input for tab param)

Upgrade: sudo dnf upgrade latch after COPR builds, or scripts/update.sh from tarball.

Full checklist: docs/RELEASE.md