Restore actually restores, map stops crashing, imports stop lying

Highlights

• · Backup restore rebuilt to close the silent-failure class (was the GA blocker) - it actually restores now, and the 'YOU ARE HERE' marker on the timeline honestly reflects what's on disk after a restore instead of drifting to the safety backup
• · Map stability: no more crash when you click a POI marker, overlays and data reset properly when you switch servers or worlds, Rebuild Images runs in the background (keep using the map while it reassembles), and there's a Start Over button if you need it
• · Server import is more honest: progress events actually flow, silent-failure class closed with real error surfacing, and keep-source-ports imports no longer collide on the MCA plugin port
• · Richer diagnostic packages: now pick up per-server configs, docker inspect output, and plugin/mod/datapack listings - with secret redaction extended to cover nested configs and docker env arrays. Future investigations land faster
• · Setup wizard polish: RAM ceiling matches your actual system, version chip row scrolls cleanly inside the modal, better delete-world checkbox behavior
• · Quality-of-life: activity chart toggles stay visible when enabled, hibernation tab hidden for normal users, in-app link to release notes, settings list scrolls internally instead of blowing out the layout