Story quests now have physical pickup and turn-in
Story quests now require a physical dock.
- Reworked the faction arcs into chapter-by-chapter quest chains instead of one invisible background quest.
- Added explicit pickup and turn-in docks to every story quest.
- Added a permanent tracker entry pointing to the next quest pickup when no story quest is active.
- Fixed cross-quest choices carrying forward into later quests in the chain.