Haven Bags

- Fixed bag nesting edge cases, including stale parent-link data and cross-owner loop prevention.
- Improved teleport safety to prevent random fall damage after entering/exiting Haven Bags.
- Reworked companion transfers: followers/leashed pets move reliably, wanderers stay behind, and mounted entry/exit is blocked.
- Fixed lock UI/state sync issues and cleaned lock controls/icons for better readability.
- Split lock behavior cleanly (player access, mob access, break protection) with safer default lock behavior.
- Excluded cobblemon:pokemon from Haven Bag companion-transfer handling.
- Updated Haven Gem loot tuning: default Base Haven Gem chance is now 10%, upgrade gems now 1% each.
- Added generated loot-rate config support via config/havenbag-loot-rates.json.
- Standardized direct mob entry to use the same inside-pocket spawn logic as follower/lead companion transfers.