OmniPanel v18.5.303 - Main Panel Stability, Rules and Repair

- Removed duplicate Kit Manager, Event Studio and Server Rules entries from Command Center.
- Kept Kit Manager and Event Studio as first-class Main Panel sections.
- Added a direct config-driven Server Rules button to the Main Panel.
- Added a consolidated Community Hub for server Discord, creator links, rules and Discord Bridge access.
- Renamed the existing Systems Core presentation to Server Intelligence while preserving its current route.
- Repaired rules loading for both YAML list and YAML section/map formats without rewriting existing data.
- Added a real Repair Equipment action to Admin Tools and Command Center.
- Repair Equipment repairs every damaged Damageable item, including armor and offhand, without requiring Mending.
- Added identity-safe item scanning so the same inventory item is never counted or modified twice.
- Kept one route per feature and added no replacement managers or duplicate listeners.
