+inv

View your inventory or another player's inventory.

Usage:
+inv - Show your inventory
+inv <player> - Show another player's inventory (Staff only)
+inv/prove <id> - Prove a piece of equipment you own
+inv/view <id> - View detailed information about an inventory item

The inventory system tracks all equipment you have requested or been granted.
Each item shows its quantity and proof status. Staff members can view other
players' inventories.