Fix magic apiary GUI bypassing claim protection

[Eldrinn-Elantey]

Summary

• BlockMagicApiary.onBlockActivated() called player.openGui() on both client and server instead of server-only, causing the client to open a phantom GUI with windowId=0
• When claim protection mods (e.g. ServerUtilities) cancelled the server-side interaction and sent forceUpdate(inventoryContainer)`, the window-0 packets were misapplied to the phantom apiary container - causing the player's equipped armor to appear in the produce slots
• Added !world.isRemote guard so the GUI is only opened server-side, matching standard Forge practice