fix: PlayerItemUseEvent firing twice on right-click

[bobyD3V]

Fixes #28

Changes

Found the bug - handleRightClickItemUse() gets called twice for one
right-click. This happens because START_USING_ITEM flag triggers it once,
and then itemInteractionData (ACTION_CLICK_AIR) triggers it again, both
from the same PlayerAuthInputPacket. Added a check so it only fires once
now.

Tests

Tested with a test plugin that spawns something on PlayerItemUseEvent.
Before the fix it spawned twice per click, now it only spawns once.

[xRookieFight]

I couldn't reproduce the bug before, can you send some footage for it?

[bobyD3V]

Here video showing what happening. Made a quick test plugin that
logs PlayerItemUseEvent with a timestamp. One right-click, two events,
~39ms apart - way too fast to be an actual second click:

[REPRO] PlayerItemUseEvent fired at 1,786,615,214.972
[REPRO] PlayerItemUseEvent fired at 1,786,615,215.011

[video attached]

Screenrecorder-2026-08-13-15-30-12-121.mp4

[xRookieFight]

I assume it's only happening on fishing rod, right? It's not reproducable on other items.

[bobyD3V]

I try more with some items like

• Fishing rod: happens X (double fires)
• Bow: happens X (double fires)
• Food, potion, sword, stick: doesn't happen (fires once, normal)

So it looks like it's specific to items that have a "charge up" / hold-to-use
action (fishing rod, bow) rather than instant-use items like food or potions.

[xRookieFight]

Hmm, okay. I'll review the code. I assume this is new on 1.26.40 so it also may be a protocol issue too