Potion Legacy - Realistic potion making addon

Improvements

1. Brewing minigame — stir direction: stir notes now turn the cauldron spoon in the matching direction (clockwise for →, counter-clockwise for ←) instead of always the same way.
2. Brewing minigame — reactive fire: the fire now responds to the fire notes — it flares up when you stoke (▲) and dips when you damp (▼). Visible to nearby players too.
3. Smoother throw preview: charging a potion throw no longer causes an FPS drop; the trajectory arc is computed far more efficiently.

Fixes

1. Fixed over-time effects (regeneration, poison, armor-over-time) leaving a lingering internal state after they wore off.
2. Fixed the antidote not fully clearing the poison state.
3. Fixed overlapping Size / Jump / Gravity potions leaving a permanent residual effect.