fix skill increases on skills with master variations

apps/skillulator/src/routes/c/$class/components/action-buttons.tsx

···
 					if (!props.jobId) return;
 					event.preventDefault();
 					if (event.key === "ArrowDown") {
-						decreaseSkillPoint(props.jobId, props.skill.id);
+						decreaseSkillPoint({
+							jobId: props.jobId,
+							skillId: props.skill.id,
+							masterVariationSkillId: props.masterVariationSkillId,
+						});
 					} else if (event.key === "ArrowUp") {
 						increaseSkillPoint({
 							jobId: props.jobId,
···
 			onContextMenu={(event) => {
 				if (!props.jobId) return;
 				event.preventDefault();
-				decreaseSkillPoint(props.jobId, props.skill.id);
+				decreaseSkillPoint({
+					jobId: props.jobId,
+					skillId: props.skill.id,
+					masterVariationSkillId: props.masterVariationSkillId,
+				});
 			}}
 			disabled={!props.hasMinLevelRequirements}
 			className="flex flex-col items-center disabled:cursor-not-allowed"

apps/skillulator/src/zustand/treeStore.ts

···
 		masterVariationSkillId?: number;
 	}) => void;
 	increaseSkillToMax: (jobId: number, skillId: number) => void;
-	decreaseSkillPoint: (jobId: number, skillId: number) => void;
+	decreaseSkillPoint: ({
+		jobId,
+		skillId,
+		masterVariationSkillId,
+	}: {
+		jobId: number;
+		skillId: number;
+		masterVariationSkillId?: number;
+	}) => void;
 	initSkillPoints: (jobId: number, characterLevel: number) => void;
 
 	createPreloadedSkillTree: (
···
 				 * Master variation skills don't live in the outer skill array, only within the skill they are variations of...
 				 */
 				const skill = getSkillById(skillId, job.skills);
-				if (skill?.masterVariations?.length) {
+				if (
+					skill?.masterVariations?.length &&
+					typeof masterVariationSkillId !== "undefined"
+				) {
 					if (!masterVariationSkillId) return state;
 					const masterVariationSkill = getSkillById(
 						masterVariationSkillId,
···
 				return state;
 			}),
 		),
-	decreaseSkillPoint: (jobId: number, skillId: number) =>
+	decreaseSkillPoint: ({
+		jobId,
+		skillId,
+		masterVariationSkillId,
+	}: { jobId: number; skillId: number; masterVariationSkillId?: number }) =>
 		set(
 			produce((state: State) => {
 				const job = getJobById(jobId, state.jobTree);
 				if (!job) return state;
 
 				const skill = getSkillById(skillId, job.skills);
+				if (
+					skill?.masterVariations?.length &&
+					typeof masterVariationSkillId !== "undefined"
+				) {
+					if (!masterVariationSkillId) return state;
+					const masterVariationSkill = getSkillById(
+						masterVariationSkillId,
+						skill.masterVariations,
+					);
+
+					if (!masterVariationSkill || masterVariationSkill.skillLevel === 0)
+						return state;
+
+					masterVariationSkill.skillLevel -= 1;
+					state.skillPoints += masterVariationSkill.points;
+
+					updateSkillRequirements(
+						job,
+						masterVariationSkillId,
+						masterVariationSkill.skillLevel,
+					);
+					return state;
+				}
+
 				if (!skill || skill.skillLevel === 0) return state;
 
 				skill.skillLevel -= 1;