Enforce maximum values for PF2e numbered conditions

Cap dying (4), doomed (3), wounded (3), and slowed (3) at their
rule-defined maximums. The domain clamps values in setConditionValue
and the condition picker disables the [+] button at the cap.

Closes #31

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/domain/src/__tests__/toggle-condition.test.ts

@@ -169,6 +169,60 @@ describe("setConditionValue", () => {
 		);
 		expectDomainError(result, "unknown-condition");
 	});
+
+	it("clamps value to maxValue for capped conditions", () => {
+		const e = enc([makeCombatant("A")]);
+		const result = setConditionValue(e, combatantId("A"), "dying", 6);
+		if (isDomainError(result)) throw new Error(result.message);
+
+		expect(result.encounter.combatants[0].conditions).toEqual([
+			{ id: "dying", value: 4 },
+		]);
+		expect(result.events[0]).toMatchObject({
+			type: "ConditionAdded",
+			value: 4,
+		});
+	});
+
+	it("allows value at exactly the max", () => {
+		const e = enc([makeCombatant("A")]);
+		const result = setConditionValue(e, combatantId("A"), "doomed", 3);
+		if (isDomainError(result)) throw new Error(result.message);
+
+		expect(result.encounter.combatants[0].conditions).toEqual([
+			{ id: "doomed", value: 3 },
+		]);
+	});
+
+	it("allows value below the max", () => {
+		const e = enc([makeCombatant("A")]);
+		const result = setConditionValue(e, combatantId("A"), "wounded", 2);
+		if (isDomainError(result)) throw new Error(result.message);
+
+		expect(result.encounter.combatants[0].conditions).toEqual([
+			{ id: "wounded", value: 2 },
+		]);
+	});
+
+	it("does not cap conditions without a maxValue", () => {
+		const e = enc([makeCombatant("A")]);
+		const result = setConditionValue(e, combatantId("A"), "frightened", 10);
+		if (isDomainError(result)) throw new Error(result.message);
+
+		expect(result.encounter.combatants[0].conditions).toEqual([
+			{ id: "frightened", value: 10 },
+		]);
+	});
+
+	it("clamps when updating an existing capped condition", () => {
+		const e = enc([makeCombatant("A", [{ id: "slowed-pf2e", value: 2 }])]);
+		const result = setConditionValue(e, combatantId("A"), "slowed-pf2e", 5);
+		if (isDomainError(result)) throw new Error(result.message);
+
+		expect(result.encounter.combatants[0].conditions).toEqual([
+			{ id: "slowed-pf2e", value: 3 },
+		]);
+	});
 });
 
 describe("decrementCondition", () => {