Add rules edition setting for condition tooltips (5e/5.5e)

Introduce a settings modal (opened from the kebab menu) with a rules
edition selector for condition tooltip descriptions and a theme picker
replacing the inline cycle button. About half the conditions have
meaningful mechanical differences between editions.

- Add description5e field to ConditionDefinition with 5e (2014) text
- Add RulesEditionProvider context with localStorage persistence
- Create SettingsModal with Conditions and Theme sections
- Wire condition tooltips to edition-aware descriptions
- Fix 6 inaccurate 5.5e condition descriptions
- Update spec 003 with stories CC-3, CC-8 and FR-095–FR-102

Closes #12

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

packages/domain/src/__tests__/conditions.test.ts

@@ -0,0 +1,44 @@
+import { describe, expect, it } from "vitest";
+import {
+	CONDITION_DEFINITIONS,
+	getConditionDescription,
+} from "../conditions.js";
+
+function findCondition(id: string) {
+	const def = CONDITION_DEFINITIONS.find((d) => d.id === id);
+	if (!def) throw new Error(`Condition ${id} not found`);
+	return def;
+}
+
+describe("getConditionDescription", () => {
+	it("returns 5.5e description by default", () => {
+		const exhaustion = findCondition("exhaustion");
+		expect(getConditionDescription(exhaustion, "5.5e")).toBe(
+			exhaustion.description,
+		);
+	});
+
+	it("returns 5e description when edition is 5e", () => {
+		const exhaustion = findCondition("exhaustion");
+		expect(getConditionDescription(exhaustion, "5e")).toBe(
+			exhaustion.description5e,
+		);
+	});
+
+	it("every condition has both descriptions", () => {
+		for (const def of CONDITION_DEFINITIONS) {
+			expect(def.description).toBeTruthy();
+			expect(def.description5e).toBeTruthy();
+		}
+	});
+
+	it("conditions with identical rules share the same text", () => {
+		const blinded = findCondition("blinded");
+		expect(blinded.description).toBe(blinded.description5e);
+	});
+
+	it("conditions with different rules have different text", () => {
+		const exhaustion = findCondition("exhaustion");
+		expect(exhaustion.description).not.toBe(exhaustion.description5e);
+	});
+});