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>

apps/web/src/hooks/use-rules-edition.ts

@@ -0,0 +1,52 @@
+import type { RulesEdition } from "@initiative/domain";
+import { useCallback, useSyncExternalStore } from "react";
+
+const STORAGE_KEY = "initiative:rules-edition";
+
+const listeners = new Set<() => void>();
+let currentEdition: RulesEdition = loadEdition();
+
+function loadEdition(): RulesEdition {
+	try {
+		const raw = localStorage.getItem(STORAGE_KEY);
+		if (raw === "5e" || raw === "5.5e") return raw;
+	} catch {
+		// storage unavailable
+	}
+	return "5.5e";
+}
+
+function saveEdition(edition: RulesEdition): void {
+	try {
+		localStorage.setItem(STORAGE_KEY, edition);
+	} catch {
+		// quota exceeded or storage unavailable
+	}
+}
+
+function notifyAll(): void {
+	for (const listener of listeners) {
+		listener();
+	}
+}
+
+function subscribe(callback: () => void): () => void {
+	listeners.add(callback);
+	return () => listeners.delete(callback);
+}
+
+function getSnapshot(): RulesEdition {
+	return currentEdition;
+}
+
+export function useRulesEdition() {
+	const edition = useSyncExternalStore(subscribe, getSnapshot);
+
+	const setEdition = useCallback((next: RulesEdition) => {
+		currentEdition = next;
+		saveEdition(next);
+		notifyAll();
+	}, []);
+
+	return { edition, setEdition } as const;
+}