feat(state): nav panel store and expanded prefs

src/state/prefs.ts

@@ -1,4 +1,4 @@
-const PREFS_KEY = 'idlegame:prefs:v1';
+const PREFS_KEY = 'idlegame:prefs:v2';
 
 export type StoryOpenMode = 'auto' | 'choices-only' | 'manual';
 export type ActionDetailMode = 'inline' | 'hover' | 'info-button';
@@ -6,11 +6,15 @@ export type ActionDetailMode = 'inline' | 'hover' | 'info-button';
 export interface GamePrefs {
   storyOpenMode: StoryOpenMode;
   actionDetailMode: ActionDetailMode;
+  collapsedActionGroups: Record<string, boolean>;
+  showEventLog: boolean;
 }
 
 const DEFAULTS: GamePrefs = {
   storyOpenMode: 'auto',
   actionDetailMode: 'inline',
+  collapsedActionGroups: {},
+  showEventLog: true,
 };
 
 export function getPrefs(): GamePrefs {