docs: document story engine and PR2 playable loop

src/state/runtime.ts

@@ -6,21 +6,17 @@ import {
   isActionAvailable,
   tickGame,
 } from '../engine/game';
-import {
-  applyChoice as engineApplyChoice,
-  enterStoryNode,
-  initStory,
-} from '../engine/story';
+import { applyChoice as engineApplyChoice, enterStoryNode, initStory } from '../engine/story';
 import { advance, createTickLoop, TICK_MS, type TickLoop } from '../engine/tickLoop';
 import { createDefaultBackend, loadGame, type SaveBackend, saveGame } from './persistence';
 import { getPrefs } from './prefs';
+import { useGameStore } from './store';
 import {
   processStoryTriggers,
+  type StoryUiEffect,
   shouldAutoOpenPanel,
   storyEventsToLogEntries,
-  type StoryUiEffect,
 } from './storyOrchestration';
-import { useGameStore } from './store';
 import { formatOfflineDuration, toView } from './viewModel';
 
 /**
@@ -153,9 +149,7 @@ class GameRuntime {
       const store = useGameStore.getState();
       for (const entry of entries) store.appendStoryLog(entry);
       for (const entry of entries) {
-        store.appendLog(
-          `Story: ${content.storyNodesById[entry.nodeId]?.prose.slice(0, 40)}…`,
-        );
+        store.appendLog(`Story: ${content.storyNodesById[entry.nodeId]?.prose.slice(0, 40)}…`);
       }
       const prefs = store.prefs;
       if (shouldAutoOpenPanel(prefs, 'fork_choice', content)) {

src/state/store.ts

@@ -1,5 +1,5 @@
 import { create } from 'zustand';
-import { getPrefs, setPrefs as persistPrefs, type GamePrefs } from './prefs';
+import { type GamePrefs, getPrefs, setPrefs as persistPrefs } from './prefs';
 import type { GameView } from './viewModel';
 
 /**

src/state/viewModel.ts

@@ -2,8 +2,8 @@ import type { GameContent } from '../content/index';
 import {
   canAffordAction,
   canUnlockAction,
-  isActionAvailable,
   type GameState,
+  isActionAvailable,
 } from '../engine/game';
 import { getAvailableChoices, getCurrentNode } from '../engine/story';