feat: scaffold mvp shell and content runtime

js/content/default-player-state.js

@@ -0,0 +1,45 @@
+export function createDefaultPlayerState() {
+  return {
+    saveVersion: 2,
+    unlockedCities: ['beijing'],
+    levelProgress: {},
+    collectedCats: [],
+    collectedMagnets: [],
+    collectedStamps: [],
+    cityTeam: {
+      teamCityId: null,
+      joinedDate: null,
+      lastSwitchDate: null,
+    },
+    passportStamps: [],
+    inventory: {
+      undo: 3,
+      remove: 1,
+      shuffle: 1,
+    },
+    dailyChallenge: {
+      date: '',
+      completed: false,
+      cityId: 'beijing',
+      seed: 0,
+    },
+    adCooldowns: {
+      interstitialCount: 0,
+      lastInterstitialTime: 0,
+      lastRewardDate: '',
+    },
+    settings: {
+      soundEnabled: true,
+      musicEnabled: true,
+      vibrationEnabled: true,
+    },
+    stats: {
+      totalGamesPlayed: 0,
+      totalGamesWon: 0,
+      totalShareCount: 0,
+      firstPlayDate: '',
+    },
+  }
+}
+
+export default createDefaultPlayerState