feat: add zone system to bosses and quests

apps/api/src/routes/game.ts

@@ -72,6 +72,8 @@ gameRouter.get("/load", async (context) => {
   // Backfill new quests and upgrades from defaults (add missing ones)
   const { DEFAULT_QUESTS } = await import("../data/quests.js");
   const { DEFAULT_UPGRADES } = await import("../data/upgrades.js");
+  const { DEFAULT_ZONES } = await import("../data/zones.js");
+  const { DEFAULT_BOSSES } = await import("../data/bosses.js");
 
   for (const defaultQuest of DEFAULT_QUESTS) {
     if (!state.quests.some((q) => q.id === defaultQuest.id)) {
@@ -80,6 +82,15 @@ gameRouter.get("/load", async (context) => {
     }
   }
 
+  // Backfill zoneId on quests that predate the field
+  for (const quest of state.quests) {
+    if (!quest.zoneId) {
+      const defaults = DEFAULT_QUESTS.find((d) => d.id === quest.id);
+      quest.zoneId = defaults?.zoneId ?? "verdant_vale";
+      needsBackfill = true;
+    }
+  }
+
   for (const defaultUpgrade of DEFAULT_UPGRADES) {
     if (!state.upgrades.some((u) => u.id === defaultUpgrade.id)) {
       state.upgrades.push(structuredClone(defaultUpgrade));
@@ -87,6 +98,30 @@ gameRouter.get("/load", async (context) => {
     }
   }
 
+  // Backfill zones on saves that predate the feature
+  if (!Array.isArray(state.zones) || state.zones.length === 0) {
+    state.zones = structuredClone(DEFAULT_ZONES);
+    // Infer unlock state from defeated bosses
+    for (const zone of state.zones) {
+      if (zone.unlockBossId != null) {
+        const unlockBoss = state.bosses.find((b) => b.id === zone.unlockBossId);
+        if (unlockBoss?.status === "defeated") {
+          zone.status = "unlocked";
+        }
+      }
+    }
+    needsBackfill = true;
+  }
+
+  // Backfill zoneId on bosses that predate the field
+  for (const boss of state.bosses) {
+    if (!boss.zoneId) {
+      const defaults = DEFAULT_BOSSES.find((d) => d.id === boss.id);
+      boss.zoneId = defaults?.zoneId ?? "verdant_vale";
+      needsBackfill = true;
+    }
+  }
+
   const now = Date.now();
 
   const { offlineGold, offlineSeconds } = calculateOfflineGold(state, now);