feat: v0.6.0 balance pass, quest-gated bosses, and achievement fixes

apps/api/test/services/prestige.spec.ts

@@ -120,9 +120,9 @@ describe("calculateRunestones", () => {
   });
 
   it("caps base runestones before multipliers", () => {
-    // cbrt(9_261_000_000 / 1_000_000) = cbrt(9261) = 21 → 21 × 20 = 420, capped at 200
+    // cbrt(9_261_000_000 / 1_000_000) = cbrt(9261) = 21 → 21 × 20 = 420, capped at 400
     const result = calculateRunestones({ totalGoldEarned: 9_261_000_000, prestigeCount: 0, purchasedUpgradeIds: [] });
-    expect(result).toBe(200);
+    expect(result).toBe(400);
   });
 });
 
@@ -229,6 +229,19 @@ describe("buildPostPrestigeState", () => {
     expect(prestigeState.story).toEqual(story);
   });
 
+  it("persists active companion selection across prestige", () => {
+    const companions = { unlockedCompanionIds: ["lyra", "sera"], activeCompanionId: "lyra" };
+    const state = makeMinimalState({ companions });
+    const { prestigeState } = buildPostPrestigeState(state, "Tester");
+    expect(prestigeState.companions).toEqual(companions);
+  });
+
+  it("falls back to fresh companion state when currentState.companions is undefined", () => {
+    const state = makeMinimalState({ companions: undefined });
+    const { prestigeState } = buildPostPrestigeState(state, "Tester");
+    expect(prestigeState.companions).toEqual({ activeCompanionId: null, unlockedCompanionIds: [] });
+  });
+
   it("persists transcendence from current state", () => {
     const transcendence = {
       count: 1, echoes: 10, purchasedUpgradeIds: [],