fix(tests): resolve 6 pre-existing test failures in pet-profile and stories suites

Prisma mock was missing the inviteCode model entirely, so pets.create's
starter-invite-code check crashed on undefined.count(). STORY-02 tests
mocked story.count, but hasActiveStory actually calls story.findMany
(needs the ids for the follow-up storyView.count query) — updated the
tests to match the real implementation.

src/__tests__/helpers/prisma-mock.ts

@@ -30,6 +30,11 @@ interface MockOwnerClient {
   update: MockFn;
 }
 
+interface MockInviteCodeClient {
+  count: MockFn;
+  createMany: MockFn;
+}
+
 interface MockLegalDocumentVersionClient {
   create: MockFn;
   findMany: MockFn;
@@ -203,6 +208,7 @@ interface MockNotificationClient {
 interface MockPrismaClient {
   pet: MockPetClient;
   owner: MockOwnerClient;
+  inviteCode: MockInviteCodeClient;
   species: MockSpeciesClient;
   breed: MockBreedClient;
   // Phase 2
@@ -249,6 +255,12 @@ export function createMockPrisma(): MockPrismaClient {
       create: vi.fn(),
       update: vi.fn(),
     },
+    // pets.create's idempotent starter-invite-code seeding runs on every call —
+    // default to "no codes yet" so tests unrelated to invites don't need to stub it.
+    inviteCode: {
+      count: vi.fn().mockResolvedValue(0),
+      createMany: vi.fn().mockResolvedValue({ count: 0 }),
+    },
     legalDocumentVersion: {
       create: vi.fn(),
       findMany: vi.fn(),

src/__tests__/stories.test.ts

@@ -97,12 +97,12 @@ describe("stories.hasActiveStory", () => {
   it("STORY-02 — hasActiveStory returns true when a non-expired story exists", async () => {
     const { caller, mockPrisma } = createCaller();
 
-    mockPrisma.story.count.mockResolvedValue(1);
+    mockPrisma.story.findMany.mockResolvedValue([{ id: "story-1" }]);
 
     const result = await caller.hasActiveStory({ petId: "pet-1" });
 
-    expect(result).toBe(true);
-    expect(mockPrisma.story.count).toHaveBeenCalledWith(
+    expect(result).toMatchObject({ hasStory: true });
+    expect(mockPrisma.story.findMany).toHaveBeenCalledWith(
       expect.objectContaining({
         where: expect.objectContaining({
           petId: "pet-1",
@@ -115,11 +115,11 @@ describe("stories.hasActiveStory", () => {
   it("STORY-02 — hasActiveStory returns false when no active stories exist", async () => {
     const { caller, mockPrisma } = createCaller();
 
-    mockPrisma.story.count.mockResolvedValue(0);
+    mockPrisma.story.findMany.mockResolvedValue([]);
 
     const result = await caller.hasActiveStory({ petId: "pet-1" });
 
-    expect(result).toBe(false);
+    expect(result).toMatchObject({ hasStory: false });
   });
 });