fix: update trivia test to mock events instead of dashboardService

The trivia service now emits domain events via systemEvents instead
of directly calling dashboardService.recordEvent. Updated the test
mock and assertions to match.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

shared/modules/trivia/trivia.service.test.ts

@@ -14,8 +14,6 @@ const mockReturning = mock();
 const mockSet = mock();
 const mockWhere = mock();
 const mockOnConflictDoUpdate = mock();
-const mockRecordEvent = mock(() => Promise.resolve());
-
 // Chain setup
 mockInsert.mockReturnValue({ values: mockValues });
 mockValues.mockReturnValue({
@@ -69,10 +67,17 @@ mock.module("@shared/lib/config", () => ({
     }
 }));
 
-// Mock Dashboard Service
-mock.module("@shared/modules/dashboard/dashboard.service", () => ({
-    dashboardService: {
-        recordEvent: mockRecordEvent
+// Mock Events (trivia service emits domain events instead of calling dashboardService directly)
+const mockEmit = mock(() => true);
+mock.module("@shared/lib/events", () => ({
+    systemEvents: {
+        emit: mockEmit,
+    },
+    EVENTS: {
+        DOMAIN: {
+            TRIVIA_STARTED: "domain:trivia_started",
+            TRIVIA_WON: "domain:trivia_won",
+        }
     }
 }));
 
@@ -109,7 +114,7 @@ describe("TriviaService", () => {
         mockSet.mockClear();
         mockWhere.mockClear();
         mockOnConflictDoUpdate.mockClear();
-        mockRecordEvent.mockClear();
+        mockEmit.mockClear();
         // Clear active sessions
         (triviaService as any).activeSessions.clear();
     });
@@ -176,8 +181,8 @@ describe("TriviaService", () => {
             expect(mockInsert).toHaveBeenCalledWith(userTimers);
             expect(mockOnConflictDoUpdate).toHaveBeenCalled();
 
-            // Check dashboard event
-            expect(mockRecordEvent).toHaveBeenCalled();
+            // Check domain event emitted
+            expect(mockEmit).toHaveBeenCalled();
         });
 
         it("should throw error if user has insufficient balance", async () => {
@@ -219,7 +224,7 @@ describe("TriviaService", () => {
             // Verify balance update
             expect(mockUpdate).toHaveBeenCalledWith(users);
             expect(mockInsert).toHaveBeenCalledWith(transactions);
-            expect(mockRecordEvent).toHaveBeenCalled();
+            expect(mockEmit).toHaveBeenCalled();
         });
 
         it("should not award prize for incorrect answer", async () => {