fix: update test files for token handling and response parsing

- Update callers of createTestMediaItemID to not pass token
- Fix loginAdminUser to delete/recreate admin user for consistent state
- Fix TestListAllQueueItems_Admin to parse response as map with 'items' key
- Remove unused token variables from tests
- Update device_test.go with admin password hash constant

cmd/server/tests/device_test.go

@@ -451,6 +451,14 @@ func TestRegenerateDeviceToken_Forbidden(t *testing.T) {
 	})
 	assert.NoError(t, err)
 
+	// Clean up the second user after the test
+	defer func() {
+		user2, err := setup.DB.GetUserByEmail(ctx, "differentuser@example.com")
+		if err == nil {
+			setup.DB.DeleteUser(ctx, user2.ID)
+		}
+	}()
+
 	// Login as user 2
 	loginRequest := map[string]interface{}{
 		"login":    "differentuser@example.com",