Stabilize auth flow and profile images

app/test/directory/directory_repository_test.dart

@@ -0,0 +1,36 @@
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:tdc114plus/src/features/directory/data/directory_repository.dart';
+import 'package:tdc114plus/src/features/directory/domain/employee.dart';
+
+void main() {
+  test('DirectoryQuery maps all tenant filter to nullable API parameters', () {
+    const query = DirectoryQuery(query: '  김하늘  ', tenantSlug: 'all');
+
+    expect(query.apiQuery, '김하늘');
+    expect(query.apiTenantSlug, isNull);
+  });
+
+  test('DirectoryQuery keeps selected tenant slug for API requests', () {
+    const query = DirectoryQuery(query: '', tenantSlug: 'hanmac');
+
+    expect(query.apiQuery, isNull);
+    expect(query.apiTenantSlug, 'hanmac');
+  });
+
+  test('DirectoryRepository now focuses on employee lists only', () {
+    const employees = [
+      Employee(
+        id: 'user-001',
+        name: '김하늘',
+        phoneNumber: '+821012345678',
+        tenantId: 'tenant-hanmac',
+        tenantName: '한맥',
+        tenantSlug: 'hanmac',
+      ),
+    ];
+
+    expect(employees.single.name, '김하늘');
+    expect(employees.single.tenantSlug, 'hanmac');
+  });
+}