fix(frontend): Fix lint and type errors in test files

- Remove unused imports (fireEvent, IssueStatus) in issue component tests
- Add E2E global type declarations for __TEST_AUTH_STORE__
- Fix toHaveAccessibleName assertion with regex pattern

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/e2e/global.d.ts

@@ -0,0 +1,18 @@
+/**
+ * Global type declarations for E2E tests
+ */
+
+declare global {
+  interface Window {
+    __TEST_AUTH_STORE__?: {
+      getState: () => {
+        isAuthenticated: boolean;
+        user: { id: string; email: string; is_superuser: boolean } | null;
+        accessToken: string | null;
+        refreshToken: string | null;
+      };
+    };
+  }
+}
+
+export {};

frontend/e2e/issues.spec.ts

@@ -238,7 +238,7 @@ test.describe('Issue Management', () => {
       expect(count).toBeGreaterThan(0);
 
       // First checkbox should have accessible label
-      await expect(checkboxes.first()).toHaveAccessibleName();
+      await expect(checkboxes.first()).toHaveAccessibleName(/.+/);
     });
 
     test('issue detail has proper radiogroup for status', async ({ page }) => {

frontend/tests/features/issues/components/IssueFilters.test.tsx

@@ -2,7 +2,7 @@
  * IssueFilters Component Tests
  */
 
-import { render, screen, fireEvent } from '@testing-library/react';
+import { render, screen } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import { IssueFilters } from '@/features/issues/components/IssueFilters';
 import type { IssueFilters as IssueFiltersType } from '@/features/issues/types';

frontend/tests/features/issues/components/IssueTable.test.tsx

@@ -2,7 +2,7 @@
  * IssueTable Component Tests
  */
 
-import { render, screen, fireEvent } from '@testing-library/react';
+import { render, screen } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import { IssueTable } from '@/features/issues/components/IssueTable';
 import type { IssueSummary, IssueSort } from '@/features/issues/types';

frontend/tests/features/issues/components/StatusWorkflow.test.tsx

@@ -5,7 +5,6 @@
 import { render, screen } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import { StatusWorkflow } from '@/features/issues/components/StatusWorkflow';
-import type { IssueStatus } from '@/features/issues/types';
 
 describe('StatusWorkflow', () => {
   const mockOnStatusChange = jest.fn();