feat: Rewrite accountMixin to a composable (#9914)

app/javascript/dashboard/composables/spec/useAccount.spec.js

@@ -0,0 +1,37 @@
+import { ref } from 'vue';
+import { describe, it, expect, vi } from 'vitest';
+import { useAccount } from '../useAccount';
+import { useStoreGetters } from 'dashboard/composables/store';
+
+vi.mock('dashboard/composables/store');
+
+describe('useAccount', () => {
+  beforeEach(() => {
+    useStoreGetters.mockReturnValue({
+      getCurrentAccountId: ref(123),
+    });
+  });
+
+  it('returns accountId as a computed property', () => {
+    const { accountId } = useAccount();
+    expect(accountId.value).toBe(123);
+  });
+
+  it('generates account-scoped URLs correctly', () => {
+    const { accountScopedUrl } = useAccount();
+    const result = accountScopedUrl('settings/inbox/new');
+    expect(result).toBe('/app/accounts/123/settings/inbox/new');
+  });
+
+  it('handles URLs with leading slash', () => {
+    const { accountScopedUrl } = useAccount();
+    const result = accountScopedUrl('users');
+    expect(result).toBe('/app/accounts/123/users');
+  });
+
+  it('handles empty URL', () => {
+    const { accountScopedUrl } = useAccount();
+    const result = accountScopedUrl('');
+    expect(result).toBe('/app/accounts/123/');
+  });
+});