test(18-01): add INT-03 Cancel closes modal without API call test

- Add test verifying Cancel button closes modal without making API call
- Fill description field before cancel to verify changes are discarded
- Use page.route() to track any PUT requests (should be none)
- Verify modal closes by checking privacy select visibility

jam-ui/test/session-settings/session-settings.spec.ts

@@ -85,4 +85,38 @@ test.describe('Session Settings Modal', () => {
     // Verify modal closes after save - check privacy select is no longer visible
     await expect(privacySelect).not.toBeVisible({ timeout: 5000 });
   });
+
+  test('INT-03: Cancel closes modal without API call', async ({ page }) => {
+    // Setup API tracking to detect any PUT calls
+    let apiCallMade = false;
+
+    await page.route('**/api/sessions/*', async (route, request) => {
+      if (request.method() === 'PUT') {
+        apiCallMade = true;
+      }
+      await route.continue();
+    });
+
+    // Open Settings modal
+    const settingsButton = page.locator('img[alt="Settings"]');
+    await settingsButton.click();
+
+    // Verify modal is open - use privacy select as the indicator
+    const privacySelect = page.locator('[data-testid="session-privacy"]');
+    await expect(privacySelect).toBeVisible({ timeout: 5000 });
+
+    // Optionally modify form values (to ensure cancel truly discards changes)
+    const descriptionTextarea = page.locator('textarea[name="description"]');
+    await descriptionTextarea.fill('This should be discarded');
+
+    // Click Cancel button
+    const cancelButton = page.locator('.modal-footer button:has-text("Cancel")');
+    await cancelButton.click();
+
+    // Verify modal closes - privacy select should no longer be visible
+    await expect(privacySelect).not.toBeVisible({ timeout: 5000 });
+
+    // Verify NO API call was made
+    expect(apiCallMade).toBe(false);
+  });
 });