Fix uninstall status detection to use Install now link

Changed from using getByTestId('status-text') filter (which wasn't
finding the element) to checking for absence of "Install now" link.
This matches the same simple pattern used in isAppInstalled().

Verified with complete install/uninstall cycle:
- ✅ Tests pass with app not installed beforehand (performs installation)
- ✅ Tests pass with app already installed (skips installation)
- ✅ Uninstall correctly uses 3-dot menu pattern
- ✅ No warnings or errors

Author: mraible

e2e/src/pages/AppCatalogPage.ts

@@ -287,11 +287,12 @@ export class AppCatalogPage extends BasePage {
       // Search for and navigate to the app's catalog page
       await this.searchAndNavigateToApp(appName);
 
-      // Check if app is actually installed
-      const installedStatus = this.page.getByTestId('status-text').filter({ hasText: /^Installed$/i });
-      const isInstalled = await this.elementExists(installedStatus, 3000);
+      // Check if app is actually installed by looking for "Install now" link
+      // If "Install now" link exists, app is NOT installed
+      const installLink = this.page.getByRole('link', { name: 'Install now' });
+      const hasInstallLink = await this.elementExists(installLink, 3000);
 
-      if (!isInstalled) {
+      if (hasInstallLink) {
         this.logger.info(`App '${appName}' is already uninstalled`);
         return;
       }