test(e2e): update page objects for tabbed config page UI

Update ImportPage, SettingsPage, and plugin test helpers to navigate
to correct tabs after config page refactoring. Import/Export section
is now in Sync & Backup tab, plugins in Plugins tab.

Fixes 6 failing E2E tests:
- archive-import-persistence (3 tests)
- archive-subtasks (3 tests)

e2e/helpers/plugin-test.helpers.ts

@@ -97,7 +97,25 @@ export const waitForPluginManagementInit = async (
     // Wait a bit for the page to stabilize
     await page.waitForTimeout(500);
 
-    // Expand plugin section if collapsed and scroll it into view
+    // Navigate to the Plugins tab (4th tab, index 3)
+    // The plugin section is now inside the Plugins tab, not directly on the page
+    await page.evaluate(() => {
+      const pluginsTab = Array.from(
+        document.querySelectorAll('mat-tab-header .mat-mdc-tab'),
+      ).find((tab) => {
+        const icon = tab.querySelector('mat-icon');
+        return icon?.textContent?.trim() === 'extension';
+      });
+
+      if (pluginsTab) {
+        (pluginsTab as HTMLElement).click();
+      }
+    });
+
+    // Wait for tab content to load
+    await page.waitForTimeout(500);
+
+    // Now expand plugin section if collapsed and scroll it into view
     await page.evaluate(() => {
       const pluginSection = document.querySelector('.plugin-section');
       if (pluginSection) {

e2e/pages/import.page.ts

@@ -40,8 +40,34 @@ export class ImportPage extends BasePage {
     // Wait for page content to fully render
     await this.page.waitForTimeout(1000);
 
-    // The file-imex component is inside the collapsible "Import/Export" section
-    // First, find and expand the Import/Export section
+    // Dismiss any tour/welcome dialogs that might be blocking interactions
+    // Look for Shepherd tour dialog or Material dialogs
+    const tourDialog = this.page.locator('[data-shepherd-step-id="Welcome"]');
+    if (await tourDialog.isVisible().catch(() => false)) {
+      // Close button is in the tour dialog
+      const closeBtn = tourDialog.locator(
+        '.shepherd-cancel-icon, button.shepherd-cancel-icon',
+      );
+      if (await closeBtn.isVisible().catch(() => false)) {
+        await closeBtn.click();
+        await this.page.waitForTimeout(300);
+      } else {
+        // Try pressing Escape to dismiss
+        await this.page.keyboard.press('Escape');
+        await this.page.waitForTimeout(300);
+      }
+    }
+
+    // The file-imex component is now in the "Sync & Backup" tab (5th tab, index 4)
+    // Step 1: Click on the "Sync & Backup" tab to navigate to it
+    const syncBackupTab = this.page.locator(
+      'mat-tab-header .mat-mdc-tab:has(mat-icon:has-text("cloud_sync"))',
+    );
+    await syncBackupTab.waitFor({ state: 'visible', timeout: 10000 });
+    await syncBackupTab.click();
+    await this.page.waitForTimeout(500);
+
+    // Step 2: Within the tab, expand the "Import/Export" collapsible section
     const importExportSection = this.page.locator(
       'collapsible:has-text("Import/Export")',
     );
@@ -53,7 +79,7 @@ export class ImportPage extends BasePage {
     await collapsibleHeader.click();
     await this.page.waitForTimeout(500);
 
-    // Now the file-imex component should be visible
+    // Now the file-imex component should be visible in the active tab
     await this.importFromFileBtn.waitFor({ state: 'visible', timeout: 10000 });
   }
 

e2e/pages/settings.page.ts

@@ -64,9 +64,18 @@ export class SettingsPage extends BasePage {
 
   /**
    * Expand plugin section
+   * Note: The plugin section is now in the "Plugins" tab (4th tab, index 3)
    */
   async expandPluginSection(): Promise<void> {
-    await this.expandSection(PLUGIN_SECTION);
+    // The plugin section is now in the "Plugins" tab (4th tab, index 3)
+    // Click on the "Plugins" tab to navigate to it
+    const pluginsTab = this.page.locator(
+      'mat-tab-header .mat-mdc-tab:has(mat-icon:has-text("extension"))',
+    );
+    await pluginsTab.waitFor({ state: 'visible', timeout: 10000 });
+    await pluginsTab.click();
+    await this.page.waitForTimeout(500);
+
     // Ensure plugin management component and at least file input are visible
     await this.pluginManagement.waitFor({ state: 'visible', timeout: 5000 });
     await this.page