fix: ensure sessions appear in list before tests proceed

- Add wait for session to appear in session list after creation
- Prevents race condition where tests navigate away before session syncs
- Should fix the remaining 2 failing tests (activity monitoring and terminal interaction)
- Import waitForSessionCard dynamically to avoid circular dependencies

Author: steipete

web/src/test/playwright/helpers/test-data-manager.helper.ts

@@ -79,6 +79,21 @@ export class TestSessionManager {
         );
       } else {
         console.log('Created web session which should appear in the session list');
+
+        // For web sessions, ensure it appears in the session list before returning
+        // This prevents race conditions when tests navigate away immediately
+        await this.page.goto('/', { waitUntil: 'domcontentloaded' });
+
+        // Import the helper function
+        const { waitForSessionCard } = await import('./test-optimization.helper');
+
+        try {
+          await waitForSessionCard(this.page, name, { timeout: 20000 });
+          console.log(`Session ${name} confirmed to be in session list`);
+        } catch (error) {
+          console.error(`Session ${name} did not appear in session list within timeout`);
+          // Continue anyway - the session was created successfully
+        }
       }
 
       return { sessionName: name, sessionId };