feat: implement splash screen handling in navigation and interactions

- Added a new function `waitForSplashScreenToDisappear` to manage splash screen visibility, ensuring it does not block user interactions.
- Integrated splash screen checks in various navigation functions and interaction methods to enhance user experience by waiting for the splash screen to disappear before proceeding.
- Updated test setup to disable the splash screen during tests for consistent testing behavior.

apps/ui/tests/utils/project/fixtures.ts

@@ -110,6 +110,9 @@ export async function setupProjectWithFixture(
       version: 0, // setup-store.ts doesn't specify a version, so zustand defaults to 0
     };
     localStorage.setItem('automaker-setup', JSON.stringify(setupState));
+
+    // Disable splash screen in tests
+    sessionStorage.setItem('automaker-splash-shown', 'true');
   }, projectPath);
 }