test: add dashboard test and improve browser test coverage

- Add DashboardTest with tests for project/server visibility
- Add screenshots to existing browser tests for debugging
- Skip onboarding in dev mode for faster testing
- Update gitignore to exclude screenshot directories

bootstrap/helpers/shared.php

@@ -167,6 +167,10 @@ function currentTeam()
 
 function showBoarding(): bool
 {
+    if (isDev()) {
+        return false;
+    }
+
     if (Auth::user()?->isMember()) {
         return false;
     }