* refactor: update AppTitleBar and SidebarHeader components to use MenuDropdown and ActionIcon for improved UI consistency
* refactor: update button locators in tests to use data-testid for consistency and improved readability
* feat: Enhance EnvironmentVariables component with read-only support for non-string values
* feat: minor refactor and cleanup worker app state
* fix: playwright test flow
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Co-authored-by: Bijin Bruno <bijin@usebruno.com>