Route Mode: Manage multiple named trips as "test cases" (still useful?)

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The issue title suggests adding a 'Route Mode' to manage multiple named trips as test cases within the LTN web application. Start by exploring the frontend codebase for existing route handling and UI components. Look for modules related to trip planning, state management, and user interface to understand how to integrate a test case management feature. Determine what 'done' looks like by checking if there are any existing specifications or mockups for this feature.

Written by the indexing model from the issue text.