calculation tool "Geldwerter Vorteil"

[therobrob]

[MoritzWeber0]

• Add beta label to mark it as "may change in the future" at the top
• Move taxation calculator to separate page, specific for DB, remove dropdown menu
• Add link in DB validity.yaml
• Isolate JS / CSS from rest of the application, move HTML to subfolder
• Feedback to contact formula
• Add a comment to the file that it's vibe coded / AI generated

[MoritzWeber0]

During lunch I had another idea how we could move forward with the topic. Since the implementation in #814 is pretty independent from the rest of the application, I have this proposal:

• We move the implementation to a separate repository in the DB internal source control system.
• The separate repository has it's own basic Hugo instance and an independent lifecycle. The implementation doesn't have to be considered for refactorings of the main repository, which removes complexity.
• Changes to the separate repository can be done without the strict review process that we have in the main repository. Bug fixes, enhancements and overall changes can be done more rapidly with AI. No need for detailed reviews as the impact is lower.
• We can clearly mark the overall implementation as prototype. In case we want to reimplement it in the future or have to do major changes, we could easily start from scratch.
• The separate page is hosted on a subdomain and embedded via iframe on fipguide.org, invisible for the user.
• The language and theme can be passed via queryParam or the postMessage API
• The JS / CSS is clearly isolated from the main page, so we avoid issues with AI messing up other parts of the application.
• Logos can be fetched from https://www.fipguide.org/images/logos/{operator}.svg

What do you think of the idea? @lenderom @therobrob