Feature request: official Dart server-side SDK #84

Is your feature request related to a problem?

We run a production backend on server-side Dart (Firebase Cloud Functions, Dart AOT runtime) alongside our Flutter app. Today the only way to call the DeepL API from Dart is a hand-rolled HTTP client over the REST API — no typed models, no maintained auth/retry/pagination helpers, and drift whenever the API changes.

Describe the solution you'd like

An official (or officially-supported) Dart package published on pub.dev, equivalent in scope to your Node.js SDK. Dart is now a first-class server language (AOT Cloud Functions, Cloud Run, Dart Frog, Serverpod), and the Flutter ecosystem makes one language across mobile + backend valuable.

Alternatives considered

• Hand-written REST client over package:http (current approach — high maintenance).
• Keeping these integrations in a separate Node.js service purely because no Dart SDK exists.

Additional context

Our team maintains both a Flutter app and a Dart backend; a Dart SDK would let us consolidate. Happy to help test and give feedback.