feat(2.0): DELETE /api/models/{id} (Eintrag + Gruppen-Mitgliedschaft entfernen)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/routers/models.py

@@ -124,6 +124,13 @@ def cancel(job_id: str) -> dict:
     return {"ok": jobengine.cancel_job(job_id)}
 
 
+@router.delete("/models/{model_id}")
+def delete(model_id: str) -> dict:
+    if not llamaswap.delete_model(model_id):
+        raise HTTPException(404, "Modell nicht gefunden")
+    return {"ok": True}
+
+
 @router.get("/groups")
 def groups() -> dict:
     return {"groups": llamaswap.list_groups()}