Resolve Arr metadata before adding media

backend/app/clients/radarr.py

@@ -9,6 +9,10 @@ class RadarrClient(ApiClient):
     async def get_movie_by_tmdb_id(self, tmdb_id: int) -> Optional[Dict[str, Any]]:
         return await self.get("/api/v3/movie", params={"tmdbId": tmdb_id})
 
+    async def lookup_movie_by_tmdb_id(self, tmdb_id: int) -> Optional[Dict[str, Any]]:
+        result = await self.get("/api/v3/movie/lookup/tmdb", params={"tmdbId": tmdb_id})
+        return result if isinstance(result, dict) else None
+
     async def get_movie(self, movie_id: int) -> Optional[Dict[str, Any]]:
         return await self.get(f"/api/v3/movie/{movie_id}")
 
@@ -42,9 +46,15 @@ class RadarrClient(ApiClient):
         root_folder: str,
         monitored: bool = True,
         search_for_movie: bool = True,
+        title: Optional[str] = None,
     ) -> Optional[Dict[str, Any]]:
+        lookup = await self.lookup_movie_by_tmdb_id(tmdb_id)
+        resolved_title = str((lookup or {}).get("title") or "").strip() or (title or "").strip()
+        if not resolved_title:
+            raise ValueError("Radarr could not resolve a title for this TMDB ID")
         payload = {
             "tmdbId": tmdb_id,
+            "title": resolved_title,
             "qualityProfileId": quality_profile_id,
             "rootFolderPath": root_folder,
             "monitored": monitored,