Add Jellyfin library mapping support

Add support for Jellyfin library-to-category mappings used during import. Key changes:

- UI: ImporterView now lets users fetch Jellyfin libraries, configure per-library category (TV/Anime/Movies/Music/skip) and optional path segments, and persists mappings to API settings and localStorage.
- API/types: Add jellyfin_library_mappings to ApiSettingsItem/CreateSettingsInput and UserSettings (JSON string of LibraryMapping[]), and wire conversion helpers in src/api.ts and src/types.ts.
- Jellyfin importer: Introduce LibraryMapping type, fetchJellyfinLibraries, helper functions to resolve library from ParentId or Path (extractLibraryFromPath, findLibraryForItem), and update item conversion (movies/series/albums) to apply mappings and skip items marked 'skip'. Import flow now fetches libraries to build id->name map and passes mappings through to converters.

This enables category-aware imports and allows skipping libraries during Jellyfin imports.

src/components/CastDetailView.tsx

@@ -290,6 +290,11 @@ export default function CastDetailView({ person, relatedMedia }: CastDetailViewP
                       >
                         in {item.title}
                       </button>
+                      {item.category && (
+                        <Badge variant="secondary" className="text-[10px] font-bold mt-2 bg-muted text-muted-foreground border-none">
+                          {item.category}
+                        </Badge>
+                      )}
                     </div>
                   </div>
                 ))}
@@ -350,6 +355,11 @@ export default function CastDetailView({ person, relatedMedia }: CastDetailViewP
                         <Badge variant="outline" className="text-[10px] font-bold py-0 h-5 border-border">
                           {item.role}
                         </Badge>
+                        {item.category && (
+                          <Badge variant="secondary" className="text-[10px] font-bold py-0 h-5 bg-muted text-muted-foreground border-none">
+                            {item.category}
+                          </Badge>
+                        )}
                       </div>
                     </div>
                   </div>