fix(collections): preserve catalog genre filter on View All

The genre filter applied to a collection folder catalog was dropped when
opening View All. FolderDetailRepository.getCatalogSectionsForRows() built
HomeCatalogSection without carrying the tab's genre, and onCatalogClick did
not forward it to CatalogRoute, so the full-catalog screen loaded unfiltered.

Add a genre field to HomeCatalogSection, pass tab.genre when mapping folder
tabs to sections, and forward section.genre into CatalogRoute so the selected
genre filter is preserved through View All.

Fixes #1264

composeApp/src/commonMain/kotlin/com/nuvio/app/App.kt

@@ -1191,6 +1191,7 @@ private fun MainAppContent(
                     type = section.type,
                     catalogId = section.catalogId,
                     supportsPagination = section.supportsPagination,
+                    genre = section.genre,
                 ),
             )
         }

composeApp/src/commonMain/kotlin/com/nuvio/app/features/collection/FolderDetailRepository.kt

@@ -421,6 +421,7 @@ object FolderDetailRepository {
                 items = tab.items,
                 availableItemCount = tab.items.size,
                 supportsPagination = tab.supportsPagination,
+                genre = tab.genre,
             )
         }
     }

composeApp/src/commonMain/kotlin/com/nuvio/app/features/home/HomeModels.kt

@@ -39,6 +39,7 @@ data class HomeCatalogSection(
     val items: List<MetaPreview>,
     val availableItemCount: Int = items.size,
     val supportsPagination: Boolean = false,
+    val genre: String? = null,
 )
 
 fun HomeCatalogSection.canOpenCatalog(previewLimit: Int): Boolean =