Fix migration progress not updating and category flag mischeck (#2484)

- Fixed an issue where migration progress wasn't updated after a manual source search
- Fixed incorrect logic where the category migration flag was ignored due to checking the chapter flag instead

(cherry picked from commit 16b5317b90b3064d12aa38f687cc30110fd8cdb3)

app/src/main/java/mihon/domain/migration/usecases/MigrateMangaUseCase.kt

@@ -89,7 +89,7 @@ class MigrateMangaUseCase(
             }
 
             // Update categories
-            if (MigrationFlag.CHAPTER in flags) {
+            if (MigrationFlag.CATEGORY in flags) {
                 val categoryIds = getCategories.await(current.id).map { it.id }
                 setMangaCategories.await(target.id, categoryIds)
             }

app/src/main/java/mihon/feature/migration/list/MigrationListScreenModel.kt

@@ -251,6 +251,7 @@ class MigrationListScreenModel(
             } catch (_: Exception) {
             }
             migratingManga.searchResult.value = result.toSuccessSearchResult()
+            updateMigrationProgress()
         }
     }