fix(general): flash/createでPlayの公開範囲を指定できない問題の修正と編集画面の調整 (#13574)

* fix(backend): param `visibility` wasn't included in `flash/create`

* fix(frontend): tweak flash editor ui

* Update CHANGELOG.md

packages/misskey-js/src/autogen/types.ts

@@ -22686,6 +22686,11 @@ export type operations = {
           summary: string;
           script: string;
           permissions: string[];
+          /**
+           * @default public
+           * @enum {string}
+           */
+          visibility?: 'public' | 'private';
         };
       };
     };