fix(frontend): fix Storybook type errors (#13779)

* fix(frontend): fix Storybook type errors

* fix: `hasReduce` doesn't work in args

packages/frontend/src/components/MkSignupDialog.rules.stories.impl.ts

@@ -51,13 +51,16 @@ export const Empty = {
 		expect(buttons.at(-1)).toBeEnabled();
 	},
 	args: {
+		// @ts-expect-error serverRules is for test
 		serverRules: [],
 		tosUrl: null,
 	},
 	decorators: [
 		(_, context) => ({
 			setup() {
+				// @ts-expect-error serverRules is for test
 				instance.serverRules = context.args.serverRules;
+				// @ts-expect-error tosUrl is for test
 				instance.tosUrl = context.args.tosUrl;
 				onBeforeUnmount(() => {
 					// FIXME: 呼び出されない
@@ -76,6 +79,7 @@ export const ServerRulesOnly = {
 	...Empty,
 	args: {
 		...Empty.args,
+		// @ts-expect-error serverRules is for test
 		serverRules: [
 			'ルール',
 		],
@@ -85,6 +89,7 @@ export const TOSOnly = {
 	...Empty,
 	args: {
 		...Empty.args,
+		// @ts-expect-error tosUrl is for test
 		tosUrl: 'https://example.com/tos',
 	},
 } satisfies StoryObj<typeof MkSignupServerRules>;
@@ -92,6 +97,7 @@ export const ServerRulesAndTOS = {
 	...Empty,
 	args: {
 		...Empty.args,
+		// @ts-expect-error serverRules is for test
 		serverRules: ServerRulesOnly.args.serverRules,
 		tosUrl: TOSOnly.args.tosUrl,
 	},