fix(frontend): initialize autoSaveRef with explicit undefined for TypeScript compatibility

junzero741 · claude · junzero741 · commit b3ea4f8eb7ac · 2026-03-18T12:40:26.000+09:00
Co-Authored-By: Claude Sonnet 4.6 &lt;noreply@anthropic.com&gt;
diff --git a/apps/frontend/src/app/page.tsx b/apps/frontend/src/app/page.tsx
@@ -102,7 +102,7 @@ export default function Page() {
     );
   }
 
-  const autoSaveRef = useRef<() => Promise<void>>();
+  const autoSaveRef = useRef<(() => Promise<void>) | undefined>(undefined);
   autoSaveRef.current = async () => {
     if (!shouldAutoSave(title, content)) return;
     const now = new Date().toISOString();

Original file line number	Diff line number	Diff line change
`@@ -102,7 +102,7 @@ export default function Page() {`
`102`	`102`	`);`
`103`	`103`	`}`
`104`	`104`
`105`		`- const autoSaveRef = useRef<() => Promise<void>>();`
	`105`	`+ const autoSaveRef = useRef<(() => Promise<void>) \| undefined>(undefined);`
`106`	`106`	`autoSaveRef.current = async () => {`
`107`	`107`	`if (!shouldAutoSave(title, content)) return;`
`108`	`108`	`const now = new Date().toISOString();`