From 705815a8fcdb1679a54adfe9f76e098f6b4e31d0 Mon Sep 17 00:00:00 2001
From: Jan-Henrik Bruhn <jan-henrik.bruhn@offis.de>
Date: Sat, 27 Dec 2025 11:59:42 +0100
Subject: [PATCH] fix: Provide initial value to useRef in usePrevious hook
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TypeScript requires an initial value argument when calling useRef.
Changed useRef<T>() to useRef<T | undefined>(undefined) to fix
build error and properly type the ref for the first render.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
---
 src/hooks/usePrevious.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hooks/usePrevious.ts b/src/hooks/usePrevious.ts
index 26b8021..f081f95 100644
--- a/src/hooks/usePrevious.ts
+++ b/src/hooks/usePrevious.ts
@@ -15,7 +15,7 @@
 import { useEffect, useRef } from "react";
 
 export function usePrevious<T>(value: T): T | undefined {
-  const ref = useRef<T>();
+  const ref = useRef<T | undefined>(undefined);
 
   useEffect(() => {
     ref.current = value;