From f0f78a6126edd82c5fd6f749e8f3e83ccaeefd2c Mon Sep 17 00:00:00 2001
From: Christian Vidal Wolf <christianvidalwolf@gmail.com>
Date: Fri, 24 Apr 2026 20:31:32 +0200
Subject: [PATCH] fix: resolve Uncaught TypeError: Cannot read properties of
 undefined (reading 'key') by ensuring usePersistentState handles functional
 updates safely

---
 src/contexts/FilterContext.tsx | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/contexts/FilterContext.tsx b/src/contexts/FilterContext.tsx
index 6ba166e..a54b2bd 100644
--- a/src/contexts/FilterContext.tsx
+++ b/src/contexts/FilterContext.tsx
@@ -33,8 +33,11 @@ export function usePersistentState<T>(key: string, defaultValue: T): [T, (value:
   const state = context.states[key] !== undefined ? context.states[key] : defaultValue;
   
   const setState = useCallback((value: T | ((prev: T) => T)) => {
-    context.setState(key, value);
-  }, [context, key]);
+    context.setState(key, (current: any) => {
+      const actualCurrent = current !== undefined ? current : defaultValue;
+      return typeof value === 'function' ? (value as any)(actualCurrent) : value;
+    });
+  }, [context, key, defaultValue]);
 
   return [state, setState];
 }