Fix app storage "null" and "undefined" value handling

src/base/hooks/useStorage.tsx

@@ -52,7 +52,13 @@ function useStorage<T>(
             return initialState;
         }
 
-        return jsonSaveParse(storedValueRaw) ?? storedValueRaw;
+        const parsedValue = jsonSaveParse(storedValueRaw);
+
+        if (storedValueRaw === 'null' || storedValueRaw === 'undefined') {
+            return parsedValue;
+        }
+
+        return parsedValue ?? storedValueRaw;
     }, [storedValueRaw, key]);
 
     return [storedValue, setValue];

src/lib/storage/AppStorage.ts

@@ -17,7 +17,13 @@ export class Storage {
             return defaultValue;
         }
 
-        return jsonSaveParse(value) ?? (value as T);
+        const parsedValue = jsonSaveParse(value);
+
+        if (value === 'null' || value === 'undefined') {
+            return parsedValue;
+        }
+
+        return parsedValue ?? (value as T);
     }
 
     getItem(key: string): string | null {