refactor: simplify state and type mapping functions

* refactor: simplify state and type mapping functions

* fix: add error handling to state and type mapping functions

---------

Co-authored-by: Davide Marcoli <69892203+davidemarcoli@users.noreply.github.com>

src/routes/browse/+page.svelte

@@ -105,11 +105,20 @@
 	}
 
 	function mapSelectedStates(selectedStates: Selected<string>[]) {
-		return selectedStates.map((selectedState) => selectedState.value as keyof typeof states);
+		try {
+			return [...(selectedStates?.values() ?? [])].map((v) => v?.value as keyof typeof states);
+		} catch (error) {
+			console.error('Error mapping selected states:', error);
+			return [];
+		}
 	}
-
 	function mapSelectedTypes(selectedTypes: Selected<string>[]) {
-		return selectedTypes.map((selectedType) => selectedType.value as keyof typeof types);
+		try {
+			return [...(selectedTypes?.values() ?? [])].map((v) => v?.value as keyof typeof types);
+		} catch (error) {
+			console.error('Error mapping selected types:', error);
+			return [];
+		}
 	}
 </script>