use shorter store syntax

src/components/widgets/Settings.tsx

@@ -35,20 +35,13 @@ export function Settings(props: SettingsProps) {
             <Flex direction="column" gap=".5rem">
               <Checkbox
                 checked={appSettings.showLocations}
-                onChange={(e) =>
-                  setAppSettings((prev) => ({ ...prev, showLocations: (e.target as any).checked }))
-                }
+                onChange={(e) => setAppSettings({ showLocations: (e.target as any).checked })}
               >
                 Show locations
               </Checkbox>
               <Checkbox
                 checked={appSettings.useSavedBackgrounds}
-                onChange={(e) =>
-                  setAppSettings((prev) => ({
-                    ...prev,
-                    useSavedBackgrounds: (e.target as any).checked,
-                  }))
-                }
+                onChange={(e) => setAppSettings({ useSavedBackgrounds: (e.target as any).checked })}
               >
                 Use favorited backgrounds
               </Checkbox>

src/state/settings-provider.tsx

@@ -1,4 +1,4 @@
-import { Accessor, JSX, createContext, createMemo, useContext } from 'solid-js';
+import { Accessor, JSX, createContext, useContext } from 'solid-js';
 import { SetStoreFunction } from 'solid-js/store';
 import { sample } from '~/lib/array';
 import { createLocalStore } from '~/lib/create-local-store';