refactor(ui): update shared components and add ControlGroup, SidebarContainer

src/shared/ui/Slider/Slider.stories.svelte

@@ -75,24 +75,6 @@ let valueHigh = $state(75);
     {/snippet}
 </Story>
 
-<Story
-    name="Dark Mode"
-    args={{ orientation: 'horizontal', min: 0, max: 100, step: 1, value }}
-    parameters={{
-        backgrounds: {
-            default: 'dark',
-        },
-    }}
->
-    {#snippet template(args)}
-        <div class="p-8 bg-background">
-            <Slider {...args} />
-            <p class="mt-4 text-sm text-muted-foreground">Value: {args.value}</p>
-            <p class="mt-2 text-xs text-muted-foreground">Dark mode: track uses neutral-800</p>
-        </div>
-    {/snippet}
-</Story>
-
 <Story name="Interactive States" args={{ orientation: 'horizontal', min: 0, max: 100, step: 1, value: 50 }}>
     {#snippet template(args)}
         <div class="p-8 space-y-8">