feat(Slider): create reusable slider component - a styled version of bits-ui slider

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

@@ -0,0 +1,51 @@
+<script module>
+import { defineMeta } from '@storybook/addon-svelte-csf';
+import Slider from './Slider.svelte';
+
+const { Story } = defineMeta({
+    title: 'Shared/Slider',
+    component: Slider,
+    tags: ['autodocs'],
+    parameters: {
+        docs: {
+            description: {
+                component: 'Styled bits-ui slider component for selecting a value within a range.',
+            },
+            story: { inline: false }, // Render stories in iframe for state isolation
+        },
+    },
+    argTypes: {
+        value: {
+            control: 'number',
+            description: 'Current value (two-way bindable)',
+        },
+        min: {
+            control: 'number',
+            description: 'Minimum value',
+        },
+        max: {
+            control: 'number',
+            description: 'Maximum value',
+        },
+        step: {
+            control: 'number',
+            description: 'Step size for value increments',
+        },
+    },
+});
+</script>
+
+<script lang="ts">
+let minValue = 0;
+let maxValue = 100;
+let stepValue = 1;
+let value = $state(50);
+</script>
+
+<Story name="Horizontal" args={{ orientation: 'horizontal', min: minValue, max: maxValue, step: stepValue, value }}>
+    <Slider bind:value min={minValue} max={maxValue} step={stepValue} />
+</Story>
+
+<Story name="Vertical" args={{ orientation: 'vertical', min: minValue, max: maxValue, step: stepValue, value }}>
+    <Slider bind:value min={minValue} max={maxValue} step={stepValue} orientation="vertical" />
+</Story>

src/shared/ui/Slider/Slider.svelte

@@ -0,0 +1,105 @@
+<!--
+    Component: Slider
+    Styled bits-ui slider component with single value.
+-->
+<script lang="ts">
+import { cn } from '$shared/shadcn/utils/shadcn-utils';
+import {
+    Slider,
+    type SliderRootProps,
+} from 'bits-ui';
+
+type Props = Omit<SliderRootProps, 'type' | 'onValueChange' | 'onValueCommit'> & {
+    /**
+     * Slider value, numeric.
+     */
+    value: number;
+    /**
+     * A callback function called when the value changes.
+     * @param newValue - number
+     */
+    onValueChange?: (newValue: number) => void;
+    /**
+     * A callback function called when the user stops dragging the thumb and the value is committed.
+     * @param newValue - number
+     */
+    onValueCommit?: (newValue: number) => void;
+};
+
+let { value = $bindable(), orientation = 'horizontal', class: className, ...rest }: Props = $props();
+</script>
+
+<Slider.Root
+    bind:value={value}
+    class={cn(
+        'relative flex h-full w-6 touch-none select-none items-center justify-center',
+        orientation === 'horizontal' ? 'w-48 h-6' : 'w-6 h-48',
+        className,
+    )}
+    type="single"
+    {orientation}
+    {...rest}
+>
+    {#snippet children(props)}
+        <span
+            {...props}
+            class={cn('relative bg-gray-200 rounded-full', orientation === 'horizontal' ? 'w-full h-px' : 'h-full w-px')}
+        >
+            <!-- Filled range with NO transition -->
+            <Slider.Range
+                class={cn('absolute bg-gray-900 rounded-full', orientation === 'horizontal' ? 'h-full' : 'w-full')}
+            />
+
+            <Slider.Thumb
+                index={0}
+                class={cn(
+                    'group/thumb relative block',
+                    orientation === 'horizontal' ? '-top-1 w-2 h-2.25' : '-left-1 h-2 w-2.25',
+                    'rounded-sm',
+                    'bg-gray-900',
+                    // Glow shadow
+                    'shadow-[0_0_6px_rgba(0,0,0,0.4)]',
+                    // Smooth transitions only for size/position
+                    'duration-200 ease-out',
+                    orientation === 'horizontal' ? 'transition-[height,top,left,box-shadow]' : 'transition-[width,top,left,box-shadow]',
+                    // Hover: bigger glow
+                    'hover:shadow-[0_0_10px_rgba(0,0,0,0.5)]',
+                    orientation === 'horizontal' ? 'hover:h-3 hover:-top-[5.5px]' : 'hover:w-3 hover:-left-[5.5px]',
+                    // Active: smaller glow
+                    'active:shadow-[0_0_4px_rgba(0,0,0,0.3)]',
+                    orientation === 'horizontal' ? 'active:h-2.5 active:-top-[4.5px]' : 'active:w-2.5 active:-left-[4.5px]',
+                    'focus:outline-none',
+                    'cursor-grab active:cursor-grabbing',
+                )}
+            >
+                <!-- Soft glow on hover -->
+                <div
+                    class="
+                        absolute inset-0 rounded-sm
+                        bg-white/20
+                        opacity-0 group-hover/thumb:opacity-100
+                        transition-opacity duration-200
+                    "
+                >
+                </div>
+
+                <!-- Value label -->
+                <span
+                    class={cn(
+                        'absolute',
+                        orientation === 'horizontal' ? '-top-8 left-1/2 -translate-x-1/2' : 'left-5 top-1/2 -translate-y-1/2',
+                        'px-1.5 py-0.5 rounded-md',
+                        'bg-gray-900/90 backdrop-blur-sm',
+                        'font-mono text-[0.625rem] font-medium text-white ',
+                        'opacity-0 group-hover/thumb:opacity-100',
+                        'transition-all duration-300',
+                        'pointer-events-none',
+                        'shadow-sm',
+                    )}
+                >
+                    {value}
+                </span>
+            </Slider.Thumb>
+        </span>
+    {/snippet}
+</Slider.Root>

src/shared/ui/index.ts

@@ -12,4 +12,5 @@ export { default as Logo } from './Logo/Logo.svelte';
 export { default as SearchBar } from './SearchBar/SearchBar.svelte';
 export { default as Section } from './Section/Section.svelte';
 export { default as Skeleton } from './Skeleton/Skeleton.svelte';
+export { default as Slider } from './Slider/Slider.svelte';
 export { default as VirtualList } from './VirtualList/VirtualList.svelte';