feat: Implement theme toggling and enhance dashboard component theming

This commit introduces a theme toggle functionality in the application header
and improves the visual consistency of dashboard components across different
color schemes.

- Added light/dark mode toggle to  using Mantine's .
- Ensured all  components in  have visible borders in both light and dark modes by adding the  prop.
- Made  colors in  theme-aware, dynamically adjusting their background color based on the active color scheme.

Additionally, this commit includes a large refactoring operation, moving various
component files from  to  and updating
their references.

src/components/ui/slider.tsx

@@ -1,58 +0,0 @@
-"use client";
-
-import * as SliderPrimitive from "@radix-ui/react-slider";
-import * as React from "react";
-import { ulid } from "ulid";
-
-import { cn } from "./utils"; // Assuming cn is used and imported from ./utils
-
-const Slider = React.forwardRef<
-	React.ElementRef<typeof SliderPrimitive.Root>,
-	React.ComponentPropsWithoutRef<typeof SliderPrimitive.Root>
->(
-	(
-		{ className, children, value, defaultValue, min = 0, max = 100, ...props },
-		ref,
-	) => {
-		const _values = React.useMemo(
-			() =>
-				Array.isArray(value)
-					? value
-					: Array.isArray(defaultValue)
-						? defaultValue
-						: [min, max],
-			[value, defaultValue, min, max],
-		);
-
-		return (
-			<SliderPrimitive.Root
-				ref={ref}
-				defaultValue={defaultValue}
-				value={value}
-				min={min}
-				max={max}
-				className={cn(
-					"relative flex w-full touch-none items-center select-none data-[disabled]:opacity-50",
-					"data-[orientation=horizontal]:h-4 data-[orientation=horizontal]:py-2",
-					"data-[orientation=vertical]:h-full data-[orientation=vertical]:w-4 data-[orientation=vertical]:px-2 data-[orientation=vertical]:flex-col",
-					className,
-				)}
-				{...props}
-			>
-				<SliderPrimitive.Track className="relative h-2 w-full grow overflow-hidden rounded-full bg-muted">
-					<SliderPrimitive.Range className="absolute h-full bg-primary" />
-				</SliderPrimitive.Track>
-				{_values.map((_val, _index) => (
-					<SliderPrimitive.Thumb
-						key={ulid()} // Using ulid for unique keys
-						className="block size-4 shrink-0 rounded-full border border-primary bg-background shadow-sm transition-[color,box-shadow] hover:ring-4 focus-visible:ring-4 focus-visible:outline-none disabled:pointer-events-none disabled:opacity-50"
-					/>
-				))}
-				{children}
-			</SliderPrimitive.Root>
-		);
-	},
-);
-Slider.displayName = SliderPrimitive.Root.displayName;
-
-export { Slider };