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/scroll-area.tsx

@@ -1,58 +0,0 @@
-"use client";
-
-import * as ScrollAreaPrimitive from "@radix-ui/react-scroll-area";
-import type * as React from "react";
-
-import { cn } from "./utils";
-
-function ScrollArea({
-	className,
-	children,
-	...props
-}: React.ComponentProps<typeof ScrollAreaPrimitive.Root>) {
-	return (
-		<ScrollAreaPrimitive.Root
-			data-slot="scroll-area"
-			className={cn("relative", className)}
-			{...props}
-		>
-			<ScrollAreaPrimitive.Viewport
-				data-slot="scroll-area-viewport"
-				className="focus-visible:ring-ring/50 size-full rounded-[inherit] transition-[color,box-shadow] outline-none focus-visible:ring-[3px] focus-visible:outline-1"
-			>
-				{children}
-			</ScrollAreaPrimitive.Viewport>
-			<ScrollBar />
-			<ScrollAreaPrimitive.Corner />
-		</ScrollAreaPrimitive.Root>
-	);
-}
-
-function ScrollBar({
-	className,
-	orientation = "vertical",
-	...props
-}: React.ComponentProps<typeof ScrollAreaPrimitive.ScrollAreaScrollbar>) {
-	return (
-		<ScrollAreaPrimitive.ScrollAreaScrollbar
-			data-slot="scroll-area-scrollbar"
-			orientation={orientation}
-			className={cn(
-				"flex touch-none p-px transition-colors select-none",
-				orientation === "vertical" &&
-					"h-full w-2.5 border-l border-l-transparent",
-				orientation === "horizontal" &&
-					"h-2.5 flex-col border-t border-t-transparent",
-				className,
-			)}
-			{...props}
-		>
-			<ScrollAreaPrimitive.ScrollAreaThumb
-				data-slot="scroll-area-thumb"
-				className="bg-border relative flex-1 rounded-full"
-			/>
-		</ScrollAreaPrimitive.ScrollAreaScrollbar>
-	);
-}
-
-export { ScrollArea, ScrollBar };