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/tabs.tsx

@@ -1,66 +0,0 @@
-"use client";
-
-import * as TabsPrimitive from "@radix-ui/react-tabs";
-import type * as React from "react";
-
-import { cn } from "./utils";
-
-function Tabs({
-	className,
-	...props
-}: React.ComponentProps<typeof TabsPrimitive.Root>) {
-	return (
-		<TabsPrimitive.Root
-			data-slot="tabs"
-			className={cn("flex flex-col gap-2", className)}
-			{...props}
-		/>
-	);
-}
-
-function TabsList({
-	className,
-	...props
-}: React.ComponentProps<typeof TabsPrimitive.List>) {
-	return (
-		<TabsPrimitive.List
-			data-slot="tabs-list"
-			className={cn(
-				"bg-muted text-muted-foreground inline-flex h-9 w-fit items-center justify-center rounded-xl p-[3px] flex",
-				className,
-			)}
-			{...props}
-		/>
-	);
-}
-
-function TabsTrigger({
-	className,
-	...props
-}: React.ComponentProps<typeof TabsPrimitive.Trigger>) {
-	return (
-		<TabsPrimitive.Trigger
-			data-slot="tabs-trigger"
-			className={cn(
-				"data-[state=active]:bg-card dark:data-[state=active]:text-foreground focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:outline-ring dark:data-[state=active]:border-input dark:data-[state=active]:bg-input/30 text-foreground dark:text-muted-foreground inline-flex h-[calc(100%-1px)] flex-1 items-center justify-center gap-1.5 rounded-xl border border-transparent px-2 py-1 text-sm font-medium whitespace-nowrap transition-[color,box-shadow] focus-visible:ring-[3px] focus-visible:outline-1 disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
-				className,
-			)}
-			{...props}
-		/>
-	);
-}
-
-function TabsContent({
-	className,
-	...props
-}: React.ComponentProps<typeof TabsPrimitive.Content>) {
-	return (
-		<TabsPrimitive.Content
-			data-slot="tabs-content"
-			className={cn("flex-1 outline-none", className)}
-			{...props}
-		/>
-	);
-}
-
-export { Tabs, TabsList, TabsTrigger, TabsContent };