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/collapsible.tsx

@@ -1,33 +0,0 @@
-"use client";
-
-import * as CollapsiblePrimitive from "@radix-ui/react-collapsible";
-
-function Collapsible({
-	...props
-}: React.ComponentProps<typeof CollapsiblePrimitive.Root>) {
-	return <CollapsiblePrimitive.Root data-slot="collapsible" {...props} />;
-}
-
-function CollapsibleTrigger({
-	...props
-}: React.ComponentProps<typeof CollapsiblePrimitive.CollapsibleTrigger>) {
-	return (
-		<CollapsiblePrimitive.CollapsibleTrigger
-			data-slot="collapsible-trigger"
-			{...props}
-		/>
-	);
-}
-
-function CollapsibleContent({
-	...props
-}: React.ComponentProps<typeof CollapsiblePrimitive.CollapsibleContent>) {
-	return (
-		<CollapsiblePrimitive.CollapsibleContent
-			data-slot="collapsible-content"
-			{...props}
-		/>
-	);
-}
-
-export { Collapsible, CollapsibleTrigger, CollapsibleContent };