feat(frontend): add MapLibre GL map components

Reusable Svelte map component library wrapping MapLibre GL JS: Map, MapMarker, MapControls, MapPopup, MapRoute, MapClusterLayer, MapArc, and supporting components. Features theme auto-detection, controlled/uncontrolled viewport, drag support, and context API. useMap hook provides reactive access. Integrated on contact page for salon location display.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

frontend/src/lib/components/ui/map/MarkerLabel.svelte

@@ -0,0 +1,27 @@
+<script lang="ts">
+	import { cn } from "$lib/utils.js";
+
+	interface Props {
+		children?: import("svelte").Snippet;
+		class?: string;
+		position?: "top" | "bottom";
+	}
+
+	let { children, class: className, position = "top" }: Props = $props();
+
+	const positionClasses = {
+		top: "bottom-full mb-1",
+		bottom: "top-full mt-1",
+	};
+</script>
+
+<div
+	class={cn(
+		"absolute left-1/2 -translate-x-1/2 whitespace-nowrap",
+		"text-foreground text-[10px] font-medium",
+		positionClasses[position],
+		className
+	)}
+>
+	{@render children?.()}
+</div>