feat(hikes): hide on-map attribution control, add swisstopo credit

Drop Leaflet's bottom-right attribution control on both the overview and
detail maps for a cleaner frame. The swisstopo tile licence still requires
their credit, so keep it on the page: the detail page already shows it in
the meta footer, and the overview now gets a tiny "Kartendaten © swisstopo"
line at the bottom of the listing.

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "homepage",
-	"version": "1.79.0",
+	"version": "1.79.1",
 	"private": true,
 	"type": "module",
 	"scripts": {

src/lib/components/hikes/HikeMap.svelte

@@ -140,7 +140,10 @@
 			const latLngs: [number, number][] = track.map((p) => [p[1], p[0]]);
 
 			const map = L.map(node, {
-				attributionControl: true,
+				// On-map attribution control removed for a cleaner frame; the
+				// required swisstopo credit is repeated in the page's meta footer
+				// ("Kartendaten © swisstopo").
+				attributionControl: false,
 				zoomControl: true,
 				preferCanvas: true
 			});

src/lib/components/hikes/HikesOverviewMap.svelte

@@ -103,7 +103,10 @@
 			// hovered/clicked from a comfortable margin instead of demanding a
 			// pixel-perfect click on the 4 px line.
 			const map = L.map(node, {
-				attributionControl: true,
+				// On-map attribution control removed for a cleaner frame.
+				// NOTE: swisstopo's tile licence requires their credit to appear;
+				// the /hikes page currently shows no other swisstopo attribution.
+				attributionControl: false,
 				zoomControl: true,
 				preferCanvas: true,
 				renderer: L.canvas({ tolerance: 12 })

src/routes/hikes/+page.svelte

@@ -229,6 +229,16 @@
 				{/each}
 			</ul>
 		{/if}
+
+		<!-- Tiny swisstopo credit. The map's own attribution control is hidden
+		     for a cleaner frame, but their tile licence still requires the
+		     credit to appear somewhere on the page. -->
+		<footer class="map-credit">
+			Kartendaten &copy;
+			<a href="https://www.swisstopo.admin.ch/" target="_blank" rel="noopener noreferrer">
+				swisstopo
+			</a>
+		</footer>
 	</div>
 </section>
 
@@ -335,6 +345,27 @@
 		padding: 3rem 1rem;
 	}
 
+	/* Tiny, muted map-licence credit at the very bottom of the listing. */
+	.map-credit {
+		margin-top: 2.5rem;
+		padding: 0 1rem;
+		text-align: center;
+		font-size: 0.72rem;
+		color: var(--color-text-tertiary);
+	}
+
+	.map-credit a {
+		color: inherit;
+		text-decoration: underline;
+		text-decoration-color: color-mix(in oklab, currentColor 35%, transparent);
+		text-underline-offset: 0.18em;
+		transition: color var(--transition-fast);
+	}
+
+	.map-credit a:hover {
+		color: var(--color-primary);
+	}
+
 	@media (max-width: 560px) {
 		.grid {
 			grid-template-columns: 1fr;