fix: deduplicate search results to prevent duplicate key error

The API may return the same item across multiple pages during infinite scroll.
This causes Svelte's keyed each block to throw a duplicate key error.

Fix by deduplicating results by id using a Map before rendering.

Co-Authored-By: Justin Edmund <justin@jedmund.com>

src/lib/components/sidebar/SearchContent.svelte

@@ -112,10 +112,16 @@
 	})
 
 	// Flatten all pages into a single items array
-	const searchResults = $derived(
+	const rawResults = $derived(
 		searchQueryResult.data?.pages.flatMap((page) => page.results) ?? []
 	)
 
+	// Deduplicate by id - needed because the API may return the same item across pages
+	// (e.g., due to items being added/removed between page fetches)
+	const searchResults = $derived(
+		Array.from(new Map(rawResults.map((item) => [item.id, item])).values())
+	)
+
 	// Use runed's IsInViewport for viewport detection
 	const inViewport = new IsInViewport(() => sentinelEl, {
 		rootMargin: '200px'