feat: improve search functionality by normalizing input and character names

src/lib/components/CharacterSearchInput.svelte

@@ -11,6 +11,13 @@
 	let highlightedIndex = 0;
 	let dropdownContainer: HTMLDivElement;
 	let searchContainer: HTMLDivElement;
+
+	function normalizeSearchText(value: string): string {
+		return value
+			.normalize('NFD')
+			.replace(/[\u0300-\u036f]/g, '')
+			.toLowerCase();
+	}
 	
 	onMount(() => {
 		// Add click outside listener
@@ -22,8 +29,8 @@
 	});
 	
 	$: filteredCharacters = characters.filter(char => {
-		const searchTerm = searchInput.toLowerCase();
-		const nameMatches = char.name.toLowerCase().includes(searchTerm);
+		const searchTerm = normalizeSearchText(searchInput);
+		const nameMatches = normalizeSearchText(char.name).includes(searchTerm);
 
 		let epithetsMatches = false;
 		if (char.epithets) {
@@ -34,13 +41,13 @@
 
 				if (Array.isArray(parsedEpithets)) {
 					epithetsMatches = parsedEpithets.some((epithet: string) =>
-						epithet.toLowerCase().includes(searchTerm)
+						normalizeSearchText(epithet).includes(searchTerm)
 					);
 				} else if (typeof parsedEpithets === 'string') {
-					epithetsMatches = parsedEpithets.toLowerCase().includes(searchTerm);
+					epithetsMatches = normalizeSearchText(parsedEpithets).includes(searchTerm);
 				}
 			} catch {
-				epithetsMatches = String(char.epithets).toLowerCase().includes(searchTerm);
+				epithetsMatches = normalizeSearchText(String(char.epithets)).includes(searchTerm);
 			}
 		}