fix: resolve all linter errors and a11y warnings

- Fix TS errors: editMode property order, implicit any, string|undefined
- Add $state() to bind:this element refs (IconGrid, EntityPicker, etc.)
- Fix a11y: labels, aria-labels, roles, tabindex on dialogs
- Remove unused imports (tick, svelte-i18n)
- Make AutocompleteInput/TagsInput accept optional string values

src/lib/components/search/SearchDialog.svelte

@@ -4,8 +4,8 @@
 	import SearchResult from './SearchResult.svelte';
 	import { goto } from '$app/navigation';
 
-	let inputEl: HTMLInputElement;
-	let resultsEl: HTMLDivElement;
+	let inputEl: HTMLInputElement = $state() as HTMLInputElement;
+	let resultsEl: HTMLDivElement = $state() as HTMLDivElement;
 
 	$effect(() => {
 		if (search.open && inputEl) {
@@ -68,10 +68,11 @@
 </script>
 
 {#if search.open}
-	<!-- svelte-ignore a11y_no_static_element_interactions -->
+	<!-- svelte-ignore a11y_click_events_have_key_events -->
 	<div
 		class="fixed inset-0 z-50 flex items-start justify-center bg-black/50 pt-[15vh] backdrop-blur-sm"
 		onclick={handleBackdropClick}
+		role="presentation"
 		style="animation: searchFadeIn 0.15s ease-out"
 	>
 		<!-- Dialog -->