fix: prevent input field overflow on mobile by ensuring equal margins

Adds box-sizing: border-box to all filter inputs after 'all: unset' to ensure padding is included within the 100% width calculation, preventing horizontal overflow and ensuring equal left/right margins on small screens.

src/routes/[recipeLang=recipeLang]/[name]/+page.svelte

@@ -350,7 +350,7 @@ h4{
 			isLoggedIn={!!data.session?.user}
 		/>
 
-		{#if data.note && data.note.trim()}
+		{#if data.note}
 			<RecipeNote note={data.note}></RecipeNote>
 		{/if}
 </div>