Revert "fix(frontend): always show full OISY Wallet text logo on small screens"

This reverts commit b20453f.

Author: sbpublic

src/frontend/src/lib/components/core/SeasonalOisyLogoLarge.svelte

@@ -13,12 +13,13 @@
 
 <SeasonalGuard>
 	{#snippet halloween()}
-		<div class="invert-on-dark-theme logo-container w-24 cursor-pointer">
+		<div class="invert-on-dark-theme logo-container hidden w-24 cursor-pointer 1.5xs:block">
 			<OisyLogoLargeHalloween description={ariaLabel} />
 		</div>
 	{/snippet}
 
-	<picture class="invert-on-dark-theme w-24" aria-label={ariaLabel}>
+	<picture class="invert-on-dark-theme hidden w-24 1.5xs:block" aria-label={ariaLabel}>
+		<source media="(max-width: 639px)" srcset={oisyLogoSmall} />
 		<Img alt={ariaLabel} src={oisyLogoLarge} />
 	</picture>
 </SeasonalGuard>