fix: one-column teasers without an image no longer break the page

f:image threw when the teaser had no image (teaserImage false), and
production showed "Oops, an error occurred!" instead of the element, e.g.
three times on the snowzone privacy page. The image is now skipped like in
the disturber partials.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

packages/ep_theme/Resources/Private/Partials/Teaser/OneColumn.html

@@ -9,12 +9,14 @@
                 <f:if condition="{context.country}">
                     {ep:icon(icon: 'flag-{context.country.code -> f:format.case(mode: \'lower\')}', class: 'w-8 h-6 absolute top-0 left-0')}
                 </f:if>
-                <f:image image="{teaserImage}"
-                         loading="lazy"
-                         class="block w-full h-full object-cover"
-                         width="400c"
-                         height="300c"
-                         alt="{teaserImage.alternative}" />
+                <f:if condition="{teaserImage}">
+                    <f:image image="{teaserImage}"
+                             loading="lazy"
+                             class="block w-full h-full object-cover"
+                             width="400c"
+                             height="300c"
+                             alt="{teaserImage.alternative}" />
+                </f:if>
             </div>
             <div class="flex-1 flex flex-col pt-4 bg-white border border-t-0 border-zinc-200">
                 <a href="{f:uri.typolink(parameter: data.header_link)}" class="px-2 peer headline--3 mb-2 no-underline">