Unify post and event cards to one style on the home page

Elternbeirat.Web/Features/Events/EventDate.razor.css

@@ -0,0 +1,9 @@
+/* The date's own look: small and softened, matching <PostDate> so post and event
+   cards read as one style. Lives with the component so every place that renders
+   <EventDate> (list, home embed) shows the date the same way. Positioning (margin
+   to neighbours) is NOT set here -- that is the surrounding list's job. */
+time {
+    display: block;
+    color: var(--color-text-soft);   /* token, so it adapts in dark mode */
+    font-size: 0.85rem;
+}