feat(calendar): section_header (kicker/number/action/title) im Schema + wired

calendar-Schema extends section_header + title-Feld. CalendarBlockData +
kicker/number/action. CalendarCompact reicht kicker/number an SectionHeader.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/lib/block-types.ts

@@ -507,6 +507,12 @@ export type CalendarBlockData = Omit<
   _type?: "calendar";
   /** Optionaler Titel über dem Kalender. */
   title?: string;
+  /** SectionHeader: Label über dem Titel (uppercase). */
+  kicker?: string;
+  /** SectionHeader: Index vor dem Kicker, z.B. "03". */
+  number?: string;
+  /** SectionHeader: CTA-Link (aufgelöst: url, linkName). */
+  action?: string | { url?: string; linkName?: string; newTab?: boolean };
   /** Slugs oder aufgelöste calendar_item-Einträge. */
   items?: (string | CalendarItemData)[];
   layout?: BlockLayout;

src/lib/components/blocks/CalendarCompactBlock.svelte

@@ -83,6 +83,8 @@
 >
   <div class="mb-4">
     <SectionHeader
+      number={block.number}
+      kicker={block.kicker}
       title={block.title ?? t(T.calendar_next_events)}
       tag="h3"
       actionLabel={linkHref() ? t(T.calendar_all_upcoming) : undefined}