refine(anfragencenter): clearer selection, card-style property strip, 2-item slider

- InquiryListRow: selected state now uses bright blue (4px #2563eb border,
  #eff6ff bg, blue tenant name) — unmistakable at a glance
- RelatedPropertyCardPanel compact: left panel is a mini property card matching
  supply card style (border, borderRadius 2, hover shadow, 78px image);
  right panel shows exactly 2 match slider cards with ChevronLeft/Right nav
  when more than 2 exist; match cards mirror property card visual language
- Strip maxHeight raised to 260px; reply composer rows 4→5

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/anfragencenter/InquiryReplyComposer.tsx

@@ -109,7 +109,7 @@ export function InquiryReplyComposer({
         value={body}
         onChange={e => setBody(e.target.value)}
         multiline
-        rows={4}
+        rows={5}
         placeholder="Antwort verfassen..."
         fullWidth
       />