Wiki pagination — 9 cards/page (3 rows), counter X/27, topic filter pills, prev/next

- wikiPerPage = 9 (3 masonry rows × 3 cols), wikiCurrentPage state
- wikiFilteredData holds sorted/filtered list; renderWikiPage slices it
- Topic filter pills below search bar, rendered from unique topics in data
- searchWiki now works with pagination/filters, resets to page 1
- Counter shows '9/27' style, pagination shows Zurück/Weiter with page info
- Language toggle re-renders wiki topics + page
- New CSS: .wiki-topics, .wiki-topic-filter (pill style), .wiki-footer, .wiki-page-btn

css/styles.css

@@ -1054,6 +1054,85 @@ body[data-lang="en"] .hide-de { display: none !important; }
 .rank-badge.rank-expert { background: #fff3e0; color: #e65100; }
 .rank-badge.rank-legend { background: #fce4ec; color: #c62828; }
 
+/* ========================================
+   WIKI TOPICS — filter pills
+   ======================================== */
+.wiki-topics {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 6px;
+  margin: 12px 0 20px;
+}
+.wiki-topic-filter {
+  background: #f0f2f5;
+  border: none;
+  border-radius: 999px;
+  padding: 5px 12px;
+  font-size: 13px;
+  font-weight: 500;
+  color: #1c1e21;
+  cursor: pointer;
+  transition: background 0.2s, color 0.2s;
+  white-space: nowrap;
+}
+.wiki-topic-filter:hover {
+  background: #e4e6eb;
+}
+.wiki-topic-filter.active {
+  background: #1877f2;
+  color: #fff;
+}
+.wiki-filter-count {
+  font-size: 11px;
+  opacity: 0.7;
+  margin-left: 2px;
+}
+
+/* ========================================
+   WIKI FOOTER — counter + pagination
+   ======================================== */
+.wiki-footer {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 16px;
+  margin-top: 24px;
+  flex-wrap: wrap;
+}
+.wiki-counter {
+  font-size: 14px;
+  font-weight: 600;
+  color: #65676b;
+}
+.wiki-pagination {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+.wiki-page-btn {
+  background: #f0f2f5;
+  border: none;
+  border-radius: 8px;
+  padding: 6px 14px;
+  font-size: 13px;
+  font-weight: 500;
+  color: #1c1e21;
+  cursor: pointer;
+  transition: background 0.2s;
+}
+.wiki-page-btn:hover:not(:disabled) {
+  background: #e4e6eb;
+}
+.wiki-page-btn:disabled {
+  opacity: 0.4;
+  cursor: default;
+}
+.wiki-page-info {
+  font-size: 13px;
+  font-weight: 600;
+  color: #65676b;
+}
+
 /* ========================================
    WIKI CARDS
    ======================================== */