Include Horny category in category chart and table

Remove Horny from category filter to display it in the categories chart
and By Category table. Now only .hidden and favorite remain filtered.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

templates/brutalism.html

@@ -882,7 +882,7 @@
             filtered.forEach(g => {
                 if (g.categories && g.categories.length > 0) {
                     g.categories.forEach(cat => {
-                        if (cat === '.hidden' || cat === 'favorite' || cat === 'Horny') return;
+                        if (cat === '.hidden' || cat === 'favorite') return;
                         if (!categoryMap[cat]) {
                             categoryMap[cat] = { name: cat, playtime: 0, gameCount: 0 };
                         }