Fix scroll position on map viewport change

Scroll to bottom of .property-filters minus masthead height when
map viewport changes and results refresh. Only scrolls upward,
never down. Uses instant scroll behavior.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

wp-content/themes/homeproz/template-parts/property/property-filters.js

@@ -1773,9 +1773,17 @@
             InfiniteScrollState.pages = {};
             InfiniteScrollState.pendingPage = null;
 
+            // Scroll to bottom edge of .property-filters - bottom margin + masthead height
+            var $filters = $('.property-filters').first();
+            var $masthead = $('#masthead');
+            if ($filters.length) {
+                var mastheadHeight = $masthead.length ? $masthead.outerHeight() : 0;
+                var targetScroll = $filters.offset().top + $filters.outerHeight() - mastheadHeight;
                 var currentScroll = window.scrollY || window.pageYOffset;
-            if (currentScroll > 0) {
-                window.scrollTo(0, 0);
+                // Only scroll up, never down
+                if (currentScroll > targetScroll) {
+                    window.scrollTo({ top: targetScroll, behavior: 'instant' });
+                }
             }
         },