enhance wompum grid layout; add aspect ratio support and improve height management

static/js/wompum.js

@@ -6,8 +6,9 @@ class WompumGrid {
             rows: parseInt(element.dataset.rows) || 5
         };
         
-        // Set grid template columns based on data attribute or default
+        // Set grid template columns and rows
         this.gridElement.style.gridTemplateColumns = `repeat(${this.gridSize.columns}, 1fr)`;
+        this.gridElement.style.gridTemplateRows = `repeat(${this.gridSize.rows}, 1fr)`;
         
         // Initialize color calculator
         this.colorCalculator = new ColorCalculator();