Add price format configuration to settings popup and apply to chart

js/ui/chart.js

@@ -319,6 +319,16 @@ constructor() {
                 },
             },
             handleScroll: {
+        // Setup price format selector change handler
+        const priceSelect = document.getElementById("priceFormatSelect");
+        if (priceSelect) {
+            priceSelect.addEventListener("change", (e) => {
+                const precision = parseInt(e.target.value);
+                this.chart.priceScale().applyOptions({
+                    priceFormat: { type: "price", precision: precision, minMove: precision===0 ? 1 : 0.0001 }
+                });
+            });
+        }
                 vertTouchDrag: false,
             },
         });