Add price format configuration to settings popup and apply to chart

index.html

@@ -1444,6 +1444,14 @@
                                 <option value="Australia/Sydney">Sydney (AEST/AEDT)</option>
                             </select>
                         </div>
+                    <div class="settings-group">
+                        <label class="settings-label">Price format</label>
+                        <select class="settings-select" id="priceFormatSelect">
+                            <option value="0">Integer (no decimals)</option>
+                            <option value="2">Decimal (2 dp)</option>
+                            <option value="4">Decimal (4 dp)</option>
+                        </select>
+                    </div>
                     </div>
                 </div>
                 <div class="nav-controls" id="navControls">

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,
             },
         });