fixed plots style

vna_system/web_ui/static/js/modules/settings.js

@@ -325,8 +325,21 @@ export class SettingsManager {
         }
 
         const layoutOverrides = {
-            ...plotConfig.layout,
+            title: { text: title, font: { size: 16, color: '#f1f5f9' } },
-            title: { text: title, font: { size: 16, color: '#f1f5f9' } }
+            xaxis: {
+                ...plotConfig.layout?.xaxis,
+                gridcolor: '#334155',
+                zerolinecolor: '#475569',
+                color: '#cbd5e1',
+                fixedrange: false
+            },
+            yaxis: {
+                ...plotConfig.layout?.yaxis,
+                gridcolor: '#334155',
+                zerolinecolor: '#475569',
+                color: '#cbd5e1',
+                fixedrange: false
+            }
         };
 
         const configOverrides = {