Update knob component defaults and clean up unused code

Adjusted the default value, minValue, and step for the volume knob to improve precision. Removed unused `KnobBackgroundCls` and cleaned up unnecessary whitespace for better readability and maintainability.

build.gradle.kts

@@ -3,7 +3,7 @@
 import org.jetbrains.kotlin.gradle.ExperimentalKotlinGradlePluginApi
 
 plugins {
-    kotlin("multiplatform") version "2.1.10"
+    kotlin("multiplatform") version "2.1.20"
     `maven-publish`
     signing
 }

src/jsMain/kotlin/nl/astraeus/vst/ui/components/BaseKnobComponent.kt

@@ -159,7 +159,6 @@ open class BaseKnobComponent(
             KnobVolumeBackgroundCls.name
           )
         }
-
       }
 
       span(KnobTextCls.name) {
@@ -201,6 +200,7 @@ open class BaseKnobComponent(
           activated = false
         }
       }
+
     }
   }
 
@@ -313,7 +313,6 @@ open class BaseKnobComponent(
     object KnobSvgCls : CssName()
     object KnobTextCls : CssName()
     object KnobValueCls : CssName()
-    object KnobBackgroundCls : CssName()
 
     object KnobVolumeCls : CssName()
     object KnobVolumeBackgroundCls : CssName()

test-app/src/jsMain/kotlin/nl/astraeus/vst/ui/view/MainView.kt

@@ -137,11 +137,11 @@ class MainView : Komponent() {
         div(ControlsCss.name) {
           include(
             ExpKnobComponent(
-              value = 0.0,
+              value = 0.001,
               label = "Volume",
-              minValue = 0.0,
+              minValue = 0.001,
               maxValue = 1.0,
-              step = 5.0 / 127.0,
+              step = 10.0 / 127.0,
               width = 100,
               height = 120,
             ) { value ->