fix: resolve CI build failures (JitPack 403 & Compose coords)

- Replaced external EasingInterpolator dependency with local QuartOutInterpolator to fix JitPack 403
- Fixed incorrect Compose dependency group IDs
- Adopted Compose BOM for reliable versioning
- Updated app module minSdkVersion to 21 to match library Compose requirements
- Fixed syntax errors and orphaned imports in Kotlin migration

Author: ChadCSong

app/build.gradle

@@ -12,7 +12,7 @@ android {
 
     defaultConfig {
         applicationId "com.sackcentury.shinebutton"
-        minSdkVersion 14
+        minSdkVersion 21
         targetSdkVersion 34
         versionCode 1
         versionName "1.0"

shinebuttonlib/build.gradle

@@ -43,15 +43,15 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib:1.7.20"
     testImplementation 'junit:junit:4.13.2'
     implementation 'androidx.appcompat:appcompat:1.6.1'
-    implementation 'com.github.MasayukiSuda:EasingInterpolator:v1.3.2'
 
     // Compose dependencies
-    def compose_version = '1.3.3'
-    implementation "androidx.compose.ui:compose-ui:$compose_version"
-    implementation "androidx.compose.material:compose-material:$compose_version"
-    implementation "androidx.compose.ui:compose-ui-tooling-preview:$compose_version"
-    implementation "androidx.compose.runtime:compose-runtime:$compose_version"
-    implementation "androidx.compose.animation:compose-animation:$compose_version"
+    def composeBom = platform('androidx.compose:compose-bom:2023.01.00')
+    implementation composeBom
+    implementation 'androidx.compose.ui:ui'
+    implementation 'androidx.compose.material:material'
+    implementation 'androidx.compose.ui:ui-tooling-preview'
+    implementation 'androidx.compose.runtime:runtime'
+    implementation 'androidx.compose.animation:animation'
 }
 
 //apply from: '../gradle-mvn-push.gradle'

shinebuttonlib/src/main/java/com/sackcentury/shinebuttonlib/ShineAnimator.kt

@@ -2,8 +2,7 @@ package com.sackcentury.shinebuttonlib
 
 import android.animation.ValueAnimator
 import android.graphics.Canvas
-import com.daasuu.ei.Ease
-import com.daasuu.ei.EasingInterpolator
+import com.sackcentury.shinebuttonlib.interpolator.QuartOutInterpolator
 
 /**
  * ShineAnimator handles the value animation for the shine effect particles.
@@ -21,7 +20,7 @@ class ShineAnimator : ValueAnimator {
         setFloatValues(1f, maxValue)
         duration = animDuration
         startDelay = 200
-        interpolator = EasingInterpolator(Ease.QUART_OUT)
+        interpolator = QuartOutInterpolator()
     }
 
     constructor(durationMs: Long, maxValue: Float, delay: Long) {
@@ -30,7 +29,7 @@ class ShineAnimator : ValueAnimator {
         setFloatValues(1f, maxValue)
         duration = durationMs
         startDelay = delay
-        interpolator = EasingInterpolator(Ease.QUART_OUT)
+        interpolator = QuartOutInterpolator()
     }
 
     fun startAnim() {

shinebuttonlib/src/main/java/com/sackcentury/shinebuttonlib/ShineView.kt

@@ -10,8 +10,7 @@ import android.graphics.RectF
 import android.util.AttributeSet
 import android.view.View
 import android.view.ViewGroup
-import com.daasuu.ei.Ease
-import com.daasuu.ei.EasingInterpolator
+import com.sackcentury.shinebuttonlib.interpolator.QuartOutInterpolator
 import com.sackcentury.shinebuttonlib.listener.SimpleAnimatorListener
 import java.util.*
 
@@ -124,7 +123,7 @@ class ShineView : View {
         // Click splash animation (expanding circle)
         clickAnimator = ValueAnimator.ofFloat(0f, 1.1f).apply {
             duration = clickAnimDuration
-            interpolator = EasingInterpolator(Ease.QUART_OUT)
+            interpolator = QuartOutInterpolator()
             addUpdateListener { valueAnimator ->
                 clickValue = valueAnimator.animatedValue as Float
                 invalidate()

shinebuttonlib/src/main/java/com/sackcentury/shinebuttonlib/interpolator/QuartOutInterpolator.kt

@@ -0,0 +1,15 @@
+package com.sackcentury.shinebuttonlib.interpolator
+
+import android.view.animation.Interpolator
+import kotlin.math.pow
+
+/**
+ * A local implementation of the QuartOut easing function to remove the dependency
+ * on the external EasingInterpolator library which was causing JitPack 403 errors.
+ */
+class QuartOutInterpolator : Interpolator {
+    override fun getInterpolation(input: Float): Float {
+        val t = input - 1f
+        return -(t.pow(3) * t - 1f)
+    }
+}