Add dynamic color palette support

Use Material You dynamic colors derived from wallpaper on Android 12+.
Shows gradient indicator in settings, disabled on older Android versions.

app/src/main/java/cz/bugsy/karemote/data/model/AppSettings.kt

@@ -5,6 +5,7 @@ enum class ThemeMode {
 }
 
 enum class ColorTheme(val displayName: String) {
+    DYNAMIC("Dynamic"),
     DEFAULT("Default"),
     BLUE("Blue"),
     GREEN("Green"),

app/src/main/java/cz/bugsy/karemote/ui/screens/settings/SettingsScreen.kt

@@ -1,5 +1,6 @@
 package cz.bugsy.karemote.ui.screens.settings
 
+import android.os.Build
 import androidx.compose.foundation.background
 import androidx.compose.foundation.border
 import androidx.compose.foundation.clickable
@@ -44,6 +45,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Brush
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.text.font.FontWeight
@@ -253,7 +255,38 @@ private fun ColorThemeOption(
     isSelected: Boolean,
     onClick: () -> Unit
 ) {
+    val isDynamicSupported = Build.VERSION.SDK_INT >= Build.VERSION_CODES.S
+    val isEnabled = theme != ColorTheme.DYNAMIC || isDynamicSupported
+
+    Column(
+        horizontalAlignment = Alignment.CenterHorizontally,
+        modifier = Modifier
+            .clickable(enabled = isEnabled) { onClick() }
+            .then(if (!isEnabled) Modifier.background(Color.Transparent) else Modifier)
+    ) {
+        Box(
+            modifier = Modifier
+                .size(48.dp)
+                .clip(CircleShape)
+                .then(
+                    if (theme == ColorTheme.DYNAMIC) {
+                        Modifier.background(
+                            brush = Brush.sweepGradient(
+                                colors = listOf(
+                                    BluePrimaryLight,
+                                    PurplePrimaryLight,
+                                    RedPrimaryLight,
+                                    OrangePrimaryLight,
+                                    GreenPrimaryLight,
+                                    DefaultPrimaryLight,
+                                    BluePrimaryLight
+                                )
+                            ),
+                            alpha = if (isEnabled) 1f else 0.4f
+                        )
+                    } else {
                         val color = when (theme) {
+                            ColorTheme.DYNAMIC -> Color.Transparent // won't reach here
                             ColorTheme.DEFAULT -> DefaultPrimaryLight
                             ColorTheme.BLUE -> BluePrimaryLight
                             ColorTheme.GREEN -> GreenPrimaryLight
@@ -261,16 +294,9 @@ private fun ColorThemeOption(
                             ColorTheme.PURPLE -> PurplePrimaryLight
                             ColorTheme.RED -> RedPrimaryLight
                         }
-
-    Column(
-        horizontalAlignment = Alignment.CenterHorizontally,
-        modifier = Modifier.clickable { onClick() }
-    ) {
-        Box(
-            modifier = Modifier
-                .size(48.dp)
-                .clip(CircleShape)
-                .background(color)
+                        Modifier.background(color)
+                    }
+                )
                 .then(
                     if (isSelected) {
                         Modifier.border(3.dp, MaterialTheme.colorScheme.outline, CircleShape)
@@ -292,7 +318,8 @@ private fun ColorThemeOption(
         Spacer(modifier = Modifier.height(4.dp))
         Text(
             text = theme.displayName,
-            style = MaterialTheme.typography.labelSmall
+            style = MaterialTheme.typography.labelSmall,
+            color = if (isEnabled) Color.Unspecified else MaterialTheme.colorScheme.onSurface.copy(alpha = 0.38f)
         )
     }
 }

app/src/main/java/cz/bugsy/karemote/ui/theme/Theme.kt

@@ -254,7 +254,15 @@ fun KaRemoteTheme(
         ThemeMode.SYSTEM -> isSystemInDarkTheme()
     }
 
+    val context = LocalContext.current
     val colorScheme = when (colorTheme) {
+        ColorTheme.DYNAMIC -> {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+                if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
+            } else {
+                if (darkTheme) DefaultDarkColorScheme else DefaultLightColorScheme
+            }
+        }
         ColorTheme.DEFAULT -> if (darkTheme) DefaultDarkColorScheme else DefaultLightColorScheme
         ColorTheme.BLUE -> if (darkTheme) BlueDarkColorScheme else BlueLightColorScheme
         ColorTheme.GREEN -> if (darkTheme) GreenDarkColorScheme else GreenLightColorScheme