feat: default theme is now M3 dynamic colours

Signed-off-by: Infi <wingit@geist.ga>

app/src/main/java/chat/revolt/api/settings/GlobalState.kt

@@ -2,9 +2,10 @@ package chat.revolt.api.settings
 
 import androidx.compose.runtime.mutableStateOf
 import chat.revolt.ui.theme.Theme
+import chat.revolt.ui.theme.getDefaultTheme
 
 object GlobalState {
-    private var _theme = mutableStateOf(Theme.Revolt)
+    private var _theme = mutableStateOf(getDefaultTheme())
     val theme
         get() = _theme.value
 

app/src/main/java/chat/revolt/ui/theme/Theme.kt

@@ -116,4 +116,11 @@ fun RevoltTheme(
 
 fun systemSupportsDynamicColors(): Boolean {
     return Build.VERSION.SDK_INT >= Build.VERSION_CODES.S
+}
+
+fun getDefaultTheme(): Theme {
+    return when {
+        systemSupportsDynamicColors() -> Theme.M3Dynamic
+        else -> Theme.Revolt
+    }
 }