fix(navigation): add equals/hashCode to ModalBottomSheetScene to prevent duplicate sheets

The navigation3 library upgrade from 1.0.1 to 1.1.0 introduced persistent
tracking of overlay scenes via a SnapshotStateList. It checks
`!currentOverlayScenes.contains(it)` before adding new scenes, which
relies on equals(). ModalBottomSheetScene was a plain class with no
equals()/hashCode(), so every recalculation created a non-equal instance
that was added as a duplicate — causing two sheets to animate up
simultaneously when returning from Phantom wallet deeplinks.

Author: bmc08gt

ui/navigation/src/main/kotlin/com/getcode/navigation/scenes/ModalBottomSheetSceneStrategy.kt

@@ -67,6 +67,14 @@ internal class ModalBottomSheetScene<T : Any> @OptIn(ExperimentalMaterial3Api::c
 
     override val entries: List<NavEntry<T>> = listOf(entry)
 
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other !is ModalBottomSheetScene<*>) return false
+        return key == other.key
+    }
+
+    override fun hashCode(): Int = key.hashCode()
+
     @OptIn(ExperimentalMaterial3Api::class)
     override val content: @Composable (() -> Unit) = {
         // Scope composition by the scene key + generation counter so that