fix(home): restore pull-to-refresh on home feeds

The `onRefresh: () -> Unit` parameter in the second `RefresheableBox`
overload was shadowed by a local `val onRefresh` of the same name. The
recursive `onRefresh()` call inside the launched coroutine therefore
re-invoked the local wrapper instead of the caller's callback, so
pulling down on the home feed never actually triggered
`feedState.invalidateData()` or the DVM refresh.

Rename the local wrapper to `onRefreshWrapped` so the parameter remains
visible inside the lambda.

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/feeds/RefresheableBox.kt

@@ -73,7 +73,7 @@ fun RefresheableBox(
 ) {
     var isRefreshing by remember { mutableStateOf(false) }
     val scope = rememberCoroutineScope()
-    val onRefresh: () -> Unit = {
+    val onRefreshWrapped: () -> Unit = {
         isRefreshing = true
         scope.launch {
             onRefresh()
@@ -84,7 +84,7 @@ fun RefresheableBox(
 
     PullToRefreshBox(
         isRefreshing = isRefreshing,
-        onRefresh = onRefresh,
+        onRefresh = onRefreshWrapped,
         modifier = Modifier.fillMaxSize(),
         content = content,
     )