note: fix paragraphs not appearing on iOS17

In some edge cases, the inflated UiTextView didn't render properly
causing a black screen which needed the user to scroll. Dropped the
inflate size and now only set where selectedTextHeight is .zero, seems
more reliable.

Closes: https://github.com/damus-io/damus/pull/1427
Changelog-Fixed: Fix paragraphs not appearing on iOS17

damus/Components/SelectableText.swift

@@ -28,7 +28,11 @@ struct SelectableText: View {
             )
             .padding([.leading, .trailing], -1.0)
             .onAppear {
-                self.selectedTextWidth = geo.size.width
+                if geo.size.width == .zero {
+                    self.selectedTextHeight = 1000.0
+                } else {
+                    self.selectedTextWidth = geo.size.width
+                }
             }
             .onChange(of: geo.size) { newSize in
                 self.selectedTextWidth = newSize.width