tui: Error handling tweak

Moved errors to bottom of screen, fix infinite loop by typing errors
properly

pkg/tui/shared/shared.go

@@ -32,7 +32,7 @@ type (
 	// sent to a state when it is entered
 	MsgViewEnter struct{}
 	// sent when a recoverable error occurs (displayed to user)
-	MsgError error
+	MsgError struct { Err error }
 	// sent when the view has handled a key input
 	MsgKeyHandled tea.KeyMsg
 )
@@ -57,6 +57,10 @@ func KeyHandled(key tea.KeyMsg) tea.Cmd {
 
 func WrapError(err error) tea.Cmd {
 	return func() tea.Msg {
-		return MsgError(err)
+		return MsgError{ Err: err }
 	}
 }
+
+func AsMsgError(err error) MsgError {
+	return MsgError{ Err: err }
+}