Add RecvMessage to Magpie protocol

apps/magpie/src/protocol.rs

@@ -43,10 +43,19 @@ pub enum MagpieServerMsg {
     SendMessage(SendMessage),
 }
 
+/// A message sent from a script's panel to a client.
+#[derive(Clone, Debug, Deserialize, Serialize)]
+pub struct RecvMessage {
+    pub id: PanelId,
+    pub msg: Vec<u8>,
+}
+
 /// A message sent from the Magpie server to a client.
 #[derive(Clone, Debug, Deserialize, Serialize)]
 #[serde(tag = "kind")]
-pub enum MagpieClientMsg {}
+pub enum MagpieClientMsg {
+    RecvMessage(RecvMessage),
+}
 
 /// A [Messenger] specialized for Magpie clients.
 pub type ClientMessenger<T> = Messenger<T, MagpieClientMsg, MagpieServerMsg>;