feat: add window management (list, minimize-all, focus, maximize)

crates/common/src/protocol.rs

@@ -1,6 +1,14 @@
 use serde::{Deserialize, Serialize};
 use uuid::Uuid;
 
+/// Information about a single window on the client machine
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct WindowInfo {
+    pub id: u64,
+    pub title: String,
+    pub visible: bool,
+}
+
 /// Messages sent from the relay server to a connected client
 #[derive(Debug, Clone, Serialize, Deserialize)]
 #[serde(tag = "type", rename_all = "snake_case")]
@@ -31,6 +39,14 @@ pub enum ServerMessage {
         request_id: Option<Uuid>,
         message: String,
     },
+    /// List all visible windows on the client
+    ListWindowsRequest { request_id: Uuid },
+    /// Minimize all windows (like Win+D)
+    MinimizeAllRequest { request_id: Uuid },
+    /// Bring a window to the foreground
+    FocusWindowRequest { request_id: Uuid, window_id: u64 },
+    /// Maximize a window and bring it to the foreground
+    MaximizeAndFocusRequest { request_id: Uuid, window_id: u64 },
 }
 
 /// Messages sent from the client to the relay server
@@ -53,13 +69,18 @@ pub enum ClientMessage {
         stderr: String,
         exit_code: i32,
     },
-    /// Generic acknowledgement for click/type
+    /// Generic acknowledgement for click/type/minimize-all/focus/maximize
     Ack { request_id: Uuid },
     /// Client error response
     Error {
         request_id: Uuid,
         message: String,
     },
+    /// Response to a list-windows request
+    ListWindowsResponse {
+        request_id: Uuid,
+        windows: Vec<WindowInfo>,
+    },
 }
 
 /// Mouse button variants