fix(client): filter invisible windows server-side, log shows real count

crates/client/src/windows_mgmt.rs

@@ -45,13 +45,14 @@ mod win_impl {
         for hwnd in hwnds {
             let visible = unsafe { IsWindowVisible(hwnd).as_bool() };
             let title = hwnd_title(hwnd);
-            if title.is_empty() {
+            // Only return visible windows with a non-empty title
+            if !visible || title.is_empty() {
                 continue;
             }
             windows.push(WindowInfo {
                 id: hwnd.0 as u64,
                 title,
-                visible,
+                visible: true,
             });
         }
         Ok(windows)