make mapped signal readable

packages/signals/Cargo.toml

@@ -25,7 +25,7 @@ futures-util = { workspace = true }
 flume = { version = "0.11.0", default-features = false, features = ["async"] }
 
 [dev-dependencies]
-dioxus = { workspace = true }
+dioxus = { workspace = true, features = ["desktop"]}
 # dioxus-desktop = { workspace = true }
 tokio = { version = "1", features = ["full"] }
 tracing-subscriber = "0.3.17"