Connection robustness improvements (#813)

* Clear heartbeat and queue when disconnected

* Give clearer error in case configure fails due to a lost connection. Used to throw 'Packet does not exist'

* If the queue processing error is due to a lost connection, throw it instead of looping endlessly

* In case we send a disconnection event we don't need to also throw

* Catch heartbeat errors

* Also handle invalid state errors

* Handle socket timeouts

* Log heartbeat failures

* Make linter happy

* Transform stream being a singleton prevented reconnection attempts

* Adapt tests to not using singleton

* Aborting already ends the connection

packages/transport-web-serial/src/transport.test.ts

@@ -4,11 +4,12 @@ import { runTransportContract } from "../../../tests/utils/transportContract.ts"
 import { TransportWebSerial } from "./transport.ts";
 
 function stubCoreTransforms() {
-  const toDevice = new TransformStream<Uint8Array, Uint8Array>({
-    transform(chunk, controller) {
-      controller.enqueue(chunk);
-    },
-  });
+  const toDevice = () =>
+    new TransformStream<Uint8Array, Uint8Array>({
+      transform(chunk, controller) {
+        controller.enqueue(chunk);
+      },
+    });
 
   // maps raw bytes -> DeviceOutput.packet
   const fromDeviceFactory = () =>
@@ -18,9 +19,10 @@ function stubCoreTransforms() {
       },
     });
 
+  const transform = Utils.toDeviceStream;
   const restoreTo = vi
     .spyOn(Utils, "toDeviceStream", "get")
-    .mockReturnValue(toDevice as unknown as typeof Utils.toDeviceStream);
+    .mockReturnValue(toDevice as unknown as typeof transform);
 
   const restoreFrom = vi
     .spyOn(Utils, "fromDeviceStream")