major bug fixes

test/remote_integration_test.dart

@@ -159,6 +159,38 @@ void main() {
     expect(host.clientCount, 0);
   });
 
+  test('a dropped session retries instead of detaching (bug-fixes #5)',
+      () async {
+    final session = newSession(host.port!);
+    await connectAuthed(session);
+
+    // Watch for the *next* time we fall back to connecting (i.e. a retry) and
+    // assert no terminal status slips through before it — a drop after a good
+    // connection must be healed, never surfaced as error/disconnected.
+    final retrying = session.status.firstWhere((s) {
+      expect(s, isNot(RemoteConnStatus.error));
+      expect(s, isNot(RemoteConnStatus.disconnected));
+      expect(s, isNot(RemoteConnStatus.denied));
+      return s == RemoteConnStatus.connecting;
+    });
+
+    // Kill the connection from under the client.
+    await host.stop();
+    await retrying;
+    expect(session.currentStatus, RemoteConnStatus.connecting);
+  });
+
+  test('a device that never answers gives up (bug-fixes #5)', () async {
+    // Point at a port with nothing listening: cold dials fail, and after the
+    // capped cold-retry budget the session goes terminal so the controller can
+    // fall back to local playback rather than spin forever.
+    final session = newSession(host.port! + 1);
+    final failed =
+        session.status.firstWhere((s) => s == RemoteConnStatus.error);
+    await session.connect();
+    await failed;
+  });
+
   test('a host broadcast reaches every connected remote', () async {
     final a = newSession(host.port!);
     final b = newSession(host.port!);