fix(clients): flatten scoped remote output

- Render explicit --remote clients results with profile-only labels.

- Suppress remote host group headers for scoped client queries.

- Keep global and mixed client listings grouped by host.

- Update client and CLI tests for scoped remote rendering.

- Bump browser-cli and extension versions to 0.16.5.

uv.lock

@@ -474,7 +474,7 @@ wheels = [
 
 [[package]]
 name = "real-browser-cli"
-version = "0.16.4"
+version = "0.16.5"
 source = { editable = "." }
 dependencies = [
     { name = "click" },