fix(cli): address PR review warnings

- Skip known cloud LANGSMITH_ENDPOINT values so SaaS users' tracing
  env var doesn't hijack the deploy host URL
- Fix --image-uri help text to accurately describe build+push+deploy
  flow instead of claiming no build step
- Validate existing deployment source before PATCHing with
  --image-uri to give a clear error on incompatible deployments
- Move /api-host path strip before localhost check in
  _smith_dashboard_base_url so local self-hosted status URLs work
- Fix test_constructor_strips_trailing_slash to use base_url property
  instead of removed httpx base_url
- Apply ruff formatting

libs/cli/langgraph_cli/deploy.py

@@ -1371,7 +1371,10 @@ def _create_host_backend_client(
         langsmith_endpoint = env_vars.get("LANGSMITH_ENDPOINT") or os.environ.get(
             "LANGSMITH_ENDPOINT"
         )
-        if langsmith_endpoint and langsmith_endpoint.rstrip("/") not in _cloud_endpoints:
+        if (
+            langsmith_endpoint
+            and langsmith_endpoint.rstrip("/") not in _cloud_endpoints
+        ):
             from urllib.parse import urlparse as _urlparse
 
             _p = _urlparse(langsmith_endpoint)
@@ -1818,9 +1821,7 @@ def _deploy_cmd(
         existing = _call_host_backend_with_optional_tenant(
             client, lambda c: c.get_deployment(deployment_id)
         )
-        existing_source = (
-            existing.get("source") if isinstance(existing, dict) else None
-        )
+        existing_source = existing.get("source") if isinstance(existing, dict) else None
         if existing_source and existing_source != "external_docker":
             raise click.UsageError(
                 f"Deployment {deployment_id} was created with source "

libs/cli/tests/unit_tests/test_host_backend.py

@@ -25,7 +25,7 @@ def client(mock_transport):
 
 def test_constructor_strips_trailing_slash():
     c = HostBackendClient("https://api.example.com/", "key")
-    assert str(c._client.base_url) == "https://api.example.com"
+    assert c.base_url == "https://api.example.com"
 
 
 def test_constructor_empty_url_raises():