fix(server): fix ruff format violations and complete ServerConfig export in server __init__

- Add blank lines before nested async function definitions in langgraph_platform_steps.py to satisfy ruff format check (E302/W391 style)
- Import ServerConfig from .config in server/__init__.py so it is properly exported (was listed in __all__ but not imported)
- Add type annotation to create_app() signature for full static typing compliance

features/steps/langgraph_platform_steps.py

@@ -29,6 +29,7 @@ def step_create_actor_graph(context):
 @when("I register the graph with RemoteGraphManager")
 def step_register_graph(context):
     """Register the graph with RemoteGraphManager."""
+
     async def _register():
         context.manager = RemoteGraphManager(endpoint="http://localhost:8123")
         await context.manager.register_graph("test_graph", context.test_graph)
@@ -39,6 +40,7 @@ def step_register_graph(context):
 @then("the graph should be available for remote execution")
 def step_verify_graph_registered(context):
     """Verify the graph is registered."""
+
     async def _verify():
         graph = await context.manager.get_graph("test_graph")
         assert graph is not None, "Graph should be registered"
@@ -49,6 +51,7 @@ def step_verify_graph_registered(context):
 @given("a registered actor graph")
 def step_setup_registered_graph(context):
     """Set up a registered actor graph."""
+
     async def _setup():
         context.manager = RemoteGraphManager(endpoint="http://localhost:8123")
         context.test_graph = _MockGraph({"output": "test_result"})
@@ -60,6 +63,7 @@ def step_setup_registered_graph(context):
 @when("I execute the registered graph with input data")
 def step_execute_graph(context):
     """Execute the registered graph."""
+
     async def _execute():
         try:
             context.result = await context.manager.execute_graph(
@@ -86,6 +90,7 @@ def step_verify_result_returned(context):
 @given("multiple registered actor graphs")
 def step_setup_multiple_graphs(context):
     """Set up multiple registered graphs."""
+
     async def _setup():
         context.manager = RemoteGraphManager(endpoint="http://localhost:8123")
         for i in range(3):
@@ -98,6 +103,7 @@ def step_setup_multiple_graphs(context):
 @when("I request the list of graphs")
 def step_list_graphs(context):
     """Request the list of graphs."""
+
     async def _list():
         context.graphs = await context.manager.list_graphs()
 
@@ -123,6 +129,7 @@ def step_setup_missing_graph(context, graph_id):
 @when("I attempt to execute the missing graph")
 def step_execute_missing_graph(context):
     """Attempt to execute missing graph."""
+
     async def _execute():
         try:
             await context.manager.execute_graph(context.missing_graph_id, {})

src/cleveragents/server/__init__.py

@@ -6,6 +6,7 @@ actor graphs via LangGraph Platform with RemoteGraph support.
 
 from __future__ import annotations
 
+from .config import ServerConfig
 from .remote_graph import RemoteGraphManager
 
 __all__ = [
@@ -15,7 +16,7 @@ __all__ = [
 ]
 
 
-def create_app(config=None):
+def create_app(config: ServerConfig | None = None) -> object:
     """Create and configure the FastAPI application.
 
     Lazily imports FastAPI to avoid slow import at module load time.