fix(sdk-python): update current_graph_state after manual emit to persist across iterations

The _merge_emit_state call merges emitted state with current_graph_state
into manually_emitted_state, but the `continue` statement skips the
later current_graph_state.update(updated_state). Without this update,
the next manual emit merges against stale current_graph_state and loses
keys from the previous emit.

Also guards the update call against non-dict values from _merge_emit_state
to prevent TypeError on edge-case non-dict emits.

Author: jpr5

sdk-python/copilotkit/langgraph_agent.py

@@ -436,6 +436,8 @@ async def _stream_events( # pylint: disable=too-many-locals
 
                 if manually_emit_intermediate_state:
                     manually_emitted_state = _merge_emit_state(current_graph_state, cast(Any, event["data"]))
+                    if isinstance(manually_emitted_state, dict):
+                        current_graph_state.update(manually_emitted_state)
                     yield self._emit_state_sync_event(
                         thread_id=thread_id,
                         run_id=run_id,