Add hisparse staging + decode offload guards to is_fully_idle() (#22577)

python/sglang/srt/managers/scheduler.py

@@ -3013,6 +3013,12 @@ class Scheduler(
             if self.disaggregation_mode == DisaggregationMode.DECODE:
                 idle &= len(self.disagg_decode_prealloc_queue.queue) == 0
                 idle &= len(self.disagg_decode_transfer_queue.queue) == 0
+                if self.decode_offload_manager is not None:
+                    idle &= len(self.decode_offload_manager.ongoing_offload) == 0
+
+            # HiSparse: staging requests transitioning prefill -> decode
+            if self.enable_hisparse:
+                idle &= not self.hisparse_coordinator.has_ongoing_staging()
 
             # HiCache: in-flight async ops (GPU↔Host↔L3) must drain before
             # destructive operations like attach/detach/flush_cache.