model: support Qwen3.5 (#18489)

Co-authored-by: 瑀澈 <yuche.lz@alibaba-inc.com>

python/sglang/srt/speculative/eagle_worker.py

@@ -291,7 +291,11 @@ class EAGLEWorker(TpModelWorker):
                 self.draft_model_runner.tp_group
             ), speculative_moe_backend_context(), speculative_moe_a2a_backend_context():
                 self.forward_draft_extend(
-                    batch, logits_output.hidden_states, next_token_ids, seq_lens_cpu
+                    batch,
+                    logits_output.hidden_states,
+                    next_token_ids,
+                    seq_lens_cpu,
+                    logits_output.mm_input_embeds,
                 )
             return GenerationBatchResult(
                 logits_output=logits_output,
@@ -856,6 +860,7 @@ class EAGLEWorker(TpModelWorker):
         hidden_states: torch.Tensor,
         next_token_ids: torch.Tensor,
         seq_lens_cpu: Optional[torch.Tensor],
+        mm_input_embeds: Optional[torch.Tensor] = None,
     ):
         """Run draft model extend. This API modifies the states of the batch.
 
@@ -880,6 +885,8 @@ class EAGLEWorker(TpModelWorker):
             model_worker_batch, self.draft_model_runner
         )
         forward_batch.return_logprob = False
+        if mm_input_embeds is not None:
+            forward_batch.mm_input_embeds = mm_input_embeds
         logits_output = self.draft_model_runner.forward(forward_batch).logits_output
         if self.enable_nan_detection:
             detect_nan(logits_output)