[Feature] HunyuanImage-3.0 IT2I: multi-image input + prompt API cleanup (#3444)

Signed-off-by: TaffyOfficial <2324465096@qq.com>
Signed-off-by: TaffyOfficial <wu15922848573@outlook.com>
Signed-off-by: skf1999 <13234016272@163.com>
Signed-off-by: zuiho <2324465096@qq.com>
Signed-off-by: Claude Code <noreply@anthropic.com>
Signed-off-by: zuiho <wu15922848573@outlook.com>
Signed-off-by: TaffyOfficial <2587297563@qq.com>
Co-authored-by: TaffyOfficial <2324465096@qq.com>
Co-authored-by: TaffyOfficial <wu15922848573@outlook.com>
Co-authored-by: skf1999 <13234016272@163.com>

tests/e2e/accuracy/test_hunyuan_image3.py

@@ -93,7 +93,13 @@ def _run(stage_config_path: str, output_path: Path) -> tuple[Image.Image, str, f
     from vllm_omni.platforms import current_omni_platform
 
     tokenizer = AutoTokenizer.from_pretrained(MODEL_NAME, trust_remote_code=True)
-    result = build_prompt_tokens(PROMPT, tokenizer, task="it2i_recaption", sys_type="en_unified")
+    result = build_prompt_tokens(
+        PROMPT,
+        tokenizer,
+        task="it2i",
+        bot_task="recaption",
+        sys_type="en_unified",
+    )
     token_ids = result.token_ids
     system_prompt_type = result.system_prompt_type