feat: enable ppt_composer.zh_CN.md with request.locale (#694)

* feat: enable ppt_composer.zh_CN.md with request.locale

* fix: GeneratePPTRequest miss locale field

---------

Co-authored-by: Willem Jiang <willem.jiang@gmail.com>

src/ppt/graph/ppt_composer_node.py

@@ -21,7 +21,7 @@ def ppt_composer_node(state: PPTState):
     model = get_llm_by_type(AGENT_LLM_MAP["ppt_composer"])
     ppt_content = model.invoke(
         [
-            SystemMessage(content=get_prompt_template("ppt/ppt_composer")),
+            SystemMessage(content=get_prompt_template("ppt/ppt_composer", locale=state.get("locale", "en-US"))),
             HumanMessage(content=state["input"]),
         ],
     )

src/ppt/graph/state.py

@@ -10,7 +10,7 @@ class PPTState(MessagesState):
 
     # Input
     input: str = ""
-
+    locale: str = ""
     # Output
     generated_file_path: str = ""