fix: resolve KeyError: 'question' in chat_dashboard prompt template (#2695)

Co-authored-by: Fangyin Cheng <staneyffer@gmail.com>

Author: WangzJi

packages/dbgpt-app/src/dbgpt_app/scene/chat_dashboard/chat.py

@@ -95,6 +95,19 @@ async def generate_input_values(self) -> Dict:
             "supported_chat_type": self.dashboard_template["supported_chart_type"],
         }
 
+        # Mapping variable names: compatible with custom prompt template variable names
+        # Get the input_variables of the current prompt
+        input_variables = []
+        if hasattr(self.prompt_template, "prompt") and hasattr(
+            self.prompt_template.prompt, "input_variables"
+        ):
+            input_variables = self.prompt_template.prompt.input_variables
+        # Compatible with question and user_input
+        if "question" in input_variables:
+            input_values["question"] = self.current_user_input
+        if "user_input" in input_variables:
+            input_values["user_input"] = self.current_user_input
+
         return input_values
 
     def do_action(self, prompt_response):