Refactor: fix typos (#10200)

### What problem does this PR solve?

1. Fix typos
2. Rename function
3. Use English to write comment

### Type of change

- [x] Refactoring

Signed-off-by: jinhai <haijin.chn@gmail.com>

agent/component/llm.py

@@ -81,9 +81,9 @@ class LLMParam(ComponentParamBase):
 
 class LLM(ComponentBase):
     component_name = "LLM"
-    
-    def __init__(self, canvas, id, param: ComponentParamBase):
-        super().__init__(canvas, id, param)
+
+    def __init__(self, canvas, component_id, param: ComponentParamBase):
+        super().__init__(canvas, component_id, param)
         self.chat_mdl = LLMBundle(self._canvas.get_tenant_id(), TenantLLMService.llm_id2llm_type(self._param.llm_id),
                                   self._param.llm_id, max_retries=self._param.max_retries,
                                   retry_interval=self._param.delay_after_error
@@ -209,7 +209,7 @@ class LLM(ComponentBase):
             return re.sub(r"```\n*$", "", ans, flags=re.DOTALL)
 
         prompt, msg, _ = self._prepare_prompt_variables()
-        error = ""
+        error: str = ""
 
         if self._param.output_structure:
             prompt += "\nThe output MUST follow this JSON format:\n"+json.dumps(self._param.output_structure, ensure_ascii=False, indent=2)