style(tools, llm): 统一导入顺序与代码格式

src/llm/mock.rs

@@ -97,8 +97,7 @@ impl LlmProvider for MockProvider {
     async fn chat_stream(
         &self,
         _request: MessageRequest,
-    ) -> Result<Pin<Box<dyn Stream<Item = Result<StreamEvent, LlmError>> + Send>>, LlmError>
-    {
+    ) -> Result<Pin<Box<dyn Stream<Item = Result<StreamEvent, LlmError>> + Send>>, LlmError> {
         let response = self.pop()?;
         // 提前 clone 出在 stream 闭包中需要的字段；最后 yield 时 move response。
         let id = response.id.clone();
@@ -206,10 +205,7 @@ mod tests {
     #[tokio::test]
     async fn chat_returns_queued_response() {
         let provider = MockProvider::new(vec![text_response("hello")]);
-        let resp = provider
-            .chat(MessageRequest::default())
-            .await
-            .unwrap();
+        let resp = provider.chat(MessageRequest::default()).await.unwrap();
         assert_eq!(resp.text(), "hello");
         assert_eq!(provider.remaining(), 0);
     }
@@ -231,7 +227,10 @@ mod tests {
     #[tokio::test]
     async fn chat_stream_emits_text_delta_sequence() {
         let provider = MockProvider::new(vec![text_response("hi")]);
-        let mut stream = provider.chat_stream(MessageRequest::default()).await.unwrap();
+        let mut stream = provider
+            .chat_stream(MessageRequest::default())
+            .await
+            .unwrap();
 
         let mut seen_start = false;
         let mut seen_block_start = false;
@@ -283,7 +282,10 @@ mod tests {
             extra: Default::default(),
         };
         let provider = MockProvider::new(vec![response]);
-        let mut stream = provider.chat_stream(MessageRequest::default()).await.unwrap();
+        let mut stream = provider
+            .chat_stream(MessageRequest::default())
+            .await
+            .unwrap();
 
         let mut saw_tool_args = false;
         let mut saw_tool_end = false;
@@ -302,4 +304,4 @@ mod tests {
         assert!(saw_tool_args);
         assert!(saw_tool_end);
     }
-}
+}