style(tools, llm): 统一导入顺序与代码格式

src/memory/retriever.rs

@@ -97,7 +97,11 @@ impl MemoryRetriever {
 
         // 4. 过滤 → 排序 → 截取
         items.retain(|i| i.score >= self.config.min_score);
-        items.sort_by(|a, b| b.score.partial_cmp(&a.score).unwrap_or(std::cmp::Ordering::Equal));
+        items.sort_by(|a, b| {
+            b.score
+                .partial_cmp(&a.score)
+                .unwrap_or(std::cmp::Ordering::Equal)
+        });
         items.truncate(self.config.max_results);
 
         Ok(RetrievalResult {
@@ -159,12 +163,12 @@ fn char_bigrams(s: &str) -> Vec<String> {
 
 fn default_stop_words() -> HashSet<String> {
     [
-        "the", "a", "an", "is", "are", "was", "were", "be", "been", "being", "have", "has",
-        "had", "do", "does", "did", "will", "would", "should", "could", "may", "might", "shall",
-        "can", "this", "that", "these", "those", "it", "its", "they", "them", "their", "what",
-        "which", "who", "whom", "how", "when", "where", "and", "or", "but", "not", "no", "nor",
-        "so", "if", "then", "else", "with", "without", "for", "to", "from", "in", "on", "at",
-        "by", "of", "as", "into", "through", "during", "before", "after", "above", "below",
+        "the", "a", "an", "is", "are", "was", "were", "be", "been", "being", "have", "has", "had",
+        "do", "does", "did", "will", "would", "should", "could", "may", "might", "shall", "can",
+        "this", "that", "these", "those", "it", "its", "they", "them", "their", "what", "which",
+        "who", "whom", "how", "when", "where", "and", "or", "but", "not", "no", "nor", "so", "if",
+        "then", "else", "with", "without", "for", "to", "from", "in", "on", "at", "by", "of", "as",
+        "into", "through", "during", "before", "after", "above", "below",
     ]
     .iter()
     .map(|s| s.to_string())
@@ -236,7 +240,10 @@ mod tests {
             min_score: 0.99,
         };
         let retriever = MemoryRetriever::new(ks, config);
-        let result = retriever.retrieve("totally unrelated content").await.unwrap();
+        let result = retriever
+            .retrieve("totally unrelated content")
+            .await
+            .unwrap();
         assert!(result.items.is_empty());
     }