style(tools, llm): 统一导入顺序与代码格式

examples/knowledge_search_demo.rs

@@ -38,14 +38,26 @@ async fn main() {
     let ks = KnowledgeStore::new(store);
 
     let pages = vec![
-        make_page("rust-1", "Rust 入门", "Rust 是一门系统级编程语言，注重安全性与并发。"),
-        make_page("python-1", "Python 简介", "Python 是一门动态类型的高级编程语言。"),
+        make_page(
+            "rust-1",
+            "Rust 入门",
+            "Rust 是一门系统级编程语言，注重安全性与并发。",
+        ),
+        make_page(
+            "python-1",
+            "Python 简介",
+            "Python 是一门动态类型的高级编程语言。",
+        ),
         make_page(
             "langgraph-1",
             "LangGraph 框架",
             "LangGraph 是 LangChain 的状态图扩展，用于构建多步 Agent。",
         ),
-        make_page("rust-async", "Rust 异步编程", "Rust 异步基于 tokio 与 futures 抽象。"),
+        make_page(
+            "rust-async",
+            "Rust 异步编程",
+            "Rust 异步基于 tokio 与 futures 抽象。",
+        ),
     ];
     for p in &pages {
         ks.add_page(p.clone()).await.expect("保存页面失败");
@@ -62,14 +74,8 @@ async fn main() {
     let result = retriever.retrieve("Rust 异步").await.unwrap();
     println!("query: {}", result.query);
     for item in &result.items {
-        println!(
-            "  命中: {} (score={:.3})",
-            item.page.title, item.score
-        );
-        assert!(
-            (0.0..=1.0).contains(&item.score),
-            "score 应在 [0, 1] 区间"
-        );
+        println!("  命中: {} (score={:.3})", item.page.title, item.score);
+        assert!((0.0..=1.0).contains(&item.score), "score 应在 [0, 1] 区间");
     }
     assert!(!result.items.is_empty(), "应至少命中一个页面");
 
@@ -85,14 +91,8 @@ async fn main() {
         min_score: 0.5,
     };
     let retriever2 = MemoryRetriever::new(ks2, cfg);
-    let result = retriever2
-        .retrieve("完全不相关的火锅配方")
-        .await
-        .unwrap();
-    println!(
-        "无关 query → items.len = {} (期望 0)",
-        result.items.len()
-    );
+    let result = retriever2.retrieve("完全不相关的火锅配方").await.unwrap();
+    println!("无关 query → items.len = {} (期望 0)", result.items.len());
     assert!(result.items.is_empty());
 
     // 4. max_results 截断
@@ -146,4 +146,4 @@ async fn main() {
     assert!(only_stop.items.is_empty(), "纯停用词 query 必须返回空结果");
 
     println!("\n✓ knowledge_search_demo 完成");
-}
+}