fix chat session traces and document paths

src/test/java/com/superbiz/agent/service/DocumentManagementServiceTest.java

@@ -0,0 +1,41 @@
+package com.superbiz.agent.service;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+import org.springframework.mock.web.MockMultipartFile;
+import org.springframework.test.util.ReflectionTestUtils;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class DocumentManagementServiceTest {
+
+    @TempDir
+    Path tempDir;
+
+    @Test
+    void saveToLocalStoresRelativePathUnderKnowledgeBase() throws Exception {
+        DocumentManagementService service = new DocumentManagementService();
+        ReflectionTestUtils.setField(service, "knowledgeBasePath", tempDir.toString());
+        MockMultipartFile file = new MockMultipartFile(
+                "file",
+                "runbook.md",
+                "text/markdown",
+                "runbook content".getBytes()
+        );
+
+        String storedPath = ReflectionTestUtils.invokeMethod(
+                service,
+                "saveToLocal",
+                file,
+                "runbook.md",
+                "payment"
+        );
+
+        assertEquals("payment/runbook.md", storedPath);
+        assertTrue(Files.exists(tempDir.resolve("payment").resolve("runbook.md")));
+    }
+}

src/test/java/com/superbiz/agent/service/KnowledgeIndexServiceTest.java

@@ -4,8 +4,6 @@ import com.superbiz.agent.dto.KnowledgeEntry;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.io.TempDir;
-import org.mockito.Mock;
-import org.mockito.MockitoAnnotations;
 import org.springframework.test.util.ReflectionTestUtils;
 
 import java.nio.file.Files;
@@ -21,17 +19,13 @@ class KnowledgeIndexServiceTest {
 
     private KnowledgeIndexService service;
 
-    @Mock
-    private FrontmatterParser frontmatterParser;
-
     @TempDir
     Path tempDir;
 
     @BeforeEach
     void setUp() {
-        MockitoAnnotations.openMocks(this);
         service = new KnowledgeIndexService();
-        ReflectionTestUtils.setField(service, "frontmatterParser", frontmatterParser);
+        ReflectionTestUtils.setField(service, "knowledgeBasePath", tempDir.toString());
     }
 
     @Test
@@ -144,6 +138,30 @@ class KnowledgeIndexServiceTest {
         assertTrue(result.contains("Test content"));
     }
 
+    @Test
+    void testReadDocument_relativePathUnderBasePath() throws Exception {
+        Path categoryDir = tempDir.resolve("payment");
+        Files.createDirectories(categoryDir);
+        Path testFile = categoryDir.resolve("relative.md");
+        Files.writeString(testFile, "Relative content");
+
+        String result = service.readDocument("payment/relative.md", 100);
+
+        assertEquals("Relative content", result);
+    }
+
+    @Test
+    void testReadDocument_legacyPathAlreadyContainsBasePath() throws Exception {
+        Path categoryDir = tempDir.resolve("payment");
+        Files.createDirectories(categoryDir);
+        Path testFile = categoryDir.resolve("legacy.md");
+        Files.writeString(testFile, "Legacy content");
+
+        String result = service.readDocument(tempDir.getFileName() + "/payment/legacy.md", 100);
+
+        assertEquals("Legacy content", result);
+    }
+
     @Test
     void testReadDocument_exceedsMaxChars() throws Exception {
         // 创建超长内容