diff --git a/src/main/java/com/wok/supportbot/entity/ChatMessage.java b/src/main/java/com/wok/supportbot/entity/ChatMessage.java
index bfb5308..5f4675e 100644
--- a/src/main/java/com/wok/supportbot/entity/ChatMessage.java
+++ b/src/main/java/com/wok/supportbot/entity/ChatMessage.java
@@ -27,6 +27,7 @@ public class ChatMessage implements Serializable {
     private static final long serialVersionUID = 1L;
 
     @TableId(value = "id", type = IdType.ASSIGN_ID)
+    @JsonSerialize(using = ToStringSerializer.class)
     private Long id;
     
     /**
diff --git a/src/main/java/com/wok/supportbot/service/AiModelConfigService.java b/src/main/java/com/wok/supportbot/service/AiModelConfigService.java
index 038aed1..7ea5bf0 100644
--- a/src/main/java/com/wok/supportbot/service/AiModelConfigService.java
+++ b/src/main/java/com/wok/supportbot/service/AiModelConfigService.java
@@ -66,7 +66,8 @@ public class AiModelConfigService {
         List<Map<String, Object>> formattedRecords = new ArrayList<>();
         for (AiModelConfig record : records) {
             Map<String, Object> formatted = new LinkedHashMap<>();
-            formatted.put("id", record.getId());
+            // 雪花 ID 必须转为字符串，避免 JS 精度丢失（超过 Number.MAX_SAFE_INTEGER）
+            formatted.put("id", record.getId().toString());
             formatted.put("name", record.getName());
             formatted.put("app_type", record.getAppType());
             formatted.put("provider", record.getProvider());
diff --git a/src/main/java/com/wok/supportbot/service/ConversationService.java b/src/main/java/com/wok/supportbot/service/ConversationService.java
index 5f97863..f51a164 100644
--- a/src/main/java/com/wok/supportbot/service/ConversationService.java
+++ b/src/main/java/com/wok/supportbot/service/ConversationService.java
@@ -278,7 +278,8 @@ public class ConversationService {
         List<Map<String, Object>> result = new ArrayList<>();
         for (ChatMessage msg : messages) {
             Map<String, Object> item = new LinkedHashMap<>();
-            item.put("id", msg.getId());
+            // 雪花 ID 必须转为字符串，避免 JS 精度丢失
+            item.put("id", msg.getId().toString());
             item.put("conversationId", msg.getConversationId());
             item.put("messageType", msg.getMessageType());
             item.put("content", msg.getContent());
diff --git a/src/main/java/com/wok/supportbot/service/DocumentService.java b/src/main/java/com/wok/supportbot/service/DocumentService.java
index 74b555e..aa0eb1b 100644
--- a/src/main/java/com/wok/supportbot/service/DocumentService.java
+++ b/src/main/java/com/wok/supportbot/service/DocumentService.java
@@ -396,10 +396,10 @@ public class DocumentService {
             try {
                 int vectorCount = deleteDocument(id);
                 successCount++;
-                details.add(Map.of("id", id, "success", true, "deletedVectors", vectorCount));
+                details.add(Map.of("id", id.toString(), "success", true, "deletedVectors", vectorCount));
             } catch (Exception e) {
                 failCount++;
-                details.add(Map.of("id", id, "success", false, "message", e.getMessage()));
+                details.add(Map.of("id", id.toString(), "success", false, "message", e.getMessage()));
                 log.warn("批量删除文档失败: id={}", id, e);
             }
         }
@@ -426,10 +426,10 @@ public class DocumentService {
             try {
                 reprocessDocument(id);
                 successCount++;
-                details.add(Map.of("id", id, "success", true));
+                details.add(Map.of("id", id.toString(), "success", true));
             } catch (Exception e) {
                 failCount++;
-                details.add(Map.of("id", id, "success", false, "message", e.getMessage()));
+                details.add(Map.of("id", id.toString(), "success", false, "message", e.getMessage()));
                 log.warn("批量重新处理文档失败: id={}", id, e);
             }
         }