chore(tool): localize send_file success message and use English Javadoc

mateclaw-server/src/main/java/vip/mate/tool/builtin/SendFileTool.java

@@ -16,13 +16,15 @@ import java.nio.file.Path;
 import java.util.Map;
 
 /**
- * 内置工具：将服务器上的现有文件发送给用户
+ * Built-in tool: send an existing server file to the user.
  * <p>
- * 读取指定路径的文件，放入 {@link GeneratedFileCache} 生成临时下载链接，
- * 由渠道适配器（飞书/钉钉/Telegram 等）自动检测并作为原生附件发送。
+ * Reads the file at the given path and stores it in {@link GeneratedFileCache}
+ * to mint a short-lived download link, which channel adapters (Feishu, DingTalk,
+ * Telegram, etc.) auto-detect and deliver as a native attachment.
  * <p>
- * 与 {@link ReadFileTool} 不同，此工具处理任意文件类型（包括二进制文件），
- * 目标是将文件作为附件发送而非读取其文本内容。
+ * Unlike {@link ReadFileTool}, this handles any file type (including binary
+ * files): the goal is to deliver the file as an attachment rather than read
+ * its text content.
  *
  * @author MateClaw Team
  */
@@ -128,9 +130,7 @@ public class SendFileTool {
             // adapter's GeneratedFileScrubber detects the URL and sends the
             // file as a native attachment. The LLM MUST echo the URL in its
             // reply for the scrubber to pick it up.
-            return displayName + " 已发送：[" + displayName + "](" + url + ")（链接 10 分钟内有效）。\n"
-                    + "重要：回答用户时**必须**使用上述相对路径 `" + url + "`，"
-                    + "**不要**添加任何 https://、http:// 域名前缀，前端会自动拼接当前主机。";
+            return i18n.msg("tool.send_file.success", displayName, url);
 
         } catch (Exception e) {
             log.error("[SendFile] Failed to send file: {}", e.getMessage(), e);

mateclaw-server/src/main/resources/messages.properties

@@ -324,3 +324,4 @@ chat.stopMarker.userAborted=[\u5df2\u88ab\u7528\u6237\u4e2d\u6b62]
 # --- Tool: send_file ---
 tool.send_file.error.too_large=\u6587\u4ef6\u8fc7\u5927\uff1a{0}MB \u8d85\u51fa\u9650\u5236 {1}MB
 tool.send_file.error.failed=\u53d1\u9001\u6587\u4ef6\u5931\u8d25\uff1a{0}
+tool.send_file.success={0} \u5df2\u53d1\u9001\uff1a[{0}]({1})\uff08\u94fe\u63a5 10 \u5206\u949f\u5185\u6709\u6548\uff09\u3002\n\u91cd\u8981\uff1a\u56de\u7b54\u7528\u6237\u65f6**\u5fc5\u987b**\u4f7f\u7528\u4e0a\u8ff0\u76f8\u5bf9\u8def\u5f84 `{1}`\uff0c**\u4e0d\u8981**\u6dfb\u52a0\u4efb\u4f55 https://\u3001http:// \u57df\u540d\u524d\u7f00\uff0c\u524d\u7aef\u4f1a\u81ea\u52a8\u62fc\u63a5\u5f53\u524d\u4e3b\u673a\u3002

mateclaw-server/src/main/resources/messages_en.properties

@@ -331,3 +331,4 @@ chat.stopMarker.userAborted=[Stopped by user]
 # --- Tool: send_file ---
 tool.send_file.error.too_large=File too large: {0}MB exceeds limit of {1}MB
 tool.send_file.error.failed=Failed to send file: {0}
+tool.send_file.success={0} sent: [{0}]({1}) (link valid for 10 minutes).\nIMPORTANT: when replying to the user you **must** use the relative path `{1}` exactly; do **not** prepend any https:// or http:// host. The frontend will prepend the current host automatically.