v1.9.2: S3 right-click context menu — copy presigned download link

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

core/i18n.py

@@ -390,6 +390,10 @@ _EN = {
     "s3_uploading_n": "Uploading {count} files...",
     "s3_uploaded_n": "Uploaded {count} files",
     "s3_upload_partial": "Uploaded {ok}/{total} files",
+    "s3_copy_link": "Copy Link",
+    "s3_generating_link": "Generating link...",
+    "s3_link_copied": "Link copied to clipboard",
+    "s3_link_failed": "Failed to generate link",
 
     # Grafana tab
     "grafana_refresh": "Refresh",
@@ -892,6 +896,10 @@ _RU = {
     "s3_uploading_n": "Загрузка {count} файлов...",
     "s3_uploaded_n": "Загружено {count} файлов",
     "s3_upload_partial": "Загружено {ok}/{total} файлов",
+    "s3_copy_link": "Копировать ссылку",
+    "s3_generating_link": "Генерация ссылки...",
+    "s3_link_copied": "Ссылка скопирована",
+    "s3_link_failed": "Ошибка генерации ссылки",
 
     # Grafana tab
     "grafana_refresh": "Обновить",
@@ -1394,6 +1402,10 @@ _ZH = {
     "s3_uploading_n": "正在上传 {count} 个文件...",
     "s3_uploaded_n": "已上传 {count} 个文件",
     "s3_upload_partial": "已上传 {ok}/{total} 个文件",
+    "s3_copy_link": "复制链接",
+    "s3_generating_link": "生成链接中...",
+    "s3_link_copied": "链接已复制",
+    "s3_link_failed": "生成链接失败",
 
     # Grafana tab
     "grafana_refresh": "刷新",

core/s3_client.py

@@ -277,6 +277,26 @@ class S3Client:
             log.error("S3 delete failed: %s", exc)
             return False
 
+    def generate_presigned_url(self, bucket: str, key: str,
+                               expires_in: int = 3600) -> str | None:
+        """Generate a presigned download URL for an object.
+
+        expires_in: URL lifetime in seconds (default 1 hour).
+        Returns URL string or None on failure.
+        """
+        if not self._ensure_connected():
+            return None
+        try:
+            url = self._client.generate_presigned_url(
+                "get_object",
+                Params={"Bucket": bucket, "Key": key},
+                ExpiresIn=expires_in,
+            )
+            return url
+        except Exception as exc:
+            log.error("S3 presigned URL failed: %s", exc)
+            return None
+
     def get_object_size(self, bucket: str, key: str) -> int:
         """Get size of an object in bytes."""
         if not self._ensure_connected():