Merge branch 'wip/attachment_mime'

* wip/attachment_mime:
  core: attachment store: limit concurrent downloads
  core: attachment mime: prefer jpg instead of jfif
  wip: attachment MIME

core/kordophone/src/api/http_client.rs

@@ -625,6 +625,27 @@ impl<K: AuthenticationStore + Send + Sync> HTTPAPIClient<K> {
 
         Ok(response)
     }
+
+    // Fetch an attachment while preserving response headers (e.g., Content-Type).
+    // Returns the streaming body and the Content-Type header if present.
+    pub async fn fetch_attachment_with_metadata(
+        &mut self,
+        guid: &str,
+        preview: bool,
+    ) -> Result<(ResponseStream, Option<String>), Error> {
+        let endpoint = format!("attachment?guid={}&preview={}", guid, preview);
+        let response = self
+            .response_with_body_retry(&endpoint, Method::GET, Body::empty, true)
+            .await?;
+
+        let content_type = response
+            .headers()
+            .get(hyper::header::CONTENT_TYPE)
+            .and_then(|v| v.to_str().ok())
+            .map(|s| s.to_string());
+
+        Ok((ResponseStream::from(response.into_body()), content_type))
+    }
 }
 
 #[cfg(test)]