Fix attachments

internal/forgejo/client.go

@@ -767,6 +767,28 @@ func (c *Client) uploadAttachment(reqURL, filename string, reader io.Reader) (*A
 	return &attachment, nil
 }
 
+// GetAttachmentURL fetches attachment metadata from the API and returns the browser_download_url.
+func (c *Client) GetAttachmentURL(apiURL string) (string, error) {
+	resp, err := c.ProxyDownload(apiURL)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("forgejo API returned %d fetching attachment metadata", resp.StatusCode)
+	}
+
+	var attachment Attachment
+	if err := json.NewDecoder(resp.Body).Decode(&attachment); err != nil {
+		return "", fmt.Errorf("failed to decode attachment metadata: %w", err)
+	}
+	if attachment.DownloadURL == "" {
+		return "", fmt.Errorf("attachment metadata has no browser_download_url")
+	}
+	return attachment.DownloadURL, nil
+}
+
 // ProxyDownload fetches a file from the given Forgejo URL with authentication and streams it back.
 func (c *Client) ProxyDownload(downloadURL string) (*http.Response, error) {
 	httpReq, err := http.NewRequest("GET", downloadURL, nil)

internal/handlers/public/tickets.go

@@ -505,9 +505,17 @@ func (h *TicketHandler) verifyTicketOwnership(c *gin.Context) (*models.Ticket, *
 
 // proxyAssetDownload fetches an asset from Forgejo API and streams it to the client.
 func (h *TicketHandler) proxyAssetDownload(c *gin.Context, assetURL, filename string) {
-	resp, err := h.deps.ForgejoClient.ProxyDownload(assetURL)
+	// First, resolve the actual download URL from the API metadata endpoint.
+	downloadURL, err := h.deps.ForgejoClient.GetAttachmentURL(assetURL)
 	if err != nil {
-		log.Error().Err(err).Str("url", assetURL).Msg("proxy attachment download error")
+		log.Error().Err(err).Str("url", assetURL).Msg("failed to resolve attachment download URL")
+		h.deps.Renderer.RenderError(c.Writer, c.Request, http.StatusBadGateway, "Failed to download file")
+		return
+	}
+
+	resp, err := h.deps.ForgejoClient.ProxyDownload(downloadURL)
+	if err != nil {
+		log.Error().Err(err).Str("url", downloadURL).Msg("proxy attachment download error")
 		h.deps.Renderer.RenderError(c.Writer, c.Request, http.StatusBadGateway, "Failed to download file")
 		return
 	}