fix: handle empty path in ListContents (root listing)

Empty path now yields /contents instead of /contents/ (trailing slash).
Added doc comment noting empty path = repo root.

gitea/client.go

@@ -204,8 +204,14 @@ type ContentEntry struct {
 }
 
 // ListContents lists files and directories at a given path in a repo.
+// Pass an empty path to list the repository root.
 func (c *Client) ListContents(ctx context.Context, owner, repo, path string) ([]ContentEntry, error) {
-	reqURL := fmt.Sprintf("%s/api/v1/repos/%s/%s/contents/%s", c.baseURL, owner, repo, escapePath(path))
+	var reqURL string
+	if path == "" {
+		reqURL = fmt.Sprintf("%s/api/v1/repos/%s/%s/contents", c.baseURL, owner, repo)
+	} else {
+		reqURL = fmt.Sprintf("%s/api/v1/repos/%s/%s/contents/%s", c.baseURL, owner, repo, escapePath(path))
+	}
 	body, err := c.doGet(ctx, reqURL)
 	if err != nil {
 		return nil, fmt.Errorf("list contents %s: %w", path, err)