fix: ensure proper truncation

This commit ensures that labels are truncated correctly when they
exceed the available space, even if the space is very limited.

The truncation now avoids cutting off the label at zero width,
which could happen previously, by using a minimum width of 1

igist.el

@@ -1826,13 +1826,14 @@ Its default value is nil."
           (when (plist-get props :children)
             (setq children (plist-get props :children))
             (setq children-indent (plist-get props :align-to-column))))
+        (when (and label (string-match-p "[\n\r\f]" label))
+          (setq label (string-join (split-string label "[\n\r\f]" t) " "))
+          (setq lablen (string-width label)))
         (when (and (>= lablen 3)
                    not-last-col
                    (> lablen available-space))
           (setq label
-                (truncate-string-to-width label available-space nil t t)))
-        (when (and label (string-match-p "[\n\r\f]" label))
-          (setq label (string-join (split-string label "[\n\r\f]" t) " ")))
+                (truncate-string-to-width label (max 1 available-space) nil nil t t)))
         (push
          (cond ((not sortable)
                 (propertize label 'igist-tabulated-list-column-name
@@ -1946,7 +1947,7 @@ column is the last one or not."
         (when (and not-last-col
                    (>= label-width width))
           (setq label (truncate-string-to-width
-                       label width nil nil t "|")
+                       label (max 1 width) nil nil t t)
                 label-width width))
         (setq label (bidi-string-mark-left-to-right label))
         (when-let ((shift