diff --git a/CodeBridge.ico b/CodeBridge.ico
index e69de29..3923236 100644
Binary files a/CodeBridge.ico and b/CodeBridge.ico differ
diff --git a/codebridge/gui/diff_viewer.py b/codebridge/gui/diff_viewer.py
index d3db25e..b6b244c 100644
--- a/codebridge/gui/diff_viewer.py
+++ b/codebridge/gui/diff_viewer.py
@@ -554,9 +554,15 @@ class DiffViewer(tk.Toplevel):
         dst_text = self.left_text if dst == 'left' else self.right_text
         if not messagebox.askyesno('Confirm copy all', f'Copy entire content from {src} to {dst}?', parent=self):
             return
-        content = src_text.get('1.0', 'end')
+        # use end-1c to avoid the Text widget's extra trailing newline
+        content = src_text.get('1.0', 'end-1c')
         dst_text.delete('1.0', 'end')
-        dst_text.insert('1.0', content)
+        # if content is empty, ensure destination becomes empty (no extra newline)
+        if content:
+            dst_text.insert('1.0', content)
+        else:
+            # keep widget empty
+            pass
         self._mark_dirty(dst)
         self._refresh_diff()