Refine character helper reference text

dumas_image_nodes.py

@@ -321,6 +321,7 @@ def _build_character_helper_text(
     lines = [
         first_line,
         f"<Picture {primary_picture}> is the primary full-body reference for {character_label}.",
+        f"<Picture {secondary_picture}> is a frontal facial reference for {character_label}.",
     ]
 
     if character_id:

tests/test_dumas_image_nodes.py

@@ -264,6 +264,7 @@ class DumasImageNodeTests(unittest.TestCase):
             (
                 "<Picture 2> and <Picture 3> reference the same character who is called Dave.\n"
                 "<Picture 2> is the primary full-body reference for Dave.\n"
+                "<Picture 3> is a frontal facial reference for Dave.\n"
                 'The character ID string is "char_dave".\n'
                 "Dave is 6'2\" tall.\n"
                 "Dave has a northern English accent.\n"
@@ -293,7 +294,8 @@ class DumasImageNodeTests(unittest.TestCase):
             result[2],
             (
                 "<Picture 4> and <Picture 6> reference the same character.\n"
-                "<Picture 4> is the primary full-body reference for the character."
+                "<Picture 4> is the primary full-body reference for the character.\n"
+                "<Picture 6> is a frontal facial reference for the character."
             ),
         )