Update app.py

app.py

@@ -10,6 +10,10 @@ from mesh_service.run_interface import (
     extract_faces_for_gui   # <-- NEW helper from updated run_interface
 )
 
+# Absolute path to example files inside Docker container
+EXAMPLE_DIR = os.path.join(os.path.dirname(__file__), "example_steps")
+
+
 # -----------------------------------------
 # Gmsh initialize only once
 # -----------------------------------------
@@ -38,7 +42,8 @@ def on_step_upload(step_file):
     labels = [f["label"] for f in faces]
 
     faces_json = json.dumps(faces)
-    default = labels[0] if labels else None
+    #default = labels[0] if labels else None
+    default = None
 
     return gr.update(choices=labels, value=default), faces_json
 
@@ -217,6 +222,7 @@ with gr.Blocks(title="Mesh Refinement Agent") as iface:
             selected_face_label = gr.Dropdown(
                 label="Select Load Face (detected from STEP)",
                 choices=[],
+                value=None,
                 interactive=True
             )
 
@@ -225,12 +231,13 @@ with gr.Blocks(title="Mesh Refinement Agent") as iface:
             )
 
             examples_data = [
-                ["example_steps/example1.step", "3", "bend_bottom", "positive", "high", "Face_A", "[]", "wireframe"],
-                ["example_steps/example2.step", "2", "tension", "negative", "medium", "Face_B", "[]", "highlight"],
-                ["example_steps/example3.step", "3", "bend_bottom", "positive", "high", "Face_C", "[]", "heatmap"],
-                ["example_steps/example4.step", "3.5", "tension", "negative", "medium", "Face_D", "[]", "wireframe"]
+                [f"{EXAMPLE_DIR}/example1.step", "3", "bend_bottom", "positive", "high", None, "[]", "wireframe"],
+                [f"{EXAMPLE_DIR}/example2.step", "2", "tension", "negative", "medium", None, "[]", "highlight"],
+                [f"{EXAMPLE_DIR}/example3.step", "3", "bend_bottom", "positive", "high", None, "[]", "heatmap"],
+                [f"{EXAMPLE_DIR}/example4.step", "3.5", "tension", "negative", "medium", None, "[]", "wireframe"],
             ]
 
+
             # Populate face dropdown upon STEP upload
             step_file.change(
                 on_step_upload,