refactor: Refactor header constants for better readability in the app

app.py

@@ -38,6 +38,9 @@ else:
 
 
 # Define constants
+HEADLINE = "# Qwen-VL Object-Detection"
+SUBLINE = "Compare [Qwen3-VL](https://huggingface.co/collections/Qwen/qwen3-vl), [Qwen2.5-VL](https://huggingface.co/collections/Qwen/qwen25-vl) and [Qwen2-VL](https://huggingface.co/collections/Qwen/qwen2-vl) models by [Qwen](https://huggingface.co/Qwen) for object detection."
+
 EXAMPLES_DIR = Path(__file__).parent / "examples"
 DEVICE = "cuda" if torch.cuda.is_available() else "cpu"
 MODEL_IDS = [
@@ -146,10 +149,8 @@ def image_to_base64(image):
 
 
 with gr.Blocks(js=SCRIPT) as demo:
-    gr.Markdown("# Qwen-VL Object-Detection")
-    gr.Markdown(
-        "Compare [Qwen3-VL](https://huggingface.co/collections/Qwen/qwen3-vl), [Qwen2.5-VL](https://huggingface.co/collections/Qwen/qwen25-vl) and [Qwen2-VL](https://huggingface.co/collections/Qwen/qwen2-vl) models by [Qwen](https://huggingface.co/Qwen) for object detection."
-    )
+    gr.Markdown(HEADLINE)
+    gr.Markdown(SUBLINE)
 
     with gr.Row():
         with gr.Column():