chore(ui): add elem_id to Gradio components; align MedSAM path with original (no auto SAM); perf tweaks

app.py

@@ -760,26 +760,30 @@ with gr.Blocks(
             image_input = gr.Image(
                 type="filepath",   # ✅ REQUIRED for gradio_client
                 label="Upload Chart Image",
-                height=400
+                height=400,
+                elem_id="image-input"
             )
 
             # Analyze button (single)
             analyze_btn = gr.Button(
                 "🔍 Analyze",
                 variant="primary",
-                size="lg"
+                size="lg",
+                elem_id="analyze-btn"
             )
 
         with gr.Column():
             # Output JSON
             result_output = gr.JSON(
                 label="Analysis Results",
-                height=400
+                height=400,
+                elem_id="result-output"
             )
             # Overlay image output (populated only for medical images)
             overlay_output = gr.Image(
                 label="MedSAM Overlay (Medical images)",
-                height=400
+                height=400,
+                elem_id="overlay-output"
             )
 
     # Single API endpoint for JSON