fix: Improve security and UI stability

app.py

@@ -286,7 +286,7 @@ with gr.Blocks(theme=gr.themes.Base(primary_hue="green", neutral_hue="slate"), t
             </h2>
             </div>
             """)
-            negotiation_display = gr.HTML("The agent negotiation log will appear here once you begin.")
+            negotiation_display = gr.Markdown("The agent negotiation log will appear here once you begin.")
             
         with gr.Column(scale=1, min_width=300):
              # --- SIDEBAR: STATUS & DELIVERABLES ---

real_ai_agents_implementation.py

@@ -272,7 +272,7 @@ class FigureDrafterAgent(BaseAgent):
 
 class SegmindIdeogramAgent:
     def __init__(self):
-        self.api_key = os.getenv("SEGMIND_API_KEY", "SG_f5de4e5bf40aa615") # Use user's key as default
+        self.api_key = os.getenv("SEGMIND_API_KEY") # Use user's key as default
         self.url = "https://api.segmind.com/v1/ideogram-3"
 
     def generate_image(self, technical_summary: str, strategic_mandate: str) -> Optional[str]: