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app.py

@@ -243,7 +243,8 @@ def render_mermaid_images(spec: str) -> str:
             return "*[Mermaid diagram removed: unbalanced parentheses]*"
         # Encode and return as mermaid.ink image
         encoded = base64.urlsafe_b64encode(block.encode("utf-8")).decode("ascii")
-        return f"![Dependency Diagram](https://mermaid.ink/svg/{encoded})"
+        url = f"https://mermaid.ink/svg/{encoded}"
+        return f'<img src="{url}" alt="Dependency Diagram" style="max-width: 600px;">'
 
     return re.sub(r"```mermaid\s*\n(.*?)```", replace_block, spec, flags=re.DOTALL)