refs #739: align Smilegate with application repository layout

ai-web-agent-console/ai_web_agent_console/smilegate_demo/ui/__init__.py

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+"""Presentation modules for the Smilegate demo."""

ai-web-agent-console/ai_web_agent_console/smilegate_demo/ui/shell.py

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+"""Blank presentation shell.
+
+No authentication, data access, MCP call, persistence, or customer text belongs
+in this module. It exists only to prove the minimal Streamlit runtime path.
+"""
+
+from __future__ import annotations
+
+from typing import Any
+
+
+def render_blank_shell(st: Any) -> None:
+    """Render the intentionally empty first review screen."""
+    st.set_page_config(page_title="Smilegate Demo", layout="wide")
+    st.markdown(
+        """
+        <style>
+          [data-testid="stHeader"],
+          [data-testid="stToolbar"],
+          #MainMenu,
+          footer { display: none; }
+          [data-testid="stAppViewContainer"],
+          .stApp { background: #ffffff; }
+          .block-container { padding: 0; max-width: none; }
+        </style>
+        """,
+        unsafe_allow_html=True,
+    )