Remove password page access control

Removed the access code verification system that required users to enter "SUPPORT" to access the application. This includes:
- Access control session state initialization
- Password input form with CSS styling
- Access validation logic and error handling
- st.stop() call that blocked unauthorized access

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

app.py

@@ -519,72 +519,6 @@ def load_editable_prompts_from_local_or_hf():
             st.error(f"Erreur sauvegarde initiale: {e}")
     return initial_data
 
-# --- ACCESS CODE VERIFICATION ---
-# Initialize access control session state
-if 'access_granted' not in st.session_state:
-    st.session_state.access_granted = False
-if 'access_code_input' not in st.session_state:
-    st.session_state.access_code_input = ""
-
-# Access code popup
-if not st.session_state.access_granted:
-    # Simple CSS for background styling
-    st.markdown("""
-    <style>
-    .stApp {
-        background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
-        backdrop-filter: blur(10px);
-    }
-    .access-container {
-        background: white;
-        padding: 0.6rem;
-        border-radius: 20px;
-        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
-        margin: 0.5rem auto;
-        max-width: 500px;
-        text-align: center;
-    }
-    </style>
-    """, unsafe_allow_html=True)
-    
-    # No vertical spacing to align at top
-    
-    # Create the access form
-    with st.container():
-        st.markdown("""
-        <div class="access-container">
-            <h1 style="color: #333; margin-bottom: 1rem;">🔐 Accès Sécurisé</h1>
-            <p style="color: #666; font-size: 1.1rem; margin-bottom: 2rem;">
-                Veuillez entrer le code d'accès pour utiliser l'application
-            </p>
-        </div>
-        """, unsafe_allow_html=True)
-        
-        # Center the form elements
-        col1, col2, col3 = st.columns([1, 2, 1])
-        with col2:
-            access_code = st.text_input(
-                "Code d'accès", 
-                placeholder="Entrez le code d'accès...",
-                key="access_code_input_field"
-            )
-            
-            if st.button("✅ Valider", use_container_width=True, type="primary"):
-                if access_code == "SUPPORT":
-                    st.session_state.access_granted = True
-                    st.rerun()
-                else:
-                    st.error("❌ Code d'accès incorrect")
-            
-            st.markdown("""
-                <p style="font-style: italic; color: #666; font-size: 0.9rem; margin-top: 1.5rem; text-align: center;">
-                    Pour demander un accès, contactez votre référent métier ou l'administrateur de l'application : 
-                    <a href="mailto:arthur.causse@aibuilders.ai" style="color: #0066cc;">arthur.causse@aibuilders.ai</a>
-                </p>
-            """, unsafe_allow_html=True)
-    
-    # Stop execution here if access not granted
-    st.stop()
 
 # --- Session State Initialization ---
 if 'editable_prompts' not in st.session_state: