Fix profile visibility filtering to respect client assignments

Issue: After implementing visibility control, all profiles were showing
for all clients because existing profiles don't have visibility fields.

Fix: Updated get_profiles_with_visibility() to fall back to CLIENT_PROFILES
mapping when visibility settings are not present in profile JSON files.

Behavior:
- Profiles with visibility field: Use new visibility system
- Profiles without visibility field: Use CLIENT_PROFILES mapping (backward compatible)

This ensures:
- L'Oreal sees: loreal_static, static_general
- Diageo sees: diageo_key_visual, diageo_packaging, static_general
- Unilever sees: unilever_key_visual, unilever_packaging, static_general
- General sees: static_general, inclusive_accessibility

Tested: All clients now correctly see only their assigned profiles

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

backend/client_config.py

@@ -59,6 +59,10 @@ def get_profiles_with_visibility(client_id):
 
     available_profiles = []
 
+    # First, get the profiles assigned to this client in CLIENT_PROFILES
+    # This is our baseline for backward compatibility
+    baseline_profiles = get_client_profiles(client_id)
+
     # Get profiles directory
     profiles_dir = os.path.join(os.path.dirname(__file__), 'profiles')
     profile_files = glob.glob(os.path.join(profiles_dir, '*.json'))
@@ -69,14 +73,23 @@ def get_profiles_with_visibility(client_id):
                 profile_data = json.load(f)
 
             profile_id = os.path.basename(profile_file).replace('.json', '')
-            visibility = profile_data.get('visibility', 'all')
-            visible_to_clients = profile_data.get('visible_to_clients', [])
 
-            # Check if profile should be visible to this client
-            if visibility == 'all':
-                available_profiles.append(profile_id)
-            elif visibility == 'client_specific' and client_id in visible_to_clients:
-                available_profiles.append(profile_id)
+            # Check if profile has visibility settings
+            has_visibility_settings = 'visibility' in profile_data
+
+            if has_visibility_settings:
+                # Use new visibility system if configured
+                visibility = profile_data.get('visibility', 'all')
+                visible_to_clients = profile_data.get('visible_to_clients', [])
+
+                if visibility == 'all':
+                    available_profiles.append(profile_id)
+                elif visibility == 'client_specific' and client_id in visible_to_clients:
+                    available_profiles.append(profile_id)
+            else:
+                # Fall back to CLIENT_PROFILES mapping for backward compatibility
+                if profile_id in baseline_profiles:
+                    available_profiles.append(profile_id)
 
         except (json.JSONDecodeError, FileNotFoundError):
             continue