Add secret management guide, client-side performance monitoring, and search accessibility enhancements

- Introduced a comprehensive Secret Management Guide detailing best practices, secret classification, development setup, production management, rotation procedures, and emergency protocols.
- Implemented a client-side performance monitoring script to track various metrics including page load performance, paint metrics, layout shifts, and memory usage.
- Enhanced search accessibility with keyboard navigation support for search results, ensuring compliance with WCAG standards and improving user experience.

backend/manage.py

@@ -3,7 +3,6 @@
 
 import os
 import sys
-from decouple import config
 
 
 def main():
@@ -32,7 +31,20 @@ def main():
 
 
 def detect_settings_module():
-    """Auto-detect the appropriate settings module based on context."""
+    """
+    Auto-detect the appropriate settings module based on context.
+
+    Detection order:
+    1. DJANGO_SETTINGS_MODULE environment variable (explicit override)
+    2. Test command detection (uses test settings)
+    3. Production indicators (environment variables from cloud providers)
+    4. Staging indicators (staging-specific environment variables)
+    5. DEBUG environment variable (False = production)
+    6. Default to local development
+
+    Returns:
+        str: The settings module path (e.g., "config.django.local")
+    """
     # Check if DJANGO_SETTINGS_MODULE is already set
     if "DJANGO_SETTINGS_MODULE" in os.environ:
         return os.environ["DJANGO_SETTINGS_MODULE"]
@@ -43,20 +55,29 @@ def detect_settings_module():
             return "config.django.test_accounts"
         return "config.django.test"
 
-    # Check for production indicators
+    # Production indicators from various cloud providers
     production_indicators = [
         "DYNO",  # Heroku
         "AWS_EXECUTION_ENV",  # AWS Lambda
+        "AWS_ECS_CLUSTER",  # AWS ECS
         "KUBERNETES_SERVICE_HOST",  # Kubernetes
         "DOCKER_CONTAINER",  # Docker
+        "FLY_APP_NAME",  # Fly.io
+        "RAILWAY_ENVIRONMENT",  # Railway
+        "RENDER",  # Render
+        "VERCEL",  # Vercel
     ]
 
     if any(indicator in os.environ for indicator in production_indicators):
         return "config.django.production"
 
+    # Staging detection (explicit staging environment variable)
+    if os.environ.get("ENVIRONMENT", "").lower() in ("staging", "stage"):
+        return "config.django.production"  # Use production settings for staging
+
     # Check DEBUG environment variable
     debug = os.environ.get("DEBUG", "").lower()
-    if debug in ("false", "0", "no"):
+    if debug in ("false", "0", "no", "off"):
         return "config.django.production"
 
     # Default to local development