feat: Refactor rides app with unique constraints, mixins, and enhanced documentation

- Added migration to convert unique_together constraints to UniqueConstraint for RideModel.
- Introduced RideFormMixin for handling entity suggestions in ride forms.
- Created comprehensive code standards documentation outlining formatting, docstring requirements, complexity guidelines, and testing requirements.
- Established error handling guidelines with a structured exception hierarchy and best practices for API and view error handling.
- Documented view pattern guidelines, emphasizing the use of CBVs, FBVs, and ViewSets with examples.
- Implemented a benchmarking script for query performance analysis and optimization.
- Developed security documentation detailing measures, configurations, and a security checklist.
- Compiled a database optimization guide covering indexing strategies, query optimization patterns, and computed fields.

templates/components/ui/dropdown.html

@@ -1,12 +1,15 @@
+{% load safe_html %}
+{# Security: Trigger and content are sanitized to allow only safe HTML elements. #}
+
 <div class="relative inline-block text-left" x-data="{ open: false }" @click.away="open = false">
     <div @click="open = !open">
         {% if trigger %}
-            {{ trigger|safe }}
+            {{ trigger|sanitize }}
         {% else %}
-            <button type="button" 
-                    class="inline-flex w-full justify-center gap-x-1.5 rounded-md bg-white px-3 py-2 text-sm font-semibold text-gray-900 shadow-sm ring-1 ring-inset ring-gray-300 hover:bg-gray-50" 
-                    id="menu-button" 
-                    aria-expanded="true" 
+            <button type="button"
+                    class="inline-flex w-full justify-center gap-x-1.5 rounded-md bg-white px-3 py-2 text-sm font-semibold text-gray-900 shadow-sm ring-1 ring-inset ring-gray-300 hover:bg-gray-50"
+                    id="menu-button"
+                    aria-expanded="true"
                     aria-haspopup="true">
                 {{ label|default:"Options" }}
                 <svg class="w-5 h-5 -mr-1 text-gray-400" viewBox="0 0 20 20" fill="currentColor" aria-hidden="true">
@@ -29,7 +32,7 @@
          aria-labelledby="menu-button"
          tabindex="-1">
         <div class="py-1" role="none">
-            {{ content|safe }}
+            {{ content|sanitize }}
             {% block dropdown_content %}{% endblock %}
         </div>
     </div>