Improve performance oprimizing queries (#56)

* Extend test coverage

* Implement query optimization

* More aggressing code reuse

* Add more indexes and optimize usage

* Fix tests

* Further optimizations, improve counting to rely on backend DB

* chore: add Makefile for frontend asset minification

- Add comprehensive Makefile with targets for JS and CSS minification
- Implements instructions from ram/portal/static/js/src/README.md
- Provides targets: install, minify, minify-js, minify-css, clean, watch
- Fix main.min.js to only include theme_selector.js and tabs_selector.js
- Remove validators.js from minified output per README instructions

* Add a Makefile to compile JS and CSS

* docs: add blank line whitespace rule to AGENTS.md

Specify that blank lines must not contain any whitespace (spaces or tabs) to maintain code cleanliness and PEP 8 compliance

* Update for 0.20 release with optimizations

* Improve Makefile

ram/consist/admin.py

@@ -59,6 +59,11 @@ class ConsistAdmin(SortableAdminBase, admin.ModelAdmin):
     search_fields = ("identifier",) + list_filter
     save_as = True
 
+    def get_queryset(self, request):
+        """Optimize queryset with select_related and prefetch_related."""
+        qs = super().get_queryset(request)
+        return qs.with_related()
+
     @admin.display(description="Country")
     def country_flag(self, obj):
         return format_html(
@@ -117,12 +122,27 @@ class ConsistAdmin(SortableAdminBase, admin.ModelAdmin):
             "Item ID",
         ]
         data = []
+
+        # Prefetch related data to avoid N+1 queries
+        queryset = queryset.select_related(
+            'company', 'scale'
+        ).prefetch_related(
+            'tags',
+            'consist_item__rolling_stock__rolling_class__type'
+        )
+
         for obj in queryset:
+            # Cache the type count to avoid recalculating for each item
+            types = " + ".join(
+                "{}x {}".format(t["count"], t["type"])
+                for t in obj.get_type_count()
+            )
+            # Cache tags to avoid repeated queries
+            tags_str = settings.CSV_SEPARATOR_ALT.join(
+                t.name for t in obj.tags.all()
+            )
+
             for item in obj.consist_item.all():
-                types = " + ".join(
-                    "{}x {}".format(t["count"], t["type"])
-                    for t in obj.get_type_count()
-                )
                 data.append(
                     [
                         obj.uuid,
@@ -134,9 +154,7 @@ class ConsistAdmin(SortableAdminBase, admin.ModelAdmin):
                         obj.scale.scale,
                         obj.era,
                         html.unescape(strip_tags(obj.description)),
-                        settings.CSV_SEPARATOR_ALT.join(
-                            t.name for t in obj.tags.all()
-                        ),
+                        tags_str,
                         obj.length,
                         types,
                         item.rolling_stock.__str__(),