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/bookshelf/admin.py

@@ -98,6 +98,11 @@ class BookAdmin(SortableAdminBase, admin.ModelAdmin):
     search_fields = ("title", "publisher__name", "authors__last_name")
     list_filter = ("publisher__name", "authors", "published")
 
+    def get_queryset(self, request):
+        """Optimize queryset with select_related and prefetch_related."""
+        qs = super().get_queryset(request)
+        return qs.with_related()
+
     fieldsets = (
         (
             None,
@@ -189,6 +194,12 @@ class BookAdmin(SortableAdminBase, admin.ModelAdmin):
         ]
 
         data = []
+
+        # Prefetch related data to avoid N+1 queries
+        queryset = queryset.select_related(
+            'publisher', 'shop'
+        ).prefetch_related('authors', 'tags', 'property__property')
+
         for obj in queryset:
             properties = settings.CSV_SEPARATOR_ALT.join(
                 "{}:{}".format(property.property.name, property.value)
@@ -266,6 +277,11 @@ class CatalogAdmin(SortableAdminBase, admin.ModelAdmin):
         "scales__scale",
     )
 
+    def get_queryset(self, request):
+        """Optimize queryset with select_related and prefetch_related."""
+        qs = super().get_queryset(request)
+        return qs.with_related()
+
     fieldsets = (
         (
             None,
@@ -350,6 +366,12 @@ class CatalogAdmin(SortableAdminBase, admin.ModelAdmin):
         ]
 
         data = []
+
+        # Prefetch related data to avoid N+1 queries
+        queryset = queryset.select_related(
+            'manufacturer', 'shop'
+        ).prefetch_related('scales', 'tags', 'property__property')
+
         for obj in queryset:
             properties = settings.CSV_SEPARATOR_ALT.join(
                 "{}:{}".format(property.property.name, property.value)
@@ -490,6 +512,11 @@ class MagazineAdmin(SortableAdminBase, admin.ModelAdmin):
         "publisher__name",
     )
 
+    def get_queryset(self, request):
+        """Optimize queryset with select_related and prefetch_related."""
+        qs = super().get_queryset(request)
+        return qs.select_related('publisher').prefetch_related('tags')
+
     fieldsets = (
         (
             None,