feat: filter device and rack lists by site prefix

Adds a site_prefix filter to the device and rack filtersets and filter
forms. It matches the first word of the site name case-insensitively
and accepts several comma-separated prefixes. Bumps version to 0.14.0.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

netbox_utilities/tests/test_site_prefix.py

@@ -2,10 +2,52 @@ from types import SimpleNamespace
 
 from django.test import SimpleTestCase
 
-from netbox_utilities.site_prefix import COLUMN_NAME, SitePrefixColumn, first_word, prepend_to_default_columns
+from netbox_utilities.site_prefix import (
+    COLUMN_NAME,
+    SitePrefixColumn,
+    first_word,
+    insert_into_fieldsets,
+    prepend_to_default_columns,
+    site_prefix_query,
+    split_prefixes,
+)
 
 
 class SitePrefixTest(SimpleTestCase):
+    def test_split_prefixes_accepts_commas_and_repeated_values(self):
+        self.assertEqual(split_prefixes(["Berlin, DC01", "HH", "DC01", " "]), ["Berlin", "DC01", "HH"])
+        self.assertEqual(split_prefixes(None), [])
+
+    def test_prefix_query_matches_only_the_whole_first_word(self):
+        query = str(site_prefix_query(["DC01"]))
+
+        self.assertIn("('site__name__iexact', 'DC01')", query)
+        self.assertIn("('site__name__iregex', '^DC01\\\\s')", query)
+
+    def test_prefix_query_escapes_regex_characters(self):
+        self.assertIn("^DC\\\\.1\\\\s", str(site_prefix_query(["DC.1"])))
+
+    def test_prefix_field_is_placed_after_site_filter(self):
+        from utilities.forms.rendering import FieldSet
+
+        fieldsets = insert_into_fieldsets(
+            (FieldSet("q", name="Suche"), FieldSet("region_id", "site_id", "location_id", name="Standort")),
+            COLUMN_NAME,
+        )
+
+        self.assertEqual(fieldsets[1].items, ("region_id", "site_id", COLUMN_NAME, "location_id"))
+        self.assertEqual(fieldsets[1].name, "Standort")
+
+    def test_device_and_rack_filters_offer_prefix(self):
+        from dcim.filtersets import DeviceFilterSet, RackFilterSet
+        from dcim.forms import DeviceFilterForm, RackFilterForm
+
+        for filterset in (DeviceFilterSet, RackFilterSet):
+            self.assertIn(COLUMN_NAME, filterset.base_filters)
+        for form in (DeviceFilterForm, RackFilterForm):
+            self.assertIn(COLUMN_NAME, form.base_fields)
+            self.assertTrue(any(COLUMN_NAME in fieldset.items for fieldset in form.fieldsets))
+
     def test_first_word(self):
         self.assertEqual(first_word("Berlin Campus West"), "Berlin")
         self.assertEqual(first_word("  DC01\tFrankfurt "), "DC01")