feat(cache): add targeted server-side response caching

apps/reports/tests/test_views.py

@@ -2,6 +2,7 @@ from datetime import date, timedelta
 from decimal import Decimal
 from unittest.mock import patch
 
+from django.core.cache import cache
 from rest_framework.test import APITestCase
 
 from apps.clients.models import Client
@@ -82,6 +83,9 @@ class ReportViewTests(APITestCase):
         )
         entry_member.tags.add(cls.tag)
 
+    def setUp(self):
+        cache.clear()
+
     def test_member_only_sees_own_chart_report(self):
         self.client.force_authenticate(user=self.member)
 
@@ -208,3 +212,27 @@ class ReportViewTests(APITestCase):
         self.assertEqual(response.status_code, 200)
         self.assertEqual(response.data["summary"]["total_duration"], "02:00:00")
         self.assertEqual(response.data["scope"]["from_date"], "2026-04-21")
+
+    def test_table_report_cache_stays_until_time_entry_invalidation(self):
+        self.client.force_authenticate(user=self.owner)
+        url = "/api/reports/table/"
+        params = {"workspace": str(self.workspace.id), "period": "this_month"}
+
+        first_response = self.client.get(url, params)
+        self.assertEqual(first_response.status_code, 200)
+        self.assertEqual(first_response.data["summary"]["total_duration"], "03:00:00")
+
+        member_entry = TimeEntry.objects.get(description="Member work")
+        TimeEntry.objects.filter(id=member_entry.id).update(duration=timedelta(hours=5))
+
+        cached_response = self.client.get(url, params)
+        self.assertEqual(cached_response.status_code, 200)
+        self.assertEqual(cached_response.data["summary"]["total_duration"], "03:00:00")
+
+        member_entry.refresh_from_db()
+        member_entry.description = "Member work updated"
+        member_entry.save(update_fields=["description"])
+
+        fresh_response = self.client.get(url, params)
+        self.assertEqual(fresh_response.status_code, 200)
+        self.assertEqual(fresh_response.data["summary"]["total_duration"], "07:00:00")