COVERAGE: patch 91% → 96%+ — 603 tests, tasks.py at 100%

New/extended tests across billboard, dashboard, drama, epic, gameboard,
and lyric to cover previously untested branches: dev_login view, scroll
position endpoints, sky preview error paths, drama to_prose/to_activity
branches, consumer broadcast handlers, tarot deck draw/shuffle, astrology
model __str__, character model, sig reserve/ready/confirm views, natus
preview/save views, and the full tasks.py countdown scheduler.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/apps/lyric/tests/integrated/test_views.py

@@ -85,3 +85,25 @@ class LoginViewTest(TestCase):
             mock_auth.authenticate.call_args,
             mock.call(uid="abc123")
         )
+
+
+class DevLoginViewTest(TestCase):
+    def test_happy_path_sets_session_cookie_and_redirects(self):
+        from django.test import override_settings
+        with override_settings(DEBUG=True):
+            response = self.client.get("/lyric/dev-login/testsessionkey/")
+        self.assertEqual(response.status_code, 302)
+        self.assertEqual(response["Location"], "/")
+        self.assertIn("sessionid", response.cookies)
+
+    def test_next_param_sets_redirect_target(self):
+        from django.test import override_settings
+        with override_settings(DEBUG=True):
+            response = self.client.get("/lyric/dev-login/key/?next=/gameboard/")
+        self.assertEqual(response["Location"], "/gameboard/")
+
+    def test_returns_404_when_debug_is_false(self):
+        from django.test import override_settings
+        with override_settings(DEBUG=False):
+            response = self.client.get("/lyric/dev-login/key/")
+        self.assertEqual(response.status_code, 404)