Fix admin import chain and tests

backend/tests/test_admin_dashboard_api.py

@@ -0,0 +1,40 @@
+
+from backend.database import db
+from backend.main import app
+from fastapi.testclient import TestClient
+
+client = TestClient(app)
+
+
+def setup_function() -> None:
+    db._cases.clear()  # type: ignore[attr-defined]
+
+
+def test_admin_dashboard_reflects_outcomes_and_distance_median() -> None:
+    db.create_case(age=12, gender='female', status='new')
+    db.create_case(age=17, gender='male', status='analyzed', found_alive=True, found_distance_km=2.0)
+    db.create_case(age=19, gender='female', status='closed', found_alive=False, found_distance_km=6.0)
+
+    response = client.get('/api/v1/admin/dashboard')
+
+    assert response.status_code == 200
+    payload = response.json()
+    assert payload['total_cases'] == 3
+    assert payload['found_alive_count'] == 1
+    assert payload['found_deceased_count'] == 1
+    assert payload['unknown_outcome_count'] == 1
+    assert payload['median_found_distance_km'] == 4.0
+    assert payload['recent_activity_count'] == 3
+
+
+def test_admin_dashboard_is_zero_safe_when_no_cases_exist() -> None:
+    response = client.get('/api/v1/admin/dashboard')
+
+    assert response.status_code == 200
+    payload = response.json()
+    assert payload['total_cases'] == 0
+    assert payload['found_alive_count'] == 0
+    assert payload['found_deceased_count'] == 0
+    assert payload['unknown_outcome_count'] == 0
+    assert payload['median_found_distance_km'] is None
+    assert payload['recent_activity_count'] == 0