Remove unused templates for newsletter creation, settings, and submissions; update unsubscribe confirmation link; add tests for email templates API.

tests/test_email_templates_api.py

@@ -0,0 +1,43 @@
+import importlib
+import pytest
+
+server_app_module = importlib.import_module("server.app")
+app = server_app_module.app
+
+
+@pytest.fixture
+def client():
+    with app.test_client() as client:
+        yield client
+
+
+def test_get_settings_returns_dict(client):
+    # Login as admin first
+    client.post('/auth/login', data={'username': 'admin', 'password': 'admin'})
+    resp = client.get('/admin/api/settings')
+    assert resp.status_code == 200
+    body = resp.get_json()
+    assert body['status'] == 'ok'
+    assert isinstance(body.get('settings'), dict)
+
+
+def test_update_and_get_newsletter_template(client):
+    key = 'newsletter_confirmation_template'
+    sample = '<p>Thanks for subscribing, {{email}}</p>'
+
+    # Update via PUT
+    # Login as admin first
+    client.post('/auth/login', data={'username': 'admin', 'password': 'admin'})
+
+    resp = client.put(f'/admin/api/settings/{key}', json={'value': sample})
+    assert resp.status_code == 200
+    body = resp.get_json()
+    assert body['status'] == 'ok'
+
+    # Retrieve via GET and ensure the value is present
+    resp = client.get('/admin/api/settings')
+    assert resp.status_code == 200
+    body = resp.get_json()
+    assert body['status'] == 'ok'
+    settings = body.get('settings') or {}
+    assert settings.get(key) == sample