test(dashboard): Add smoke test to catch rendering errors in CI

Seeds its own test user (no dependency on pre-existing accounts),
logs in, and verifies /dashboard returns 200. Would have caught the
missing current_app import from b76d275.

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

tests/integration/test_dashboard_smoke.py

@@ -0,0 +1,94 @@
+"""
+Dashboard smoke tests
+=====================
+
+Verify /dashboard renders correctly for logged-in users.
+
+These tests seed their own user (no dependency on pre-existing test accounts)
+and exercise the full rendering path, catching missing imports and template errors.
+"""
+
+import pytest
+from werkzeug.security import generate_password_hash
+
+pytestmark = pytest.mark.integration
+
+
+@pytest.fixture
+def dashboard_user(app):
+    """Create a minimal test user directly in the DB for dashboard testing."""
+    from database import SessionLocal, User
+
+    session = SessionLocal()
+    email = 'dashboard-smoke-test@nordabiznes.pl'
+
+    # Clean up from any previous failed run
+    existing = session.query(User).filter_by(email=email).first()
+    if existing:
+        session.delete(existing)
+        session.commit()
+
+    user = User(
+        email=email,
+        password_hash=generate_password_hash('SmokeDashTest!99', method='pbkdf2:sha256'),
+        name='Dashboard Smoke',
+        role='MEMBER',
+        company_role='NONE',
+        is_active=True,
+        is_verified=True,
+    )
+    session.add(user)
+    session.commit()
+    user_id = user.id
+
+    yield {'email': email, 'password': 'SmokeDashTest!99', 'id': user_id}
+
+    # Cleanup
+    session.query(User).filter_by(id=user_id).delete()
+    session.commit()
+    session.close()
+
+
+@pytest.fixture
+def dashboard_client(client, app, dashboard_user):
+    """Test client logged in as the dashboard_user."""
+    with app.app_context():
+        response = client.post('/login', data={
+            'email': dashboard_user['email'],
+            'password': dashboard_user['password'],
+        }, follow_redirects=True)
+
+        # Login must succeed for these tests to be meaningful
+        assert response.status_code == 200, "Login failed for dashboard smoke user"
+
+        return client
+
+
+class TestDashboardRenders:
+    """Verify /dashboard renders without errors (500, NameError, etc.)."""
+
+    def test_dashboard_returns_200(self, dashboard_client):
+        """Dashboard should render successfully (not 500)."""
+        response = dashboard_client.get('/dashboard')
+
+        assert response.status_code == 200, (
+            f"Dashboard returned {response.status_code}. "
+            f"Response: {response.data[:500]}"
+        )
+
+    def test_dashboard_contains_expected_content(self, dashboard_client):
+        """Dashboard should contain key UI elements."""
+        response = dashboard_client.get('/dashboard')
+
+        assert response.status_code == 200
+        text = response.data.decode('utf-8').lower()
+        # Dashboard should contain the user's name or a greeting
+        assert 'dashboard' in text or 'panel' in text or 'witaj' in text
+
+    def test_dashboard_no_server_error(self, dashboard_client):
+        """Dashboard must not return any 5xx error."""
+        response = dashboard_client.get('/dashboard')
+
+        assert response.status_code < 500, (
+            f"Server error on /dashboard: HTTP {response.status_code}"
+        )