feat: add get_steps and get_daily_stats tools

tests/test_server.py

@@ -212,3 +212,38 @@ def test_health_tools_unauthenticated():
     for fn in (server.get_sleep, server.get_heart_rate, server.get_stress,
                server.get_body_battery, server.get_hrv, server.get_spo2):
         assert "Not authenticated" in fn("2026-05-17")
+
+
+def test_get_steps_success():
+    server._auth_state = "authenticated"
+    server._client = MagicMock()
+    server._client.get_steps_data.return_value = [{"steps": 8342, "primaryActivityLevel": "active"}]
+    data = json.loads(server.get_steps("2026-05-17"))
+    assert data[0]["steps"] == 8342
+    server._client.get_steps_data.assert_called_once_with("2026-05-17")
+
+
+def test_get_steps_no_data():
+    server._auth_state = "authenticated"
+    server._client = MagicMock()
+    server._client.get_steps_data.return_value = []
+    assert server.get_steps("2026-05-17") == "No steps data found for 2026-05-17"
+
+
+def test_get_daily_stats_success():
+    server._auth_state = "authenticated"
+    server._client = MagicMock()
+    server._client.get_stats.return_value = {
+        "totalSteps": 9231,
+        "totalKilocalories": 2100.0,
+        "floorsAscended": 5,
+    }
+    data = json.loads(server.get_daily_stats("2026-05-17"))
+    assert data["totalSteps"] == 9231
+    server._client.get_stats.assert_called_once_with("2026-05-17")
+
+
+def test_steps_and_stats_unauthenticated():
+    server._auth_state = "unauthenticated"
+    for fn in (server.get_steps, server.get_daily_stats):
+        assert "Not authenticated" in fn("2026-05-17")