feat: add get_devices, get_gear, and get_user_profile tools

tests/test_server.py

@@ -247,3 +247,52 @@ 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")
+
+
+def test_get_devices_success():
+    server._auth_state = "authenticated"
+    server._client = MagicMock()
+    server._client.get_devices.return_value = [
+        {"deviceId": "abc123", "productDisplayName": "Forerunner 965", "softwareVersion": "21.20"}
+    ]
+    data = json.loads(server.get_devices())
+    assert data[0]["productDisplayName"] == "Forerunner 965"
+    server._client.get_devices.assert_called_once()
+
+
+def test_get_devices_empty():
+    server._auth_state = "authenticated"
+    server._client = MagicMock()
+    server._client.get_devices.return_value = []
+    assert server.get_devices() == "No devices found."
+
+
+def test_get_gear_success():
+    server._auth_state = "authenticated"
+    server._client = MagicMock()
+    server._client.display_name = "john.doe"
+    server._client.get_gear.return_value = [
+        {"gearPk": "shoe1", "customMakeModel": "Nike Pegasus", "totalDistance": 320000.0}
+    ]
+    data = json.loads(server.get_gear())
+    assert data[0]["customMakeModel"] == "Nike Pegasus"
+    server._client.get_gear.assert_called_once_with("john.doe")
+
+
+def test_get_user_profile_success():
+    server._auth_state = "authenticated"
+    server._client = MagicMock()
+    server._client.get_user_profile.return_value = {
+        "displayName": "john.doe",
+        "age": 35,
+        "weight": 75000.0,
+    }
+    data = json.loads(server.get_user_profile())
+    assert data["displayName"] == "john.doe"
+    server._client.get_user_profile.assert_called_once()
+
+
+def test_gear_devices_profile_unauthenticated():
+    server._auth_state = "unauthenticated"
+    for fn in (server.get_devices, server.get_gear, server.get_user_profile):
+        assert "Not authenticated" in fn()