feat(api): tcp driver registry, identify, preset push delivery

- Track Wi-Fi TCP clients, liveness pings, disconnect broadcast, bind errors via gather\n- Device list/get include connected; POST identify with __identify preset\n- Presets push/send delivery helpers; bump led-driver hello type

Made-with: Cursor

tests/test_endpoints_pytest.py

@@ -348,11 +348,15 @@ def test_settings_controller(server):
     assert resp.status_code == 400
 
 
-def test_profiles_presets_tabs_endpoints(server):
+def test_profiles_presets_tabs_endpoints(server, monkeypatch):
     c: requests.Session = server["client"]
     base_url: str = server["base_url"]
     sender: DummySender = server["sender"]
 
+    import controllers.device as device_ctl
+
+    monkeypatch.setattr(device_ctl, "IDENTIFY_OFF_DELAY_S", 0.05)
+
     unique_profile_name = f"pytest-profile-{uuid.uuid4().hex[:8]}"
 
     resp = c.post(f"{base_url}/profiles", json={"name": unique_profile_name})
@@ -593,6 +597,28 @@ def test_groups_sequences_scenes_palettes_patterns_endpoints(server):
     assert resp.status_code == 200
     assert resp.json()["name"] == "pytest-dev"
     assert resp.json()["type"] == "led"
+    assert resp.json().get("connected") is None
+
+    resp = c.get(f"{base_url}/devices")
+    assert resp.status_code == 200
+    assert resp.json()[dev_id].get("connected") is None
+
+    sender.sent.clear()
+    resp = c.post(f"{base_url}/devices/{dev_id}/identify")
+    assert resp.status_code == 200
+    assert resp.json().get("message")
+    assert len(sender.sent) >= 1
+    first = json.loads(sender.sent[0][0])
+    assert "presets" in first and "select" in first
+    assert first["presets"]["__identify"]["p"] == "blink"
+    assert first["presets"]["__identify"]["d"] == 50
+    assert first["select"]["pytest-dev"] == ["__identify"]
+    deadline = time.monotonic() + 2.0
+    while len(sender.sent) < 2 and time.monotonic() < deadline:
+        time.sleep(0.02)
+    assert len(sender.sent) >= 2
+    second = json.loads(sender.sent[1][0])
+    assert second.get("select") == {"pytest-dev": ["off"]}
 
     resp = c.post(
         f"{base_url}/devices",
@@ -610,6 +636,10 @@ def test_groups_sequences_scenes_palettes_patterns_endpoints(server):
     assert resp.json()[wid]["transport"] == "wifi"
     assert resp.json()[wid]["address"] == "192.168.50.10"
 
+    resp = c.get(f"{base_url}/devices/{wid}")
+    assert resp.status_code == 200
+    assert resp.json().get("connected") is False
+
     resp = c.post(
         f"{base_url}/devices",
         json={