Move the port inspector onto device pages

Replace the all-switches Inspector page with a per-device front panel,
port table and detail panel. /inspector now redirects to the dashboard,
and /device/<name>#port-<n> links directly to a port.

Restore neighbor names after UniFi's LLDP change: read local_port_idx
and resolve neighbors by MAC using Prometheus NIC data, UniFi devices
and the wired client table. This also brings back Run Diagnostics on
server ports, which depends on a named neighbor.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_monitor.py

@@ -373,3 +373,44 @@ class TestUnifiDeviceDetail:
         c = monitor.UnifiClient({'controller': 'https://u.test', 'api_key': 'k'})
         c.session.post = MagicMock(side_effect=OSError('boom'))
         assert c.get_system_events(0, modem_api.WAN_LOG_KEYS) is None
+
+
+class TestLldpCollection:
+    def _client_with(self, entry):
+        c = monitor.UnifiClient({'controller': 'https://u.test', 'api_key': 'k'})
+        resp = MagicMock()
+        resp.json.return_value = {'data': [{
+            'type': 'usw', 'name': 'sw', 'lldp_table': [entry],
+            'port_table': [{'port_idx': 3, 'name': 'Port 3'}],
+        }]}
+        c.session.get = MagicMock(return_value=resp)
+        return c
+
+    def test_current_unifi_field_name(self):
+        ports = self._client_with({'local_port_idx': 3, 'chassis_id': 'aa'}).get_switch_ports()['sw']['ports']
+        assert ports['Port 3']['lldp']['chassis_id'] == 'aa'
+
+    def test_older_unifi_field_name(self):
+        ports = self._client_with({'lldp_port_idx': 3, 'chassis_id': 'aa'}).get_switch_ports()['sw']['ports']
+        assert ports['Port 3']['lldp']['chassis_id'] == 'aa'
+
+    def test_bond_does_not_hide_its_member_nic(self):
+        collector = monitor.LinkStatsCollector.__new__(monitor.LinkStatsCollector)
+        collector.prom = MagicMock()
+        collector.unifi = MagicMock()
+        collector.unifi.get_wired_clients.return_value = []
+        mac = 'aa:bb:cc:dd:ee:ff'
+        collector.prom.query.return_value = [
+            {'metric': {'device': 'bond0', 'address': mac, 'instance': '10.0.0.1:9100'}},
+            {'metric': {'device': 'eth0', 'address': mac, 'instance': '10.0.0.1:9100'}},
+            {'metric': {'device': 'vmbr0', 'address': mac, 'instance': '10.0.0.1:9100'}},
+        ]
+        switches = {'sw': {'ports': {'p': {'lldp': {'chassis_id': 'x', 'port_id': mac.upper()}}}}}
+        collector._resolve_neighbors(switches, {}, {'10.0.0.1:9100': 'alpha'})
+        lldp = switches['sw']['ports']['p']['lldp']
+        assert (lldp['system_name'], lldp['port_id']) == ('alpha', 'eth0')
+
+    def test_client_list_failure_is_empty(self):
+        c = monitor.UnifiClient({'controller': 'https://u.test', 'api_key': 'k'})
+        c.session.get = MagicMock(side_effect=OSError('boom'))
+        assert c.get_wired_clients() == []