feat(adminui): Transport dropdown on AbCip/AbLegacy driver forms (live-verified on docker-dev)

- AbCip/AbLegacy driver forms gain a Transport InputSelect; FromOptions/ToOptions now carry
  Transport, so saving any other field no longer silently reverts Native to libplctag.
- Both drivers log the constructed transport once per init.
- AbCip factory now takes the host ILoggerFactory (it ran on NullLogger in production, hiding
  every AbCip log line); DriverFactoryBootstrap passes it.
- Gate results: AdminUI /run (T19) native, inverted (dead port) and libplctag legs.

docs/plans/2026-10-07-native-ab-transport-gate-results.md

@@ -187,7 +187,76 @@ see the same split on the press.
 
 ## AdminUI /run (T19)
 
-_(pending)_
+Run 2026-10-07 on the local docker-dev rig (OrbStack), against the ab_server `controllogix` fixture
+on `10.100.0.35:44818`. Every container ran the same freshly built image
+(`otopcua-host:dev` `sha256:91bffbb0…`, checked per container because `:9200` round-robins). The
+modal was driven with the Chrome tools against `http://localhost:9200/raw`.
+
+**Authoring (UI).**
+- Created the AbCip driver `t19-abcip` (`DRV-8ea0f0a8cfde`) in the MAIN cluster.
+- Configure → Transport = "Native (managed)" → Save. `DriverInstance.DriverConfig` then held
+  `"transport":"Native"`, a string.
+- Reopened Configure. The dropdown showed "Native (managed)". Changed only Timeout from 2 to 3 and
+  saved. The row then held `"transport":"Native"` and `"timeout":"00:00:03"`, so the save-reverts-transport
+  defect is fixed live, not only in unit tests.
+- Created device `Device1plc1` with host `ab://10.100.0.35:44818/1,0` (ControlLogix). Test Connect
+  returned `OK · 62 ms`.
+- Added the raw tag `TestDINT` (Int32, read-only, tag path `TestDINT`, DInt).
+- Seeded `TestDINT = 4242` on the simulator so a non-zero value proves the read path.
+- Raw namespace: `ns=2`, the shared `s=OtOpcUa` root plus RawPath ids. UNS uses `ns=3`.
+- RawPath: `t19-abcip/Device1plc1/TestDINT`.
+
+**Leg 1: Native.** The deploy sealed with `acks=6`. Both central nodes logged:
+```
+AbCip driver DRV-8ea0f0a8cfde initializing: transport=Native tagFactory=NativeAbCipTagFactory
+```
+CLI read on central-1 (`:4840`) and central-2 (`:4841`):
+```
+Node:        ns=2;s=t19-abcip/Device1plc1/TestDINT
+Value:       4242
+Status:      0x00000000
+```
+The simulator value was then changed to 5150 through the libplctag CLI. The native-served node
+followed it (`Value: 5150`, `Status: 0x00000000`, source time `23:02:09.60Z`).
+
+**Leg 2: inverted gate (Native, dead port).**
+- Device host changed to `ab://10.100.0.35:44819/1,0`. Nothing listens on 44819
+  (`ss -ltn` count 0).
+- The node went `BadNoCommunication` (value retained). A CLI read failed with
+  `ServiceResultException: [80050000]` (BadCommunicationError). The CLI `read` throws on a Bad
+  status rather than printing it.
+- The central-1 log showed the native error text, raised from `NativeAbCipTagRuntime.ReadAsync`:
+  ```
+  ZB.MOM.WW.OtOpcUa.Driver.Ab.Transport.AbTransportException: TCP connect to 10.100.0.35:44819 failed: ConnectionRefused
+   ---> System.Net.Sockets.SocketException (111): Connection refused
+  ```
+- For contrast, the same dead port under libplctag logged different wording:
+  ```
+  ZB.MOM.WW.OtOpcUa.Driver.Ab.Transport.AbTransportException: ErrorTimeout
+   ---> libplctag.LibPlcTagException: ErrorTimeout
+  ```
+  So the switch changes behaviour and is not inert.
+
+**Leg 3: back to libplctag.**
+- Device restored to port 44818. Configure → Transport = "libplctag (default)" → Save. The row held
+  `"transport":"Libplctag"`.
+- The redeploy sealed with `acks=6`. Both centrals logged
+  `initializing: transport=Libplctag tagFactory=LibplctagTagFactory`.
+- CLI reads on `:4840` and `:4841`: `Value: 5150`, `Status: 0x00000000`.
+
+**Fix found by the gate.** The first deploy logged no transport line. `AbCipDriverFactoryExtensions.Register`
+took no `ILoggerFactory`, and `DriverFactoryBootstrap` registered AbCip without one, so every production
+AbCip driver ran on `NullLogger`. That hid the new line and every existing AbCip warning or error. AbCip
+now takes the host logger factory the same way AbLegacy and Modbus do. `AbCipTransportInitLogTests` is
+falsified by reverting that wiring: 2/2 tests fail.
+
+**Cleanup.**
+- The `t19-abcip` driver, device and tag rows were deleted and the change redeployed (sealed,
+  `acks=6`). Both centrals logged `stopped driver child DRV-8ea0f0a8cfde`.
+- The rig has no test driver pointing at the fixture.
+- The fixture was brought down (`docker compose --profile controllogix down`).
+- The simulator's `TestDINT` was left at 5150 until teardown. The container is gone, so the value
+  does not persist.
 
 ## Real press (T21)