feat(adminui): DriverTagPicker modal + 9 static address builders

- DriverTagPicker shell: modal chrome + per-driver picker body
  rendered as ChildContent.
- 9 picker bodies (Modbus/AbCip/AbLegacy/S7/TwinCat/FOCAS/
  OpcUaClient/Galaxy/Historian.Wonderware). 5 have computed
  builder logic + unit tests; 4 are free-text passthroughs
  (live browse for OPC UA + Galaxy is a documented follow-up).
- Each typed driver page gets a "Pick address" button that opens
  the modal with the matching body. Picked address surfaces in
  the modal footer for manual copy — no JS interop in v1.

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Shared/Drivers/Pickers/FOCASAddressPickerBody.razor

@@ -0,0 +1,45 @@
+@* Static FOCAS address builder: parameter group + parameter ID → axis:5 *@
+@using ZB.MOM.WW.OtOpcUa.AdminUI.Components.Shared.Drivers.Pickers
+
+<div class="row g-3">
+    <div class="col-md-4">
+        <label class="form-label">Parameter group</label>
+        <select class="form-select form-select-sm" @bind="_group" @bind:after="OnChangedAsync">
+            <option value="axis">axis</option>
+            <option value="spindle">spindle</option>
+            <option value="program">program</option>
+            <option value="status">status</option>
+        </select>
+    </div>
+    <div class="col-md-3">
+        <label class="form-label">Parameter ID</label>
+        <input type="number" class="form-control form-control-sm" min="0"
+               @bind="_parameterId" @bind:after="OnChangedAsync" />
+    </div>
+</div>
+
+<div class="mt-3">
+    <span class="text-muted small">Result:</span>
+    <code class="mono ms-2">@_built</code>
+</div>
+
+@code {
+    [Parameter] public string CurrentAddress { get; set; } = "";
+    [Parameter] public EventCallback<string> CurrentAddressChanged { get; set; }
+
+    private string _group = "axis";
+    private int _parameterId = 0;
+    private string _built = "";
+
+    protected override void OnInitialized()
+    {
+        _built = FocasAddressBuilder.Build(_group, _parameterId);
+        _ = CurrentAddressChanged.InvokeAsync(_built);
+    }
+
+    private async Task OnChangedAsync()
+    {
+        _built = FocasAddressBuilder.Build(_group, _parameterId);
+        await CurrentAddressChanged.InvokeAsync(_built);
+    }
+}