feat(adminui): DriverStatusPanel + wire into 9 typed pages

Live panel subscribed to the /hubs/driverstatus SignalR feed —
renders state chip, last-success age, 5-min error count, last
error message. Auto-reconnect; dimmed when no push arrives for 30s.
Hidden for new instances (nothing deployed yet); shown read-only
on every edit-mode page. Reconnect/Restart buttons land in Phase 8.

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/AbCipDriverPage.razor

@@ -36,6 +36,11 @@ else
 
             <DriverIdentitySection Model="_identityModel" Namespaces="_namespaces" IsNew="IsNew" ShowDriverType="false" />
 
+            @if (!IsNew && !string.IsNullOrEmpty(DriverInstanceId))
+            {
+                <DriverStatusPanel DriverInstanceId="@DriverInstanceId" Enabled="@_identityModel.Enabled" />
+            }
+
             @* Operation timeout *@
             <section class="panel rise mt-3" style="animation-delay:.06s">
                 <div class="panel-head">Operation settings</div>

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/AbLegacyDriverPage.razor

@@ -37,6 +37,11 @@ else
 
             <DriverIdentitySection Model="_identityModel" Namespaces="_namespaces" IsNew="IsNew" ShowDriverType="false" />
 
+            @if (!IsNew && !string.IsNullOrEmpty(DriverInstanceId))
+            {
+                <DriverStatusPanel DriverInstanceId="@DriverInstanceId" Enabled="@_identityModel.Enabled" />
+            }
+
             @* Operation settings *@
             <section class="panel rise mt-3" style="animation-delay:.06s">
                 <div class="panel-head">Operation settings</div>

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/FocasDriverPage.razor

@@ -36,6 +36,11 @@ else
 
             <DriverIdentitySection Model="_identityModel" Namespaces="_namespaces" IsNew="IsNew" ShowDriverType="false" />
 
+            @if (!IsNew && !string.IsNullOrEmpty(DriverInstanceId))
+            {
+                <DriverStatusPanel DriverInstanceId="@DriverInstanceId" Enabled="@_identityModel.Enabled" />
+            }
+
             @* Connection *@
             <section class="panel rise mt-3" style="animation-delay:.05s">
                 <div class="panel-head">Connection</div>

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/GalaxyDriverPage.razor

@@ -36,6 +36,11 @@ else
 
             <DriverIdentitySection Model="_identityModel" Namespaces="_namespaces" IsNew="IsNew" ShowDriverType="false" />
 
+            @if (!IsNew && !string.IsNullOrEmpty(DriverInstanceId))
+            {
+                <DriverStatusPanel DriverInstanceId="@DriverInstanceId" Enabled="@_identityModel.Enabled" />
+            }
+
             @* mxaccessgw connection *@
             <section class="panel rise mt-3" style="animation-delay:.06s">
                 <div class="panel-head">mxaccessgw connection</div>

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/HistorianWonderwareDriverPage.razor

@@ -36,6 +36,11 @@ else
 
             <DriverIdentitySection Model="_identityModel" Namespaces="_namespaces" IsNew="IsNew" ShowDriverType="false" />
 
+            @if (!IsNew && !string.IsNullOrEmpty(DriverInstanceId))
+            {
+                <DriverStatusPanel DriverInstanceId="@DriverInstanceId" Enabled="@_identityModel.Enabled" />
+            }
+
             @* Connection *@
             <section class="panel rise mt-3" style="animation-delay:.06s">
                 <div class="panel-head">Connection</div>

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/ModbusDriverPage.razor

@@ -36,6 +36,11 @@ else
 
             <DriverIdentitySection Model="_identityModel" Namespaces="_namespaces" IsNew="IsNew" ShowDriverType="false" />
 
+            @if (!IsNew && !string.IsNullOrEmpty(DriverInstanceId))
+            {
+                <DriverStatusPanel DriverInstanceId="@DriverInstanceId" Enabled="@_identityModel.Enabled" />
+            }
+
             @* Transport *@
             <section class="panel rise mt-3" style="animation-delay:.06s">
                 <div class="panel-head">Transport</div>

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/OpcUaClientDriverPage.razor

@@ -36,6 +36,11 @@ else
 
             <DriverIdentitySection Model="_identityModel" Namespaces="_namespaces" IsNew="IsNew" ShowDriverType="false" />
 
+            @if (!IsNew && !string.IsNullOrEmpty(DriverInstanceId))
+            {
+                <DriverStatusPanel DriverInstanceId="@DriverInstanceId" Enabled="@_identityModel.Enabled" />
+            }
+
             @* Endpoint *@
             <section class="panel rise mt-3" style="animation-delay:.06s">
                 <div class="panel-head">Endpoint</div>

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/S7DriverPage.razor

@@ -36,6 +36,11 @@ else
 
             <DriverIdentitySection Model="_identityModel" Namespaces="_namespaces" IsNew="IsNew" ShowDriverType="false" />
 
+            @if (!IsNew && !string.IsNullOrEmpty(DriverInstanceId))
+            {
+                <DriverStatusPanel DriverInstanceId="@DriverInstanceId" Enabled="@_identityModel.Enabled" />
+            }
+
             @* Connection *@
             <section class="panel rise mt-3" style="animation-delay:.05s">
                 <div class="panel-head">Connection</div>

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/TwinCATDriverPage.razor

@@ -36,6 +36,11 @@ else
 
             <DriverIdentitySection Model="_identityModel" Namespaces="_namespaces" IsNew="IsNew" ShowDriverType="false" />
 
+            @if (!IsNew && !string.IsNullOrEmpty(DriverInstanceId))
+            {
+                <DriverStatusPanel DriverInstanceId="@DriverInstanceId" Enabled="@_identityModel.Enabled" />
+            }
+
             @* Options *@
             <section class="panel rise mt-3" style="animation-delay:.05s">
                 <div class="panel-head">Options</div>

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

@@ -0,0 +1,152 @@
+@* Live driver-status panel — subscribes to /hubs/driverstatus and shows state chip,
+   last-success age, 5-min error count, and last error message.
+   Enabled=false renders a static "Disabled" notice and never opens the hub.
+   Reconnect/Restart buttons are Phase 8 (Task 8.3). *@
+@implements IAsyncDisposable
+@using Microsoft.AspNetCore.SignalR.Client
+@using ZB.MOM.WW.OtOpcUa.Commons.Messages.Drivers
+@inject NavigationManager Nav
+
+<section class="panel rise mt-3" style="animation-delay:.04s; @(_stale ? "opacity:0.5;" : "")">
+    <div class="panel-head d-flex align-items-center gap-2">
+        <span>Driver status</span>
+        @if (_snapshot is not null)
+        {
+            <span class="chip @ChipClass(_snapshot.State)">@_snapshot.State</span>
+        }
+        else if (!Enabled)
+        {
+            <span class="chip chip-idle">Disabled</span>
+        }
+        else if (_connecting)
+        {
+            <span class="chip chip-idle">Connecting&hellip;</span>
+        }
+    </div>
+
+    <div style="padding:1rem">
+        @if (!Enabled)
+        {
+            <p class="mb-0" style="color:var(--ink-soft)">Disabled &mdash; not deployed. Enable the driver and save to start receiving live status.</p>
+        }
+        else if (_error is not null)
+        {
+            <p class="mb-0" style="color:var(--bad)">SignalR error: @_error</p>
+        }
+        else if (_snapshot is null)
+        {
+            <p class="mb-0" style="color:var(--ink-faint)">Awaiting first snapshot&hellip;</p>
+        }
+        else
+        {
+            <div class="d-flex flex-wrap gap-3 align-items-baseline">
+                <span style="color:var(--ink-soft)">
+                    Last success:
+                    @if (_snapshot.LastSuccessfulReadUtc is { } t)
+                    {
+                        <strong>@HumanizeAge(t) ago</strong>
+                    }
+                    else
+                    {
+                        <strong>never</strong>
+                    }
+                </span>
+
+                @if (_snapshot.ErrorCount5Min > 0)
+                {
+                    <span class="chip chip-bad">@_snapshot.ErrorCount5Min error@(_snapshot.ErrorCount5Min == 1 ? "" : "s") / 5 min</span>
+                }
+            </div>
+
+            @if (_snapshot.LastError is { Length: > 0 } lastError)
+            {
+                <details class="mt-2" style="font-size:0.85rem">
+                    <summary style="cursor:pointer; color:var(--ink-soft)">Last error</summary>
+                    <pre class="mt-1 mb-0" style="white-space:pre-wrap; word-break:break-word; color:var(--bad); font-size:0.8rem">@lastError</pre>
+                </details>
+            }
+        }
+    </div>
+</section>
+
+@code {
+    [Parameter, EditorRequired] public string DriverInstanceId { get; set; } = "";
+    [Parameter] public bool Enabled { get; set; } = true;
+
+    private HubConnection? _hub;
+    private DriverHealthChanged? _snapshot;
+    private DateTime _lastUpdateUtc = DateTime.MinValue;
+    private bool _stale;
+    private bool _connecting;
+    private string? _error;
+    private System.Threading.Timer? _timer;
+
+    protected override async Task OnInitializedAsync()
+    {
+        if (!Enabled)
+            return;
+
+        _connecting = true;
+
+        // Tick every 5 s to refresh the stale-dimming check and humanized ages.
+        _timer = new System.Threading.Timer(_ =>
+        {
+            _stale = _snapshot is not null &&
+                     (DateTime.UtcNow - _lastUpdateUtc).TotalSeconds > 30;
+            InvokeAsync(StateHasChanged);
+        }, null, TimeSpan.FromSeconds(5), TimeSpan.FromSeconds(5));
+
+        _hub = new HubConnectionBuilder()
+            .WithUrl(Nav.ToAbsoluteUri("/hubs/driverstatus"))
+            .WithAutomaticReconnect()
+            .Build();
+
+        _hub.On<DriverHealthChanged>("status", snap =>
+        {
+            _snapshot = snap;
+            _lastUpdateUtc = DateTime.UtcNow;
+            _stale = false;
+            InvokeAsync(StateHasChanged);
+        });
+
+        try
+        {
+            await _hub.StartAsync();
+            _connecting = false;
+            await _hub.InvokeAsync("JoinDriver", DriverInstanceId);
+        }
+        catch (Exception ex)
+        {
+            _connecting = false;
+            _error = ex.Message;
+        }
+    }
+
+    public async ValueTask DisposeAsync()
+    {
+        _timer?.Dispose();
+        if (_hub is not null)
+            await _hub.DisposeAsync();
+    }
+
+    // Map DriverState string → chip CSS class using the 4 defined theme variants.
+    private static string ChipClass(string? state) => state switch
+    {
+        "Healthy"      => "chip-ok",
+        "Degraded"     => "chip-warn",
+        "Connecting"   => "chip-warn",
+        "Reconnecting" => "chip-warn",
+        "Faulted"      => "chip-bad",
+        _              => "chip-idle",   // Unknown, Initializing, null
+    };
+
+    private static string HumanizeAge(DateTime utc)
+    {
+        var age = DateTime.UtcNow - utc;
+        if (age.TotalSeconds < 2)   return "just now";
+        if (age.TotalSeconds < 60)  return $"{(int)age.TotalSeconds}s";
+        if (age.TotalMinutes < 60)  return $"{(int)age.TotalMinutes}m {age.Seconds}s";
+        if (age.TotalHours   < 24)  return $"{(int)age.TotalHours}h {age.Minutes}m";
+        return $"{(int)age.TotalDays}d {age.Hours}h";
+    }
+}