feat(adminui): F15 Phase B — cluster CRUD + Overview/Redundancy routes

- ClustersList (/clusters) — table view, row-click opens detail
- NewCluster (/clusters/new) — EditForm with DataAnnotations; redundancy
  mode + node-count coupling enforced client-side (None→1, Warm/Hot→2);
  CreatedBy taken from AuthenticationStateProvider
- ClusterOverview (/clusters/{id}) — cluster details + last-deployment
  badge + node list. Per Q3, the legacy 10-tab monolith is split into
  separate routes; this page hosts the Overview "tab" as its primary slot
- ClusterRedundancy (/clusters/{id}/redundancy) — static ServiceLevelBase
  config view; live ServiceLevel comes via RedundancyStateActor DPS topic
  (deferred to its own follow-up once the SignalR bridge lands)

The other 8 v1 cluster tabs (Equipment, UNS, Namespaces, Drivers, Tags,
ACLs, ScriptedAlarms, Scripts, Audit) land in Phase C/D.

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

@@ -0,0 +1,136 @@
+@page "/clusters/{ClusterId}"
+@attribute [Microsoft.AspNetCore.Authorization.Authorize]
+@rendermode RenderMode.InteractiveServer
+@using Microsoft.EntityFrameworkCore
+@using ZB.MOM.WW.OtOpcUa.Configuration
+@using ZB.MOM.WW.OtOpcUa.Configuration.Entities
+@inject IDbContextFactory<OtOpcUaConfigDbContext> DbFactory
+@inject NavigationManager Nav
+
+@if (!_loaded)
+{
+    <p>Loading…</p>
+}
+else if (_cluster is null)
+{
+    <section class="panel notice rise" style="animation-delay:.02s">
+        Cluster <span class="mono">@ClusterId</span> was not found.
+        <a class="ms-2" href="/clusters">Back to list</a>.
+    </section>
+}
+else
+{
+    <div class="d-flex justify-content-between align-items-center mb-3">
+        <div>
+            <h4 class="mb-0">@_cluster.Name</h4>
+            <span class="mono text-muted">@_cluster.ClusterId</span>
+            @if (!_cluster.Enabled) { <span class="chip chip-idle ms-2">Disabled</span> }
+        </div>
+        <div>
+            <a href="/deployments" class="btn btn-outline-primary btn-sm">Deployments</a>
+        </div>
+    </div>
+
+    <ul class="nav nav-tabs mb-3">
+        <li class="nav-item"><a class="nav-link active" href="/clusters/@ClusterId">Overview</a></li>
+        <li class="nav-item"><a class="nav-link" href="/clusters/@ClusterId/redundancy">Redundancy</a></li>
+    </ul>
+
+    <section class="card-grid rise" style="animation-delay:.08s">
+        <div class="metric-card">
+            <div class="panel-head">Cluster details</div>
+            <div class="kv"><span class="k">Enterprise / Site</span><span class="v">@_cluster.Enterprise / @_cluster.Site</span></div>
+            <div class="kv"><span class="k">Redundancy</span><span class="v">@_cluster.RedundancyMode (@_cluster.NodeCount node@(_cluster.NodeCount == 1 ? "" : "s"))</span></div>
+            <div class="kv"><span class="k">Created</span><span class="v">@_cluster.CreatedAt.ToString("u") by @_cluster.CreatedBy</span></div>
+            @if (_cluster.ModifiedAt is not null)
+            {
+                <div class="kv"><span class="k">Modified</span><span class="v">@_cluster.ModifiedAt?.ToString("u") by @(_cluster.ModifiedBy ?? "—")</span></div>
+            }
+            @if (!string.IsNullOrWhiteSpace(_cluster.Notes))
+            {
+                <div class="kv"><span class="k">Notes</span><span class="v">@_cluster.Notes</span></div>
+            }
+        </div>
+
+        <div class="metric-card">
+            <div class="panel-head">Last deployment</div>
+            @if (_lastDeployment is null)
+            {
+                <div class="kv"><span class="k">Status</span><span class="v text-muted">none — cluster has never been deployed</span></div>
+            }
+            else
+            {
+                <div class="kv"><span class="k">Revision</span><span class="v mono">@_lastDeployment.RevisionHash[..16]…</span></div>
+                <div class="kv"><span class="k">Status</span><span class="v">@_lastDeployment.Status</span></div>
+                <div class="kv"><span class="k">Created</span><span class="v">@_lastDeployment.CreatedAtUtc.ToString("u")</span></div>
+                @if (_lastDeployment.SealedAtUtc is not null)
+                {
+                    <div class="kv"><span class="k">Sealed</span><span class="v">@_lastDeployment.SealedAtUtc?.ToString("u")</span></div>
+                }
+            }
+        </div>
+    </section>
+
+    <section class="panel rise mt-3" style="animation-delay:.14s">
+        <div class="panel-head">Nodes</div>
+        @if (_nodes is null || _nodes.Count == 0)
+        {
+            <div style="padding:1rem" class="text-muted">No nodes registered.</div>
+        }
+        else
+        {
+            <div class="table-wrap">
+                <table class="data-table">
+                    <thead>
+                        <tr>
+                            <th>Node ID</th>
+                            <th>Host</th>
+                            <th>OPC UA port</th>
+                            <th>ApplicationUri</th>
+                            <th class="num">ServiceLevel base</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        @foreach (var n in _nodes)
+                        {
+                            <tr>
+                                <td><span class="mono">@n.NodeId</span></td>
+                                <td>@n.Host</td>
+                                <td class="num">@n.OpcUaPort</td>
+                                <td><span class="mono small">@n.ApplicationUri</span></td>
+                                <td class="num">@n.ServiceLevelBase</td>
+                            </tr>
+                        }
+                    </tbody>
+                </table>
+            </div>
+        }
+    </section>
+}
+
+@code {
+    [Parameter] public string ClusterId { get; set; } = "";
+
+    private bool _loaded;
+    private ServerCluster? _cluster;
+    private List<ClusterNode>? _nodes;
+    private Deployment? _lastDeployment;
+
+    protected override async Task OnInitializedAsync()
+    {
+        await using var db = await DbFactory.CreateDbContextAsync();
+        _cluster = await db.ServerClusters.AsNoTracking()
+            .FirstOrDefaultAsync(c => c.ClusterId == ClusterId);
+        if (_cluster is not null)
+        {
+            _nodes = await db.ClusterNodes.AsNoTracking()
+                .Where(n => n.ClusterId == ClusterId)
+                .OrderBy(n => n.NodeId)
+                .ToListAsync();
+            _lastDeployment = await db.Deployments.AsNoTracking()
+                .OrderByDescending(d => d.CreatedAtUtc)
+                .FirstOrDefaultAsync();
+        }
+        _loaded = true;
+    }
+}

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

@@ -0,0 +1,111 @@
+@page "/clusters/{ClusterId}/redundancy"
+@attribute [Microsoft.AspNetCore.Authorization.Authorize]
+@rendermode RenderMode.InteractiveServer
+@using Microsoft.EntityFrameworkCore
+@using ZB.MOM.WW.OtOpcUa.Configuration
+@using ZB.MOM.WW.OtOpcUa.Configuration.Entities
+@inject IDbContextFactory<OtOpcUaConfigDbContext> DbFactory
+
+@if (!_loaded)
+{
+    <p>Loading…</p>
+}
+else if (_cluster is null)
+{
+    <section class="panel notice rise" style="animation-delay:.02s">
+        Cluster <span class="mono">@ClusterId</span> was not found.
+        <a class="ms-2" href="/clusters">Back to list</a>.
+    </section>
+}
+else
+{
+    <div class="d-flex justify-content-between align-items-center mb-3">
+        <div>
+            <h4 class="mb-0">@_cluster.Name &middot; Redundancy</h4>
+            <span class="mono text-muted">@_cluster.ClusterId</span>
+        </div>
+    </div>
+
+    <ul class="nav nav-tabs mb-3">
+        <li class="nav-item"><a class="nav-link" href="/clusters/@ClusterId">Overview</a></li>
+        <li class="nav-item"><a class="nav-link active" href="/clusters/@ClusterId/redundancy">Redundancy</a></li>
+    </ul>
+
+    <section class="panel notice rise" style="animation-delay:.02s">
+        v2 redundancy is computed at runtime by <span class="mono">RedundancyStateActor</span>
+        on each admin node. The values below are the static configuration; the resolved live
+        <span class="mono">ServiceLevel</span> for each peer is broadcast on the
+        <span class="mono">redundancy-state</span> DPS topic and consumed by the OPC UA host's
+        <span class="mono">ServerStatus</span> publisher. See
+        <a href="/docs/v2/Architecture-v2.md">docs/v2/Architecture-v2.md</a>.
+    </section>
+
+    <section class="card-grid rise mt-3" style="animation-delay:.08s">
+        <div class="metric-card">
+            <div class="panel-head">Cluster redundancy</div>
+            <div class="kv"><span class="k">Mode</span><span class="v">@_cluster.RedundancyMode</span></div>
+            <div class="kv"><span class="k">Node count</span><span class="v">@_cluster.NodeCount</span></div>
+        </div>
+    </section>
+
+    <section class="panel rise mt-3" style="animation-delay:.14s">
+        <div class="panel-head">Node service-level configuration</div>
+        @if (_nodes is null || _nodes.Count == 0)
+        {
+            <div style="padding:1rem" class="text-muted">No nodes registered.</div>
+        }
+        else
+        {
+            <div class="table-wrap">
+                <table class="data-table">
+                    <thead>
+                        <tr>
+                            <th>Node ID</th>
+                            <th>ApplicationUri</th>
+                            <th class="num">ServiceLevel base</th>
+                            <th>Notes</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        @foreach (var n in _nodes)
+                        {
+                            <tr>
+                                <td><span class="mono">@n.NodeId</span></td>
+                                <td><span class="mono small">@n.ApplicationUri</span></td>
+                                <td class="num">@n.ServiceLevelBase</td>
+                                <td class="text-muted small">
+                                    @if (n.ServiceLevelBase >= 200) { <text>Primary preference</text> }
+                                    else if (n.ServiceLevelBase >= 100) { <text>Secondary preference</text> }
+                                    else { <text>Custom</text> }
+                                </td>
+                            </tr>
+                        }
+                    </tbody>
+                </table>
+            </div>
+        }
+    </section>
+}
+
+@code {
+    [Parameter] public string ClusterId { get; set; } = "";
+
+    private bool _loaded;
+    private ServerCluster? _cluster;
+    private List<ClusterNode>? _nodes;
+
+    protected override async Task OnInitializedAsync()
+    {
+        await using var db = await DbFactory.CreateDbContextAsync();
+        _cluster = await db.ServerClusters.AsNoTracking()
+            .FirstOrDefaultAsync(c => c.ClusterId == ClusterId);
+        if (_cluster is not null)
+        {
+            _nodes = await db.ClusterNodes.AsNoTracking()
+                .Where(n => n.ClusterId == ClusterId)
+                .OrderBy(n => n.NodeId)
+                .ToListAsync();
+        }
+        _loaded = true;
+    }
+}

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

@@ -0,0 +1,77 @@
+@page "/clusters"
+@attribute [Microsoft.AspNetCore.Authorization.Authorize]
+@rendermode RenderMode.InteractiveServer
+@using Microsoft.EntityFrameworkCore
+@using ZB.MOM.WW.OtOpcUa.Configuration
+@using ZB.MOM.WW.OtOpcUa.Configuration.Entities
+@inject IDbContextFactory<OtOpcUaConfigDbContext> DbFactory
+@inject NavigationManager Nav
+
+<div class="d-flex justify-content-between align-items-center mb-3">
+    <h4 class="mb-0">Clusters</h4>
+    <a href="/clusters/new" class="btn btn-primary btn-sm">New cluster</a>
+</div>
+
+@if (_rows is null)
+{
+    <p>Loading…</p>
+}
+else if (_rows.Count == 0)
+{
+    <section class="panel notice rise" style="animation-delay:.02s">
+        No clusters defined yet. Use <strong>New cluster</strong> above to create one.
+    </section>
+}
+else
+{
+    <section class="panel rise" style="animation-delay:.08s">
+        <div class="panel-head">All clusters</div>
+        <div class="table-wrap">
+            <table class="data-table">
+                <thead>
+                    <tr>
+                        <th>Cluster</th>
+                        <th>Site</th>
+                        <th>Nodes</th>
+                        <th>Redundancy</th>
+                        <th>Status</th>
+                        <th>Created</th>
+                    </tr>
+                </thead>
+                <tbody>
+                    @foreach (var c in _rows)
+                    {
+                        <tr style="cursor:pointer" @onclick="() => OpenCluster(c.ClusterId)">
+                            <td>
+                                <span class="mono">@c.ClusterId</span>
+                                <div class="text-muted small">@c.Name</div>
+                            </td>
+                            <td>@c.Enterprise / @c.Site</td>
+                            <td class="num">@c.NodeCount</td>
+                            <td>@c.RedundancyMode</td>
+                            <td>
+                                @if (c.Enabled) { <span class="chip chip-ok">Enabled</span> }
+                                else { <span class="chip chip-idle">Disabled</span> }
+                            </td>
+                            <td class="text-muted small">@c.CreatedAt.ToString("u")</td>
+                        </tr>
+                    }
+                </tbody>
+            </table>
+        </div>
+    </section>
+}
+
+@code {
+    private List<ServerCluster>? _rows;
+
+    protected override async Task OnInitializedAsync()
+    {
+        await using var db = await DbFactory.CreateDbContextAsync();
+        _rows = await db.ServerClusters.AsNoTracking()
+            .OrderBy(c => c.ClusterId)
+            .ToListAsync();
+    }
+
+    private void OpenCluster(string clusterId) => Nav.NavigateTo($"/clusters/{clusterId}");
+}

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

@@ -0,0 +1,141 @@
+@page "/clusters/new"
+@attribute [Microsoft.AspNetCore.Authorization.Authorize]
+@rendermode RenderMode.InteractiveServer
+@using Microsoft.AspNetCore.Components.Forms
+@using Microsoft.EntityFrameworkCore
+@using ZB.MOM.WW.OtOpcUa.Configuration
+@using ZB.MOM.WW.OtOpcUa.Configuration.Entities
+@using ZB.MOM.WW.OtOpcUa.Configuration.Enums
+@inject IDbContextFactory<OtOpcUaConfigDbContext> DbFactory
+@inject NavigationManager Nav
+@inject AuthenticationStateProvider AuthState
+
+<div class="d-flex justify-content-between align-items-center mb-3">
+    <h4 class="mb-0">New cluster</h4>
+    <a href="/clusters" class="btn btn-outline-secondary btn-sm">Cancel</a>
+</div>
+
+<EditForm Model="_form" OnValidSubmit="SubmitAsync" FormName="newCluster">
+    <DataAnnotationsValidator />
+    <section class="panel rise" style="animation-delay:.02s">
+        <div class="panel-head">Identity</div>
+        <div style="padding:1rem">
+            <div class="mb-3">
+                <label class="form-label" for="clusterId">Cluster ID</label>
+                <InputText id="clusterId" @bind-Value="_form.ClusterId" class="form-control form-control-sm mono"
+                           placeholder="LINE3-OPCUA" />
+            </div>
+            <div class="mb-3">
+                <label class="form-label" for="name">Name</label>
+                <InputText id="name" @bind-Value="_form.Name" class="form-control form-control-sm" />
+            </div>
+            <div class="row">
+                <div class="col-md-6 mb-3">
+                    <label class="form-label" for="enterprise">Enterprise</label>
+                    <InputText id="enterprise" @bind-Value="_form.Enterprise" class="form-control form-control-sm"
+                               placeholder="zb" />
+                </div>
+                <div class="col-md-6 mb-3">
+                    <label class="form-label" for="site">Site</label>
+                    <InputText id="site" @bind-Value="_form.Site" class="form-control form-control-sm"
+                               placeholder="warsaw-west" />
+                </div>
+            </div>
+        </div>
+    </section>
+
+    <section class="panel rise mt-3" style="animation-delay:.08s">
+        <div class="panel-head">Topology</div>
+        <div style="padding:1rem">
+            <div class="mb-3">
+                <label class="form-label" for="redundancy">Redundancy mode</label>
+                <InputSelect id="redundancy" @bind-Value="_form.RedundancyMode" class="form-select form-select-sm">
+                    <option value="@RedundancyMode.None">None (1 node)</option>
+                    <option value="@RedundancyMode.Warm">Warm (2 nodes, non-transparent)</option>
+                    <option value="@RedundancyMode.Hot">Hot (2 nodes, non-transparent)</option>
+                </InputSelect>
+                <div class="form-text">NodeCount is implied — 1 for None, 2 for Warm/Hot.</div>
+            </div>
+            <div class="mb-3">
+                <label class="form-label" for="notes">Notes</label>
+                <InputTextArea id="notes" @bind-Value="_form.Notes" class="form-control form-control-sm" rows="3" />
+            </div>
+        </div>
+    </section>
+
+    @if (!string.IsNullOrWhiteSpace(_error))
+    {
+        <div class="panel notice mt-3">@_error</div>
+    }
+
+    <div class="mt-3 d-flex gap-2">
+        <button type="submit" class="btn btn-primary" disabled="@_busy">
+            @if (_busy) { <span class="spinner-border spinner-border-sm me-1"></span> }
+            Create cluster
+        </button>
+        <a href="/clusters" class="btn btn-outline-secondary">Cancel</a>
+    </div>
+</EditForm>
+
+@code {
+    private FormModel _form = new();
+    private string? _error;
+    private bool _busy;
+
+    private async Task SubmitAsync()
+    {
+        _busy = true;
+        _error = null;
+        try
+        {
+            await using var db = await DbFactory.CreateDbContextAsync();
+            if (await db.ServerClusters.AnyAsync(c => c.ClusterId == _form.ClusterId))
+            {
+                _error = $"Cluster '{_form.ClusterId}' already exists.";
+                return;
+            }
+
+            var auth = await AuthState.GetAuthenticationStateAsync();
+            var createdBy = auth.User.Identity?.Name ?? "(anonymous)";
+
+            var entity = new ServerCluster
+            {
+                ClusterId = _form.ClusterId,
+                Name = _form.Name,
+                Enterprise = _form.Enterprise,
+                Site = _form.Site,
+                RedundancyMode = _form.RedundancyMode,
+                NodeCount = _form.RedundancyMode == RedundancyMode.None ? (byte)1 : (byte)2,
+                Notes = string.IsNullOrWhiteSpace(_form.Notes) ? null : _form.Notes,
+                Enabled = true,
+                CreatedAt = DateTime.UtcNow,
+                CreatedBy = createdBy,
+            };
+            db.ServerClusters.Add(entity);
+            await db.SaveChangesAsync();
+            Nav.NavigateTo($"/clusters/{entity.ClusterId}");
+        }
+        catch (Exception ex)
+        {
+            _error = ex.Message;
+        }
+        finally
+        {
+            _busy = false;
+        }
+    }
+
+    private sealed class FormModel
+    {
+        [System.ComponentModel.DataAnnotations.Required, System.ComponentModel.DataAnnotations.RegularExpression("^[A-Z0-9_-]+$", ErrorMessage = "Use uppercase letters, digits, dash, underscore.")]
+        public string ClusterId { get; set; } = "";
+        [System.ComponentModel.DataAnnotations.Required]
+        public string Name { get; set; } = "";
+        [System.ComponentModel.DataAnnotations.Required]
+        public string Enterprise { get; set; } = "zb";
+        [System.ComponentModel.DataAnnotations.Required]
+        public string Site { get; set; } = "";
+        public RedundancyMode RedundancyMode { get; set; } = RedundancyMode.None;
+        public string? Notes { get; set; }
+    }
+}