feat: Add Stock Items UI and update Supplier offerings

- Add Stock Items index page listing all stock items
- Add Stock Items edit page with supplier offerings management
- Update Suppliers edit page to manage offerings (select from stock
  items instead of material+length)
- Add Stock Items navigation link to sidebar

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CutList.Web/Components/Layout/NavMenu.razor

@@ -23,6 +23,11 @@
                 <span class="bi bi-box-nav-menu" aria-hidden="true"></span> Materials
             </NavLink>
         </div>
+        <div class="nav-item px-3">
+            <NavLink class="nav-link" href="stock">
+                <span class="bi bi-boxes-nav-menu" aria-hidden="true"></span> Stock Items
+            </NavLink>
+        </div>
         <div class="nav-item px-3">
             <NavLink class="nav-link" href="suppliers">
                 <span class="bi bi-building-nav-menu" aria-hidden="true"></span> Suppliers

CutList.Web/Components/Pages/Stock/Edit.razor

@@ -0,0 +1,371 @@
+@page "/stock/new"
+@page "/stock/{Id:int}"
+@inject StockItemService StockItemService
+@inject MaterialService MaterialService
+@inject SupplierService SupplierService
+@inject NavigationManager Navigation
+@using CutList.Core.Formatting
+
+<PageTitle>@(IsNew ? "Add Stock Item" : "Edit Stock Item")</PageTitle>
+
+<h1>@(IsNew ? "Add Stock Item" : $"{stockItem.Material?.DisplayName} - {ArchUnits.FormatFromInches((double)stockItem.LengthInches)}")</h1>
+
+@if (loading)
+{
+    <p><em>Loading...</em></p>
+}
+else
+{
+    <div class="row">
+        <div class="col-lg-6 mb-4">
+            <div class="card">
+                <div class="card-header">
+                    <h5 class="mb-0">Stock Item Details</h5>
+                </div>
+                <div class="card-body">
+                    <EditForm Model="stockItem" OnValidSubmit="SaveStockItemAsync">
+                        <DataAnnotationsValidator />
+
+                        <div class="mb-3">
+                            <label class="form-label">Material</label>
+                            <select class="form-select" @bind="stockItem.MaterialId" disabled="@(!IsNew)">
+                                <option value="0">-- Select Material --</option>
+                                @foreach (var material in materials)
+                                {
+                                    <option value="@material.Id">@material.DisplayName</option>
+                                }
+                            </select>
+                        </div>
+
+                        <div class="mb-3">
+                            <label class="form-label">Length</label>
+                            @if (IsNew)
+                            {
+                                <LengthInput @bind-Value="stockItem.LengthInches" />
+                            }
+                            else
+                            {
+                                <input type="text" class="form-control" value="@ArchUnits.FormatFromInches((double)stockItem.LengthInches)" readonly />
+                            }
+                        </div>
+
+                        <div class="mb-3">
+                            <label class="form-label">Name (optional)</label>
+                            <InputText class="form-control" @bind-Value="stockItem.Name" placeholder="Custom display name" />
+                        </div>
+
+                        @if (!string.IsNullOrEmpty(errorMessage))
+                        {
+                            <div class="alert alert-danger">@errorMessage</div>
+                        }
+
+                        <div class="d-flex gap-2">
+                            <button type="submit" class="btn btn-primary" disabled="@saving">
+                                @if (saving)
+                                {
+                                    <span class="spinner-border spinner-border-sm me-1"></span>
+                                }
+                                @(IsNew ? "Create Stock Item" : "Save Changes")
+                            </button>
+                            <a href="stock" class="btn btn-outline-secondary">@(IsNew ? "Cancel" : "Back to List")</a>
+                        </div>
+                    </EditForm>
+                </div>
+            </div>
+        </div>
+
+        @if (!IsNew)
+        {
+            <div class="col-lg-6">
+                <div class="card">
+                    <div class="card-header d-flex justify-content-between align-items-center">
+                        <h5 class="mb-0">Supplier Offerings</h5>
+                        <button class="btn btn-sm btn-primary" @onclick="ShowAddOfferingForm">Add Offering</button>
+                    </div>
+                    <div class="card-body">
+                        @if (showOfferingForm)
+                        {
+                            <div class="border rounded p-3 mb-3 bg-light">
+                                <h6>@(editingOffering == null ? "Add Offering" : "Edit Offering")</h6>
+                                <div class="row g-2">
+                                    <div class="col-12">
+                                        <label class="form-label">Supplier</label>
+                                        <select class="form-select" @bind="newOffering.SupplierId">
+                                            <option value="0">-- Select Supplier --</option>
+                                            @foreach (var supplier in suppliers)
+                                            {
+                                                <option value="@supplier.Id">@supplier.Name</option>
+                                            }
+                                        </select>
+                                    </div>
+                                    <div class="col-md-6">
+                                        <label class="form-label">Part Number</label>
+                                        <InputText class="form-control" @bind-Value="newOffering.PartNumber" />
+                                    </div>
+                                    <div class="col-md-6">
+                                        <label class="form-label">Price</label>
+                                        <InputNumber class="form-control" @bind-Value="newOffering.Price" placeholder="0.00" />
+                                    </div>
+                                    <div class="col-12">
+                                        <label class="form-label">Supplier Description</label>
+                                        <InputText class="form-control" @bind-Value="newOffering.SupplierDescription" />
+                                    </div>
+                                    <div class="col-12">
+                                        <label class="form-label">Notes</label>
+                                        <InputText class="form-control" @bind-Value="newOffering.Notes" />
+                                    </div>
+                                </div>
+                                @if (!string.IsNullOrEmpty(offeringErrorMessage))
+                                {
+                                    <div class="alert alert-danger mt-2 mb-0">@offeringErrorMessage</div>
+                                }
+                                <div class="mt-3 d-flex gap-2">
+                                    <button class="btn btn-primary btn-sm" @onclick="SaveOfferingAsync" disabled="@savingOffering">
+                                        @if (savingOffering)
+                                        {
+                                            <span class="spinner-border spinner-border-sm me-1"></span>
+                                        }
+                                        @(editingOffering == null ? "Add" : "Save")
+                                    </button>
+                                    <button class="btn btn-outline-secondary btn-sm" @onclick="CancelOfferingForm">Cancel</button>
+                                </div>
+                            </div>
+                        }
+
+                        @if (offerings.Count == 0)
+                        {
+                            <p class="text-muted">No supplier offerings configured yet.</p>
+                        }
+                        else
+                        {
+                            <table class="table table-sm">
+                                <thead>
+                                    <tr>
+                                        <th>Supplier</th>
+                                        <th>Part #</th>
+                                        <th>Price</th>
+                                        <th style="width: 100px;">Actions</th>
+                                    </tr>
+                                </thead>
+                                <tbody>
+                                    @foreach (var offering in offerings)
+                                    {
+                                        <tr>
+                                            <td>@offering.Supplier.Name</td>
+                                            <td>@(offering.PartNumber ?? "-")</td>
+                                            <td>@(offering.Price.HasValue ? offering.Price.Value.ToString("C") : "-")</td>
+                                            <td>
+                                                <button class="btn btn-sm btn-outline-primary" @onclick="() => EditOffering(offering)">Edit</button>
+                                                <button class="btn btn-sm btn-outline-danger" @onclick="() => ConfirmDeleteOffering(offering)">Delete</button>
+                                            </td>
+                                        </tr>
+                                    }
+                                </tbody>
+                            </table>
+                        }
+                    </div>
+                </div>
+            </div>
+        }
+    </div>
+}
+
+<ConfirmDialog @ref="deleteOfferingDialog"
+               Title="Delete Offering"
+               Message="@deleteOfferingMessage"
+               ConfirmText="Delete"
+               OnConfirm="DeleteOfferingConfirmed" />
+
+@code {
+    [Parameter]
+    public int? Id { get; set; }
+
+    private StockItem stockItem = new();
+    private List<Material> materials = new();
+    private List<Supplier> suppliers = new();
+    private List<SupplierOffering> offerings = new();
+    private bool loading = true;
+    private bool saving;
+    private bool savingOffering;
+    private string? errorMessage;
+    private string? offeringErrorMessage;
+
+    private bool showOfferingForm;
+    private SupplierOffering newOffering = new();
+    private SupplierOffering? editingOffering;
+
+    private ConfirmDialog deleteOfferingDialog = null!;
+    private SupplierOffering? offeringToDelete;
+    private string deleteOfferingMessage = "";
+
+    private bool IsNew => !Id.HasValue;
+
+    protected override async Task OnInitializedAsync()
+    {
+        materials = await MaterialService.GetAllAsync();
+        suppliers = await SupplierService.GetAllAsync();
+
+        if (Id.HasValue)
+        {
+            var existing = await StockItemService.GetByIdAsync(Id.Value);
+            if (existing == null)
+            {
+                Navigation.NavigateTo("stock");
+                return;
+            }
+            stockItem = existing;
+            offerings = existing.SupplierOfferings.Where(o => o.IsActive).ToList();
+        }
+        loading = false;
+    }
+
+    private async Task SaveStockItemAsync()
+    {
+        errorMessage = null;
+        saving = true;
+
+        try
+        {
+            if (stockItem.MaterialId == 0)
+            {
+                errorMessage = "Please select a material";
+                return;
+            }
+
+            if (stockItem.LengthInches <= 0)
+            {
+                errorMessage = "Length must be greater than zero";
+                return;
+            }
+
+            var exists = await StockItemService.ExistsAsync(
+                stockItem.MaterialId,
+                stockItem.LengthInches,
+                IsNew ? null : stockItem.Id);
+
+            if (exists)
+            {
+                errorMessage = "A stock item with this material and length already exists";
+                return;
+            }
+
+            if (IsNew)
+            {
+                var created = await StockItemService.CreateAsync(stockItem);
+                Navigation.NavigateTo($"stock/{created.Id}");
+            }
+            else
+            {
+                await StockItemService.UpdateAsync(stockItem);
+            }
+        }
+        finally
+        {
+            saving = false;
+        }
+    }
+
+    private void ShowAddOfferingForm()
+    {
+        editingOffering = null;
+        newOffering = new SupplierOffering { StockItemId = Id!.Value };
+        showOfferingForm = true;
+        offeringErrorMessage = null;
+    }
+
+    private void EditOffering(SupplierOffering offering)
+    {
+        editingOffering = offering;
+        newOffering = new SupplierOffering
+        {
+            Id = offering.Id,
+            StockItemId = offering.StockItemId,
+            SupplierId = offering.SupplierId,
+            PartNumber = offering.PartNumber,
+            SupplierDescription = offering.SupplierDescription,
+            Price = offering.Price,
+            Notes = offering.Notes
+        };
+        showOfferingForm = true;
+        offeringErrorMessage = null;
+    }
+
+    private void CancelOfferingForm()
+    {
+        showOfferingForm = false;
+        editingOffering = null;
+        offeringErrorMessage = null;
+    }
+
+    private async Task SaveOfferingAsync()
+    {
+        offeringErrorMessage = null;
+        savingOffering = true;
+
+        try
+        {
+            if (newOffering.SupplierId == 0)
+            {
+                offeringErrorMessage = "Please select a supplier";
+                return;
+            }
+
+            var exists = await SupplierService.OfferingExistsAsync(
+                newOffering.SupplierId,
+                newOffering.StockItemId,
+                editingOffering?.Id);
+
+            if (exists)
+            {
+                offeringErrorMessage = "This supplier already has an offering for this stock item";
+                return;
+            }
+
+            if (editingOffering == null)
+            {
+                await SupplierService.AddOfferingAsync(newOffering);
+            }
+            else
+            {
+                await SupplierService.UpdateOfferingAsync(newOffering);
+            }
+
+            // Refresh the stock item to get updated offerings
+            var updated = await StockItemService.GetByIdAsync(Id!.Value);
+            if (updated != null)
+            {
+                stockItem = updated;
+                offerings = updated.SupplierOfferings.Where(o => o.IsActive).ToList();
+            }
+            showOfferingForm = false;
+            editingOffering = null;
+        }
+        finally
+        {
+            savingOffering = false;
+        }
+    }
+
+    private void ConfirmDeleteOffering(SupplierOffering offering)
+    {
+        offeringToDelete = offering;
+        deleteOfferingMessage = $"Are you sure you want to delete the offering from {offering.Supplier.Name}?";
+        deleteOfferingDialog.Show();
+    }
+
+    private async Task DeleteOfferingConfirmed()
+    {
+        if (offeringToDelete != null)
+        {
+            await SupplierService.DeleteOfferingAsync(offeringToDelete.Id);
+
+            // Refresh the stock item to get updated offerings
+            var updated = await StockItemService.GetByIdAsync(Id!.Value);
+            if (updated != null)
+            {
+                stockItem = updated;
+                offerings = updated.SupplierOfferings.Where(o => o.IsActive).ToList();
+            }
+        }
+    }
+}

CutList.Web/Components/Pages/Stock/Index.razor

@@ -0,0 +1,85 @@
+@page "/stock"
+@inject StockItemService StockItemService
+@inject NavigationManager Navigation
+@using CutList.Core.Formatting
+
+<PageTitle>Stock Items</PageTitle>
+
+<div class="d-flex justify-content-between align-items-center mb-3">
+    <h1>Stock Items</h1>
+    <a href="stock/new" class="btn btn-primary">Add Stock Item</a>
+</div>
+
+@if (loading)
+{
+    <p><em>Loading...</em></p>
+}
+else if (stockItems.Count == 0)
+{
+    <div class="alert alert-info">
+        No stock items found. <a href="stock/new">Add your first stock item</a>.
+    </div>
+}
+else
+{
+    <table class="table table-striped table-hover">
+        <thead>
+            <tr>
+                <th>Material</th>
+                <th>Length</th>
+                <th>Name</th>
+                <th style="width: 120px;">Actions</th>
+            </tr>
+        </thead>
+        <tbody>
+            @foreach (var item in stockItems)
+            {
+                <tr>
+                    <td>@item.Material.DisplayName</td>
+                    <td>@ArchUnits.FormatFromInches((double)item.LengthInches)</td>
+                    <td>@(item.Name ?? "-")</td>
+                    <td>
+                        <a href="stock/@item.Id" class="btn btn-sm btn-outline-primary">Edit</a>
+                        <button class="btn btn-sm btn-outline-danger" @onclick="() => ConfirmDelete(item)">Delete</button>
+                    </td>
+                </tr>
+            }
+        </tbody>
+    </table>
+}
+
+<ConfirmDialog @ref="deleteDialog"
+               Title="Delete Stock Item"
+               Message="@deleteMessage"
+               ConfirmText="Delete"
+               OnConfirm="DeleteConfirmed" />
+
+@code {
+    private List<StockItem> stockItems = new();
+    private bool loading = true;
+    private ConfirmDialog deleteDialog = null!;
+    private StockItem? itemToDelete;
+    private string deleteMessage = "";
+
+    protected override async Task OnInitializedAsync()
+    {
+        stockItems = await StockItemService.GetAllAsync();
+        loading = false;
+    }
+
+    private void ConfirmDelete(StockItem item)
+    {
+        itemToDelete = item;
+        deleteMessage = $"Are you sure you want to delete \"{item.Material.DisplayName} - {ArchUnits.FormatFromInches((double)item.LengthInches)}\"?";
+        deleteDialog.Show();
+    }
+
+    private async Task DeleteConfirmed()
+    {
+        if (itemToDelete != null)
+        {
+            await StockItemService.DeleteAsync(itemToDelete.Id);
+            stockItems = await StockItemService.GetAllAsync();
+        }
+    }
+}

CutList.Web/Components/Pages/Suppliers/Edit.razor

@@ -1,9 +1,10 @@
 @page "/suppliers/new"
 @page "/suppliers/{Id:int}"
 @inject SupplierService SupplierService
-@inject MaterialService MaterialService
 @inject NavigationManager Navigation
+@inject CutList.Web.Data.ApplicationDbContext DbContext
 @using CutList.Core.Formatting
+@using Microsoft.EntityFrameworkCore
 
 <PageTitle>@(IsNew ? "Add Supplier" : "Edit Supplier")</PageTitle>
 
@@ -66,80 +67,84 @@ else
             <div class="col-lg-6">
                 <div class="card">
                     <div class="card-header d-flex justify-content-between align-items-center">
-                        <h5 class="mb-0">Stock Lengths</h5>
+                        <h5 class="mb-0">Supplier Offerings</h5>
-                        <button class="btn btn-sm btn-primary" @onclick="ShowAddStockForm">Add Stock</button>
+                        <button class="btn btn-sm btn-primary" @onclick="ShowAddOfferingForm">Add Offering</button>
                     </div>
                     <div class="card-body">
-                        @if (showStockForm)
+                        @if (showOfferingForm)
                         {
                             <div class="border rounded p-3 mb-3 bg-light">
-                                <h6>@(editingStock == null ? "Add Stock Length" : "Edit Stock Length")</h6>
+                                <h6>@(editingOffering == null ? "Add Offering" : "Edit Offering")</h6>
                                 <div class="row g-2">
-                                    <div class="col-md-6">
+                                    <div class="col-12">
-                                        <label class="form-label">Material</label>
+                                        <label class="form-label">Stock Item</label>
-                                        <select class="form-select" @bind="newStock.MaterialId">
+                                        <select class="form-select" @bind="newOffering.StockItemId">
-                                            <option value="0">-- Select Material --</option>
+                                            <option value="0">-- Select Stock Item --</option>
-                                            @foreach (var material in materials)
+                                            @foreach (var stockItem in stockItems)
                                             {
-                                                <option value="@material.Id">@material.DisplayName</option>
+                                                <option value="@stockItem.Id">@stockItem.Material.DisplayName - @ArchUnits.FormatFromInches((double)stockItem.LengthInches)</option>
                                             }
                                         </select>
                                     </div>
                                     <div class="col-md-6">
-                                        <label class="form-label">Length</label>
+                                        <label class="form-label">Part Number</label>
-                                        <LengthInput @bind-Value="newStock.LengthInches" />
+                                        <InputText class="form-control" @bind-Value="newOffering.PartNumber" />
                                     </div>
                                     <div class="col-md-6">
-                                        <label class="form-label">Price (optional)</label>
+                                        <label class="form-label">Price</label>
-                                        <InputNumber class="form-control" @bind-Value="newStock.Price" placeholder="0.00" />
+                                        <InputNumber class="form-control" @bind-Value="newOffering.Price" placeholder="0.00" />
                                     </div>
-                                    <div class="col-md-6">
+                                    <div class="col-12">
+                                        <label class="form-label">Supplier Description</label>
+                                        <InputText class="form-control" @bind-Value="newOffering.SupplierDescription" />
+                                    </div>
+                                    <div class="col-12">
                                         <label class="form-label">Notes</label>
-                                        <InputText class="form-control" @bind-Value="newStock.Notes" />
+                                        <InputText class="form-control" @bind-Value="newOffering.Notes" />
                                     </div>
                                 </div>
-                                @if (!string.IsNullOrEmpty(stockErrorMessage))
+                                @if (!string.IsNullOrEmpty(offeringErrorMessage))
                                 {
-                                    <div class="alert alert-danger mt-2 mb-0">@stockErrorMessage</div>
+                                    <div class="alert alert-danger mt-2 mb-0">@offeringErrorMessage</div>
                                 }
                                 <div class="mt-3 d-flex gap-2">
-                                    <button class="btn btn-primary btn-sm" @onclick="SaveStockAsync" disabled="@savingStock">
+                                    <button class="btn btn-primary btn-sm" @onclick="SaveOfferingAsync" disabled="@savingOffering">
-                                        @if (savingStock)
+                                        @if (savingOffering)
                                         {
                                             <span class="spinner-border spinner-border-sm me-1"></span>
                                         }
-                                        @(editingStock == null ? "Add" : "Save")
+                                        @(editingOffering == null ? "Add" : "Save")
                                     </button>
-                                    <button class="btn btn-outline-secondary btn-sm" @onclick="CancelStockForm">Cancel</button>
+                                    <button class="btn btn-outline-secondary btn-sm" @onclick="CancelOfferingForm">Cancel</button>
                                 </div>
                             </div>
                         }
 
-                        @if (stocks.Count == 0)
+                        @if (offerings.Count == 0)
                         {
-                            <p class="text-muted">No stock lengths configured yet.</p>
+                            <p class="text-muted">No offerings configured yet.</p>
                         }
                         else
                         {
                             <table class="table table-sm">
                                 <thead>
                                     <tr>
-                                        <th>Material</th>
+                                        <th>Stock Item</th>
-                                        <th>Length</th>
+                                        <th>Part #</th>
                                         <th>Price</th>
                                         <th style="width: 100px;">Actions</th>
                                     </tr>
                                 </thead>
                                 <tbody>
-                                    @foreach (var stock in stocks)
+                                    @foreach (var offering in offerings)
                                     {
                                         <tr>
-                                            <td>@stock.Material.DisplayName</td>
+                                            <td>@offering.StockItem.Material.DisplayName - @ArchUnits.FormatFromInches((double)offering.StockItem.LengthInches)</td>
-                                            <td>@ArchUnits.FormatFromInches((double)stock.LengthInches)</td>
+                                            <td>@(offering.PartNumber ?? "-")</td>
-                                            <td>@(stock.Price.HasValue ? stock.Price.Value.ToString("C") : "-")</td>
+                                            <td>@(offering.Price.HasValue ? offering.Price.Value.ToString("C") : "-")</td>
                                             <td>
-                                                <button class="btn btn-sm btn-outline-primary" @onclick="() => EditStock(stock)">Edit</button>
+                                                <button class="btn btn-sm btn-outline-primary" @onclick="() => EditOffering(offering)">Edit</button>
-                                                <button class="btn btn-sm btn-outline-danger" @onclick="() => ConfirmDeleteStock(stock)">Delete</button>
+                                                <button class="btn btn-sm btn-outline-danger" @onclick="() => ConfirmDeleteOffering(offering)">Delete</button>
                                             </td>
                                         </tr>
                                     }
@@ -153,38 +158,44 @@ else
     </div>
 }
 
-<ConfirmDialog @ref="deleteStockDialog"
+<ConfirmDialog @ref="deleteOfferingDialog"
-               Title="Delete Stock Length"
+               Title="Delete Offering"
-               Message="@deleteStockMessage"
+               Message="@deleteOfferingMessage"
                ConfirmText="Delete"
-               OnConfirm="DeleteStockConfirmed" />
+               OnConfirm="DeleteOfferingConfirmed" />
 
 @code {
     [Parameter]
     public int? Id { get; set; }
 
     private Supplier supplier = new();
-    private List<SupplierStock> stocks = new();
+    private List<SupplierOffering> offerings = new();
-    private List<Material> materials = new();
+    private List<StockItem> stockItems = new();
     private bool loading = true;
     private bool savingSupplier;
-    private bool savingStock;
+    private bool savingOffering;
     private string? supplierErrorMessage;
-    private string? stockErrorMessage;
+    private string? offeringErrorMessage;
 
-    private bool showStockForm;
+    private bool showOfferingForm;
-    private SupplierStock newStock = new();
+    private SupplierOffering newOffering = new();
-    private SupplierStock? editingStock;
+    private SupplierOffering? editingOffering;
 
-    private ConfirmDialog deleteStockDialog = null!;
+    private ConfirmDialog deleteOfferingDialog = null!;
-    private SupplierStock? stockToDelete;
+    private SupplierOffering? offeringToDelete;
-    private string deleteStockMessage = "";
+    private string deleteOfferingMessage = "";
 
     private bool IsNew => !Id.HasValue;
 
     protected override async Task OnInitializedAsync()
     {
-        materials = await MaterialService.GetAllAsync();
+        stockItems = await DbContext.StockItems
+            .Include(si => si.Material)
+            .Where(si => si.IsActive)
+            .OrderBy(si => si.Material.Shape)
+            .ThenBy(si => si.Material.Size)
+            .ThenBy(si => si.LengthInches)
+            .ToListAsync();
 
         if (Id.HasValue)
         {
@@ -195,7 +206,7 @@ else
                 return;
             }
             supplier = existing;
-            stocks = await SupplierService.GetStocksForSupplierAsync(Id.Value);
+            offerings = await SupplierService.GetOfferingsForSupplierAsync(Id.Value);
         }
         loading = false;
     }
@@ -229,100 +240,94 @@ else
         }
     }
 
-    private void ShowAddStockForm()
+    private void ShowAddOfferingForm()
     {
-        editingStock = null;
+        editingOffering = null;
-        newStock = new SupplierStock { SupplierId = Id!.Value };
+        newOffering = new SupplierOffering { SupplierId = Id!.Value };
-        showStockForm = true;
+        showOfferingForm = true;
-        stockErrorMessage = null;
+        offeringErrorMessage = null;
     }
 
-    private void EditStock(SupplierStock stock)
+    private void EditOffering(SupplierOffering offering)
     {
-        editingStock = stock;
+        editingOffering = offering;
-        newStock = new SupplierStock
+        newOffering = new SupplierOffering
         {
-            Id = stock.Id,
+            Id = offering.Id,
-            SupplierId = stock.SupplierId,
+            SupplierId = offering.SupplierId,
-            MaterialId = stock.MaterialId,
+            StockItemId = offering.StockItemId,
-            LengthInches = stock.LengthInches,
+            PartNumber = offering.PartNumber,
-            Price = stock.Price,
+            SupplierDescription = offering.SupplierDescription,
-            Notes = stock.Notes
+            Price = offering.Price,
+            Notes = offering.Notes
         };
-        showStockForm = true;
+        showOfferingForm = true;
-        stockErrorMessage = null;
+        offeringErrorMessage = null;
     }
 
-    private void CancelStockForm()
+    private void CancelOfferingForm()
     {
-        showStockForm = false;
+        showOfferingForm = false;
-        editingStock = null;
+        editingOffering = null;
-        stockErrorMessage = null;
+        offeringErrorMessage = null;
     }
 
-    private async Task SaveStockAsync()
+    private async Task SaveOfferingAsync()
     {
-        stockErrorMessage = null;
+        offeringErrorMessage = null;
-        savingStock = true;
+        savingOffering = true;
 
         try
         {
-            if (newStock.MaterialId == 0)
+            if (newOffering.StockItemId == 0)
             {
-                stockErrorMessage = "Please select a material";
+                offeringErrorMessage = "Please select a stock item";
                 return;
             }
 
-            if (newStock.LengthInches <= 0)
+            var exists = await SupplierService.OfferingExistsAsync(
-            {
+                newOffering.SupplierId,
-                stockErrorMessage = "Length must be greater than zero";
+                newOffering.StockItemId,
-                return;
+                editingOffering?.Id);
-            }
-
-            var exists = await SupplierService.StockExistsAsync(
-                newStock.SupplierId,
-                newStock.MaterialId,
-                newStock.LengthInches,
-                editingStock?.Id);
 
             if (exists)
             {
-                stockErrorMessage = "This stock length already exists for this material";
+                offeringErrorMessage = "This supplier already has an offering for this stock item";
                 return;
             }
 
-            if (editingStock == null)
+            if (editingOffering == null)
             {
-                await SupplierService.AddStockAsync(newStock);
+                await SupplierService.AddOfferingAsync(newOffering);
             }
             else
             {
-                await SupplierService.UpdateStockAsync(newStock);
+                await SupplierService.UpdateOfferingAsync(newOffering);
             }
 
-            stocks = await SupplierService.GetStocksForSupplierAsync(Id!.Value);
+            offerings = await SupplierService.GetOfferingsForSupplierAsync(Id!.Value);
-            showStockForm = false;
+            showOfferingForm = false;
-            editingStock = null;
+            editingOffering = null;
         }
         finally
         {
-            savingStock = false;
+            savingOffering = false;
         }
     }
 
-    private void ConfirmDeleteStock(SupplierStock stock)
+    private void ConfirmDeleteOffering(SupplierOffering offering)
     {
-        stockToDelete = stock;
+        offeringToDelete = offering;
-        deleteStockMessage = $"Are you sure you want to delete the {ArchUnits.FormatFromInches((double)stock.LengthInches)} stock length?";
+        deleteOfferingMessage = $"Are you sure you want to delete the offering for {offering.StockItem.Material.DisplayName} - {ArchUnits.FormatFromInches((double)offering.StockItem.LengthInches)}?";
-        deleteStockDialog.Show();
+        deleteOfferingDialog.Show();
     }
 
-    private async Task DeleteStockConfirmed()
+    private async Task DeleteOfferingConfirmed()
     {
-        if (stockToDelete != null)
+        if (offeringToDelete != null)
         {
-            await SupplierService.DeleteStockAsync(stockToDelete.Id);
+            await SupplierService.DeleteOfferingAsync(offeringToDelete.Id);
-            stocks = await SupplierService.GetStocksForSupplierAsync(Id!.Value);
+            offerings = await SupplierService.GetOfferingsForSupplierAsync(Id!.Value);
         }
     }
 }