Add product image to powder inventory via AI lookup

When AI Lookup fetches a manufacturer product page, it now extracts the
og:image (Open Graph) meta tag before stripping HTML tags. The image URL
is returned in InventoryAiLookupResult.ImageUrl and automatically shown
as a preview on the Create/Edit form alongside the other filled fields.

The preview includes a Remove button to clear the image, and the Wrong
Match? button clears it along with the other AI-filled fields.

On the inventory Details page a product image card is rendered above the
Stock & Pricing card whenever ImageUrl is set. The field is nullable so
existing records and powders without an image are unaffected.

New field: InventoryItem.ImageUrl (nvarchar, nullable).
Migration: AddInventoryItemImageUrl.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/PowderCoating.Infrastructure/Migrations/20260429221217_AddInventoryItemImageUrl.cs

@@ -0,0 +1,71 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace PowderCoating.Infrastructure.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddInventoryItemImageUrl : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "ImageUrl",
+                table: "InventoryItems",
+                type: "nvarchar(max)",
+                nullable: true);
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 1,
+                column: "CreatedAt",
+                value: new DateTime(2026, 4, 29, 22, 12, 13, 993, DateTimeKind.Utc).AddTicks(9171));
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 2,
+                column: "CreatedAt",
+                value: new DateTime(2026, 4, 29, 22, 12, 13, 993, DateTimeKind.Utc).AddTicks(9177));
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 3,
+                column: "CreatedAt",
+                value: new DateTime(2026, 4, 29, 22, 12, 13, 993, DateTimeKind.Utc).AddTicks(9179));
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "ImageUrl",
+                table: "InventoryItems");
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 1,
+                column: "CreatedAt",
+                value: new DateTime(2026, 4, 29, 22, 0, 14, 747, DateTimeKind.Utc).AddTicks(4877));
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 2,
+                column: "CreatedAt",
+                value: new DateTime(2026, 4, 29, 22, 0, 14, 747, DateTimeKind.Utc).AddTicks(4884));
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 3,
+                column: "CreatedAt",
+                value: new DateTime(2026, 4, 29, 22, 0, 14, 747, DateTimeKind.Utc).AddTicks(4886));
+        }
+    }
+}

src/PowderCoating.Infrastructure/Migrations/ApplicationDbContextModelSnapshot.cs

@@ -3181,6 +3181,9 @@ namespace PowderCoating.Infrastructure.Migrations
                     b.Property<bool>("HasSamplePanel")
                         .HasColumnType("bit");
 
+                    b.Property<string>("ImageUrl")
+                        .HasColumnType("nvarchar(max)");
+
                     b.Property<int?>("InventoryAccountId")
                         .HasColumnType("int");
 
@@ -3732,6 +3735,9 @@ namespace PowderCoating.Infrastructure.Migrations
                     b.Property<int?>("QuoteId")
                         .HasColumnType("int");
 
+                    b.Property<DateTime?>("QuoteSnapshotUpdatedAt")
+                        .HasColumnType("datetime2");
+
                     b.Property<decimal>("QuotedPrice")
                         .HasColumnType("decimal(18,2)");
 
@@ -5860,7 +5866,7 @@ namespace PowderCoating.Infrastructure.Migrations
                         {
                             Id = 1,
                             CompanyId = 0,
-                            CreatedAt = new DateTime(2026, 4, 28, 16, 40, 22, 359, DateTimeKind.Utc).AddTicks(5055),
+                            CreatedAt = new DateTime(2026, 4, 29, 22, 12, 13, 993, DateTimeKind.Utc).AddTicks(9171),
                             Description = "Standard pricing for regular customers",
                             DiscountPercent = 0m,
                             IsActive = true,
@@ -5871,7 +5877,7 @@ namespace PowderCoating.Infrastructure.Migrations
                         {
                             Id = 2,
                             CompanyId = 0,
-                            CreatedAt = new DateTime(2026, 4, 28, 16, 40, 22, 359, DateTimeKind.Utc).AddTicks(5063),
+                            CreatedAt = new DateTime(2026, 4, 29, 22, 12, 13, 993, DateTimeKind.Utc).AddTicks(9177),
                             Description = "5% discount for preferred customers",
                             DiscountPercent = 5m,
                             IsActive = true,
@@ -5882,7 +5888,7 @@ namespace PowderCoating.Infrastructure.Migrations
                         {
                             Id = 3,
                             CompanyId = 0,
-                            CreatedAt = new DateTime(2026, 4, 28, 16, 40, 22, 359, DateTimeKind.Utc).AddTicks(5065),
+                            CreatedAt = new DateTime(2026, 4, 29, 22, 12, 13, 993, DateTimeKind.Utc).AddTicks(9179),
                             Description = "10% discount for premium customers",
                             DiscountPercent = 10m,
                             IsActive = true,