Add Project Name field to invoice create and edit forms

Stores ProjectName on the Invoice entity (previously only inherited from the
linked job at display time). Pre-fills from the job when creating from a job.
Migration: AddInvoiceProjectName.

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

src/PowderCoating.Infrastructure/Migrations/20260609124827_AddInvoiceProjectName.cs

@@ -0,0 +1,71 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace PowderCoating.Infrastructure.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddInvoiceProjectName : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "ProjectName",
+                table: "Invoices",
+                type: "nvarchar(max)",
+                nullable: true);
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 1,
+                column: "CreatedAt",
+                value: new DateTime(2026, 6, 9, 12, 48, 23, 21, DateTimeKind.Utc).AddTicks(2471));
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 2,
+                column: "CreatedAt",
+                value: new DateTime(2026, 6, 9, 12, 48, 23, 21, DateTimeKind.Utc).AddTicks(2477));
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 3,
+                column: "CreatedAt",
+                value: new DateTime(2026, 6, 9, 12, 48, 23, 21, DateTimeKind.Utc).AddTicks(2478));
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "ProjectName",
+                table: "Invoices");
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 1,
+                column: "CreatedAt",
+                value: new DateTime(2026, 6, 8, 18, 22, 3, 652, DateTimeKind.Utc).AddTicks(7640));
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 2,
+                column: "CreatedAt",
+                value: new DateTime(2026, 6, 8, 18, 22, 3, 652, DateTimeKind.Utc).AddTicks(7646));
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 3,
+                column: "CreatedAt",
+                value: new DateTime(2026, 6, 8, 18, 22, 3, 652, DateTimeKind.Utc).AddTicks(7647));
+        }
+    }
+}

src/PowderCoating.Infrastructure/Migrations/ApplicationDbContextModelSnapshot.cs

@@ -4269,6 +4269,9 @@ namespace PowderCoating.Infrastructure.Migrations
                     b.Property<string>("PreparedById")
                         .HasColumnType("nvarchar(450)");
 
+                    b.Property<string>("ProjectName")
+                        .HasColumnType("nvarchar(max)");
+
                     b.Property<string>("PublicViewToken")
                         .HasColumnType("nvarchar(max)");
 
@@ -7056,7 +7059,7 @@ namespace PowderCoating.Infrastructure.Migrations
                         {
                             Id = 1,
                             CompanyId = 0,
-                            CreatedAt = new DateTime(2026, 6, 8, 18, 22, 3, 652, DateTimeKind.Utc).AddTicks(7640),
+                            CreatedAt = new DateTime(2026, 6, 9, 12, 48, 23, 21, DateTimeKind.Utc).AddTicks(2471),
                             Description = "Standard pricing for regular customers",
                             DiscountPercent = 0m,
                             IsActive = true,
@@ -7067,7 +7070,7 @@ namespace PowderCoating.Infrastructure.Migrations
                         {
                             Id = 2,
                             CompanyId = 0,
-                            CreatedAt = new DateTime(2026, 6, 8, 18, 22, 3, 652, DateTimeKind.Utc).AddTicks(7646),
+                            CreatedAt = new DateTime(2026, 6, 9, 12, 48, 23, 21, DateTimeKind.Utc).AddTicks(2477),
                             Description = "5% discount for preferred customers",
                             DiscountPercent = 5m,
                             IsActive = true,
@@ -7078,7 +7081,7 @@ namespace PowderCoating.Infrastructure.Migrations
                         {
                             Id = 3,
                             CompanyId = 0,
-                            CreatedAt = new DateTime(2026, 6, 8, 18, 22, 3, 652, DateTimeKind.Utc).AddTicks(7647),
+                            CreatedAt = new DateTime(2026, 6, 9, 12, 48, 23, 21, DateTimeKind.Utc).AddTicks(2478),
                             Description = "10% discount for premium customers",
                             DiscountPercent = 10m,
                             IsActive = true,