Add Formula Library ratings, Job Profitability report, and Quote Revision History improvements

- Formula Library ratings: thumbs up/down per company per formula; toggle on/off; sorts by net score; own formulas not rateable; FormulaLibraryRating entity + migration AddFormulaLibraryRatings
- Job Profitability report: actual labor cost (logged hours x StandardLaborRate) vs powder cost vs billed price per job; gross margin % color-coded; time-tracked-only filter; totals footer
- Quote Revision History: track Total price changes on every save; log Sent/Resent events with recipient email; replace flat table with grouped timeline UI (icons per event type, total-change badge on header)
- Setup Wizard: cap CompletedCount at TotalSteps so old 10-step data no longer shows 10/5
- Formula Library card: fix badge overflow on long titles; add Rate: label to make voting buttons discoverable
- Help docs and AI knowledge base updated for all three features

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

src/PowderCoating.Infrastructure/Migrations/ApplicationDbContextModelSnapshot.cs

@@ -3593,6 +3593,35 @@ namespace PowderCoating.Infrastructure.Migrations
                     b.ToTable("FormulaLibraryItems");
                 });
 
+            modelBuilder.Entity("PowderCoating.Core.Entities.FormulaLibraryRating", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("CompanyId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("FormulaLibraryItemId")
+                        .HasColumnType("int");
+
+                    b.Property<bool>("IsPositive")
+                        .HasColumnType("bit");
+
+                    b.Property<DateTime>("RatedAt")
+                        .HasColumnType("datetime2");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("FormulaLibraryItemId", "CompanyId")
+                        .IsUnique()
+                        .HasDatabaseName("IX_FormulaLibraryRatings_Item_Company");
+
+                    b.ToTable("FormulaLibraryRatings");
+                });
+
             modelBuilder.Entity("PowderCoating.Core.Entities.GiftCertificate", b =>
                 {
                     b.Property<int>("Id")
@@ -7024,7 +7053,7 @@ namespace PowderCoating.Infrastructure.Migrations
                         {
                             Id = 1,
                             CompanyId = 0,
-                            CreatedAt = new DateTime(2026, 5, 28, 1, 1, 15, 582, DateTimeKind.Utc).AddTicks(3849),
+                            CreatedAt = new DateTime(2026, 6, 1, 12, 29, 35, 841, DateTimeKind.Utc).AddTicks(9377),
                             Description = "Standard pricing for regular customers",
                             DiscountPercent = 0m,
                             IsActive = true,
@@ -7035,7 +7064,7 @@ namespace PowderCoating.Infrastructure.Migrations
                         {
                             Id = 2,
                             CompanyId = 0,
-                            CreatedAt = new DateTime(2026, 5, 28, 1, 1, 15, 582, DateTimeKind.Utc).AddTicks(3855),
+                            CreatedAt = new DateTime(2026, 6, 1, 12, 29, 35, 841, DateTimeKind.Utc).AddTicks(9381),
                             Description = "5% discount for preferred customers",
                             DiscountPercent = 5m,
                             IsActive = true,
@@ -7046,7 +7075,7 @@ namespace PowderCoating.Infrastructure.Migrations
                         {
                             Id = 3,
                             CompanyId = 0,
-                            CreatedAt = new DateTime(2026, 5, 28, 1, 1, 15, 582, DateTimeKind.Utc).AddTicks(3856),
+                            CreatedAt = new DateTime(2026, 6, 1, 12, 29, 35, 841, DateTimeKind.Utc).AddTicks(9382),
                             Description = "10% discount for premium customers",
                             DiscountPercent = 10m,
                             IsActive = true,
@@ -9614,6 +9643,17 @@ namespace PowderCoating.Infrastructure.Migrations
                     b.Navigation("InspiredBy");
                 });
 
+            modelBuilder.Entity("PowderCoating.Core.Entities.FormulaLibraryRating", b =>
+                {
+                    b.HasOne("PowderCoating.Core.Entities.FormulaLibraryItem", "FormulaLibraryItem")
+                        .WithMany()
+                        .HasForeignKey("FormulaLibraryItemId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("FormulaLibraryItem");
+                });
+
             modelBuilder.Entity("PowderCoating.Core.Entities.GiftCertificate", b =>
                 {
                     b.HasOne("PowderCoating.Core.Entities.ApplicationUser", "IssuedBy")