Add rework pricing type (Fixed vs Per-Item) and inline rework flow on Job Details

Adds a PricingType enum to ReworkRecord (FixedPrice | PerItem), surfaces the
choice in the rework modal on Job Details, and wires the resulting unit/total
price display. Includes migration AddReworkPricingType, updated repository
query for rework history, and help article updates.

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

src/PowderCoating.Core/Entities/ReworkRecord.cs

@@ -31,6 +31,9 @@ public class ReworkRecord : BaseEntity
     public bool IsBillableToCustomer { get; set; }
     public string? BillingNotes { get; set; }
 
+    // Pricing attribution for the linked rework job (null on pre-existing records)
+    public ReworkPricingType? ReworkPricingType { get; set; }
+
     // ── Resolution ────────────────────────────────────────────────────────────
     public ReworkStatus Status { get; set; } = ReworkStatus.Open;
     public ReworkResolution? Resolution { get; set; }

src/PowderCoating.Core/Enums/Enums.cs

@@ -144,6 +144,14 @@ public enum ReworkResolution
     NoActionRequired = 4
 }
 
+/// <summary>Who bears the cost of the rework job, recorded at the time the rework is logged.</summary>
+public enum ReworkPricingType
+{
+    ShopFault = 0,        // Redo is on the shop — rework job items priced at $0
+    CustomerReduced = 1,  // Customer caused it; we're helping — prices copied, user edits
+    CustomerFull = 2      // Customer caused it; full original pricing applies
+}
+
 public enum BugReportStatus
 {
     New = 0,

src/PowderCoating.Core/Interfaces/Repositories/IJobRepository.cs

@@ -92,4 +92,10 @@ public interface IJobRepository : IRepository<Job>
     /// were never completed and rolled past their scheduled day.
     /// </summary>
     Task<List<Job>> GetOverdueScheduledJobsAsync();
+
+    /// <summary>
+    /// Returns the count of rework jobs linked to <paramref name="originalJobId"/>
+    /// (including soft-deleted) so the next rework suffix (R1, R2, …) can be determined.
+    /// </summary>
+    Task<int> GetReworkJobCountAsync(int originalJobId);
 }