Remove ShopWorker entity and migrate worker identity to ApplicationUser

Removes the ShopWorker and ShopWorkerRoleCost entities, all related DTOs,
mappings, controllers, views, and import/export paths. Worker identity is
now handled entirely through ApplicationUser with per-user LaborCostPerHour.
ShopWorkerRoleCosts table remains in production pending manual data migration.

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

src/PowderCoating.Core/Entities/ApplicationUser.cs

@@ -58,7 +58,14 @@ public class ApplicationUser : IdentityUser
 
     public string? SidebarColor { get; set; } = "ocean";
     public string? Notes { get; set; }
-    
+
+    /// <summary>
+    /// Per-worker labor cost per hour used for job costing profit/margin calculations.
+    /// Overrides the company-level LaborCostPerHour when set.
+    /// Leave null to use the company default.
+    /// </summary>
+    public decimal? LaborCostPerHour { get; set; }
+
     public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
     public DateTime? UpdatedAt { get; set; }
     public DateTime? LastLoginDate { get; set; }

src/PowderCoating.Core/Entities/Company.cs

@@ -141,8 +141,7 @@ public class Company : BaseEntity
     public virtual ICollection<Quote> Quotes { get; set; } = new List<Quote>();
     public virtual ICollection<InventoryItem> InventoryItems { get; set; } = new List<InventoryItem>();
     public virtual ICollection<Vendor> Vendors { get; set; } = new List<Vendor>();
-    public virtual ICollection<ShopWorker> ShopWorkers { get; set; } = new List<ShopWorker>();
-    public virtual ICollection<PricingTier> PricingTiers { get; set; } = new List<PricingTier>();
+public virtual ICollection<PricingTier> PricingTiers { get; set; } = new List<PricingTier>();
     public virtual CompanyOperatingCosts? OperatingCosts { get; set; }
     public virtual CompanyPreferences? Preferences { get; set; }
 }

src/PowderCoating.Core/Entities/CompanyOperatingCosts.cs

@@ -13,6 +13,14 @@ namespace PowderCoating.Core.Entities
         [Range(0, 10000)]
         public decimal StandardLaborRate { get; set; }
 
+        /// <summary>
+        /// Actual labor cost per hour (wages + burden) used exclusively for internal job costing and profit/margin display.
+        /// This is NOT the billing rate — it should reflect what you actually pay workers.
+        /// When null, the costing engine defaults to 20% of StandardLaborRate.
+        /// </summary>
+        [Range(0, 10000)]
+        public decimal? LaborCostPerHour { get; set; }
+
         // Additional Coat Labor Percentage (percentage of base labor for each additional coat beyond the first)
         [Range(0, 100)]
         public decimal AdditionalCoatLaborPercent { get; set; } = 30m;

src/PowderCoating.Core/Entities/JobTimeEntry.cs

@@ -3,7 +3,6 @@ namespace PowderCoating.Core.Entities;
 public class JobTimeEntry : BaseEntity
 {
     public int JobId { get; set; }
-    public int? ShopWorkerId { get; set; }       // legacy — kept for entries created before user migration
     public string? UserId { get; set; }           // FK to AspNetUsers
     public string? UserDisplayName { get; set; }  // snapshot of worker name at entry creation time
     public DateTime WorkDate { get; set; }
@@ -13,5 +12,4 @@ public class JobTimeEntry : BaseEntity
 
     // Navigation
     public virtual Job Job { get; set; } = null!;
-    public virtual ShopWorker? Worker { get; set; }  // nullable — only populated for legacy entries
 }

src/PowderCoating.Core/Entities/ShopWorker.cs

@@ -1,18 +0,0 @@
-using PowderCoating.Core.Enums;
-
-namespace PowderCoating.Core.Entities;
-
-public class ShopWorker : BaseEntity
-{
-    public string Name { get; set; } = string.Empty;
-    public ShopWorkerRole Role { get; set; } = ShopWorkerRole.GeneralLabor;
-    public string? Phone { get; set; }
-    public string? Email { get; set; }
-    public bool IsActive { get; set; } = true;
-    public string? Notes { get; set; }
-
-    // Relationships
-    public virtual ICollection<Job> AssignedJobs { get; set; } = new List<Job>();
-    public virtual ICollection<MaintenanceRecord> AssignedMaintenanceTasks { get; set; } = new List<MaintenanceRecord>();
-    public virtual ICollection<JobTimeEntry> TimeEntries { get; set; } = new List<JobTimeEntry>();
-}

src/PowderCoating.Core/Entities/ShopWorkerRoleCost.cs

@@ -1,15 +0,0 @@
-using PowderCoating.Core.Enums;
-
-namespace PowderCoating.Core.Entities;
-
-/// <summary>
-/// Optional per-role labor cost rate for job costing / profitability calculations.
-/// If no rate is set for a role, the company's StandardLaborRate is used as fallback.
-/// </summary>
-public class ShopWorkerRoleCost : BaseEntity
-{
-    public ShopWorkerRole Role { get; set; }
-
-    /// <summary>Cost (pay rate) per hour for this role — used in job costing, NOT billing.</summary>
-    public decimal HourlyRate { get; set; }
-}