Sweep all .cshtml files for encoding corruption; add pre-commit guard

Replace all corruption variants with HTML entities across 226 view files:
- 3-char UTF-8-as-Win1252 sequences (ae-corruption)
- Standalone smart/curly quotes that break C# Razor expressions
- Partially re-corrupted variants where the 3rd byte was normalised to ASCII

tools/Fix-Encoding.ps1: re-runnable sweep; uses [char] code points so the
script itself never contains a literal non-ASCII character; supports -DryRun

.githooks/pre-commit: blocks commits containing the ae-corruption byte
signature (xc3xa2xe2x82xac); git core.hooksPath = .githooks so the
hook is repo-committed and active for all future work on this machine.

Build clean; 225 unit tests pass.

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

src/PowderCoating.Web/Views/Maintenance/Create.cshtml

@@ -1,4 +1,4 @@
-@model PowderCoating.Application.DTOs.Maintenance.CreateMaintenanceDto
+@model PowderCoating.Application.DTOs.Maintenance.CreateMaintenanceDto
 
 @{
     ViewData["Title"] = "Schedule Maintenance";
@@ -30,7 +30,7 @@
                             <a tabindex="0" class="help-icon" role="button"
                                data-bs-toggle="popover" data-bs-placement="right" data-bs-trigger="focus"
                                data-bs-title="Basic Information"
-                               data-bs-content="Select the equipment this service applies to. Maintenance Type is a free-text label like Preventive, Repair, or Inspection. Status: Scheduled = planned, In Progress = underway, Completed = finished. Priority: Low / Normal / High / Critical — Critical and High priorities are highlighted in the list view and on the equipment status banner.">
+                               data-bs-content="Select the equipment this service applies to. Maintenance Type is a free-text label like Preventive, Repair, or Inspection. Status: Scheduled = planned, In Progress = underway, Completed = finished. Priority: Low / Normal / High / Critical &mdash; Critical and High priorities are highlighted in the list view and on the equipment status banner.">
                                 <i class="bi bi-question-circle"></i>
                             </a>
                         </div>

src/PowderCoating.Web/Views/Maintenance/Delete.cshtml

@@ -1,4 +1,4 @@
-@model PowderCoating.Application.DTOs.Maintenance.MaintenanceRecordDto
+@model PowderCoating.Application.DTOs.Maintenance.MaintenanceRecordDto
 
 @{
     ViewData["Title"] = "Delete Maintenance Record";
@@ -22,7 +22,7 @@
         <div class="card border-0 shadow-sm mb-4">
             <div class="card-header bg-danger bg-opacity-10 border-0 py-3">
                 <h5 class="mb-0 text-danger">
-                    <i class="bi bi-wrench me-2"></i>@Model.MaintenanceType — @Model.EquipmentName
+                    <i class="bi bi-wrench me-2"></i>@Model.MaintenanceType &mdash; @Model.EquipmentName
                 </h5>
             </div>
             <div class="card-body">

src/PowderCoating.Web/Views/Maintenance/Details.cshtml

@@ -56,7 +56,7 @@
                 {
                     <span class="ms-3">
                         <span class="badge bg-info text-dark">
-                            <i class="bi bi-arrow-repeat me-1"></i>Recurring — @Model.RecurrenceFrequency
+                            <i class="bi bi-arrow-repeat me-1"></i>Recurring &mdash; @Model.RecurrenceFrequency
                         </span>
                         @if (Model.RecurrenceEndDate.HasValue)
                         {

src/PowderCoating.Web/Views/Maintenance/Edit.cshtml

@@ -1,4 +1,4 @@
-@model PowderCoating.Application.DTOs.Maintenance.UpdateMaintenanceDto
+@model PowderCoating.Application.DTOs.Maintenance.UpdateMaintenanceDto
 
 @{
     ViewData["Title"] = "Edit Maintenance";
@@ -31,7 +31,7 @@
                             <a tabindex="0" class="help-icon" role="button"
                                data-bs-toggle="popover" data-bs-placement="right" data-bs-trigger="focus"
                                data-bs-title="Basic Information"
-                               data-bs-content="Select the equipment this service applies to. Maintenance Type is a free-text label like Preventive, Repair, or Inspection. Status: Scheduled = planned, In Progress = underway, Completed = finished. Priority: Low / Normal / High / Critical — Critical and High priorities are highlighted in the list view and on the equipment status banner.">
+                               data-bs-content="Select the equipment this service applies to. Maintenance Type is a free-text label like Preventive, Repair, or Inspection. Status: Scheduled = planned, In Progress = underway, Completed = finished. Priority: Low / Normal / High / Critical &mdash; Critical and High priorities are highlighted in the list view and on the equipment status banner.">
                                 <i class="bi bi-question-circle"></i>
                             </a>
                         </div>

src/PowderCoating.Web/Views/Maintenance/Index.cshtml

@@ -29,7 +29,7 @@
     <div class="alert alert-warning alert-permanent d-flex justify-content-between align-items-center mb-3">
         <div>
             <i class="bi bi-funnel-fill me-2"></i>
-            Showing <strong>@Model.TotalCount</strong> pending maintenance record@(Model.TotalCount == 1 ? "" : "s") — Scheduled, In Progress, or Overdue
+            Showing <strong>@Model.TotalCount</strong> pending maintenance record@(Model.TotalCount == 1 ? "" : "s") &mdash; Scheduled, In Progress, or Overdue
         </div>
         <a href="@Url.Action("Index")" class="btn btn-sm btn-outline-secondary">
             <i class="bi bi-x me-1"></i>Show All