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/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">