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/Customers/Statement.cshtml

@@ -1,12 +1,12 @@
 @model PowderCoating.Application.DTOs.Accounting.CustomerStatementDto
 @{
-    ViewData["Title"] = $"Statement – {Model.CustomerName}";
+    ViewData["Title"] = $"Statement – {Model.CustomerName}";
 }
 
 <div class="d-flex justify-content-between align-items-start mb-4 flex-wrap gap-2">
     <div>
         <h4 class="mb-0">Customer Statement</h4>
-        <p class="text-muted mb-0">@Model.CustomerName &nbsp;·&nbsp; @Model.From.ToString("MMM d, yyyy") – @Model.To.ToString("MMM d, yyyy")</p>
+        <p class="text-muted mb-0">@Model.CustomerName &nbsp;·&nbsp; @Model.From.ToString("MMM d, yyyy") &ndash; @Model.To.ToString("MMM d, yyyy")</p>
     </div>
     <div class="d-flex gap-2 flex-wrap">
         <form method="get" class="d-flex gap-2 align-items-center">