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/CompanySettings/EditTemplate.cshtml

@@ -1,6 +1,6 @@
 @model PowderCoating.Application.DTOs.Notification.NotificationTemplateDto
 @{
-    ViewData["Title"] = $"Edit Template — {Model.DisplayName}";
+    ViewData["Title"] = $"Edit Template — {Model.DisplayName}";
     ViewData["PageIcon"] = "bi-envelope-gear";
     var placeholders = ViewBag.Placeholders as List<(string Placeholder, string Description)>
         ?? new List<(string, string)>();
@@ -70,7 +70,7 @@
 
                             @if (isEmail)
                             {
-                                <!-- Raw HTML textarea for email — supports {{placeholders}} and full HTML -->
+                                <!-- Raw HTML textarea for email &mdash; supports {{placeholders}} and full HTML -->
                                 <textarea asp-for="Body" class="form-control font-monospace" rows="16"
                                           placeholder="Enter HTML email body..."></textarea>
                                 <div class="form-text text-muted mt-1">
@@ -131,7 +131,7 @@
                             <div>
                                 <span class="badge bg-light text-dark border placeholder-pill px-2 py-1"
                                       onclick="copyPlaceholder('@placeholder', this)"
-                                      title="@description — click to copy">
+                                      title="@description &mdash; click to copy">
                                     @placeholder
                                 </span>
                                 <span class="copy-feedback ms-1">Copied!</span>