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/StripeEvents/Details.cshtml

@@ -1,7 +1,7 @@
 @using PowderCoating.Core.Entities
 @model StripeWebhookEvent
 @{
-    ViewData["Title"] = $"Webhook Event – {Model.EventId}";
+    ViewData["Title"] = $"Webhook Event – {Model.EventId}";
     var statusClass = Model.Status switch
     {
         StripeWebhookEventStatus.Processed => "success",
@@ -35,7 +35,7 @@
                         <dd class="col-7"><span class="badge bg-light text-dark border">@Model.EventType</span></dd>
 
                         <dt class="col-5 text-muted">Company ID</dt>
-                        <dd class="col-7">@(Model.CompanyId.HasValue ? Model.CompanyId.ToString() : "—")</dd>
+                        <dd class="col-7">@(Model.CompanyId.HasValue ? Model.CompanyId.ToString() : "&mdash;")</dd>
 
                         <dt class="col-5 text-muted">Status</dt>
                         <dd class="col-7"><span class="badge bg-@statusClass">@Model.Status</span></dd>
@@ -44,7 +44,7 @@
                         <dd class="col-7">@Model.ReceivedAt.ToString("MM/dd/yyyy HH:mm:ss") UTC</dd>
 
                         <dt class="col-5 text-muted">Processed At</dt>
-                        <dd class="col-7">@(Model.ProcessedAt.HasValue ? Model.ProcessedAt.Value.ToString("MM/dd/yyyy HH:mm:ss") + " UTC" : "—")</dd>
+                        <dd class="col-7">@(Model.ProcessedAt.HasValue ? Model.ProcessedAt.Value.ToString("MM/dd/yyyy HH:mm:ss") + " UTC" : "&mdash;")</dd>
                     </dl>
                 </div>
             </div>