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/SetupWizard/Complete.cshtml

@@ -1,4 +1,4 @@
-@using PowderCoating.Application.DTOs.Wizard
+@using PowderCoating.Application.DTOs.Wizard
 @{
     ViewData["Title"] = "Setup Complete!";
     var progress = ViewBag.Progress as WizardProgressDto ?? new WizardProgressDto();
@@ -78,7 +78,7 @@
     </div>
     <h1>You're all set!</h1>
     <p style="color:rgba(255,255,255,0.8);font-size:1.05rem;max-width:500px;margin:0 auto 1.5rem;">
-        Your setup is complete. @progress.DoneSteps.Count of @WizardProgressDto.TotalSteps steps were configured — your shop is ready to roll.
+        Your setup is complete. @progress.DoneSteps.Count of @WizardProgressDto.TotalSteps steps were configured &mdash; your shop is ready to roll.
     </p>
     @if (showGuidedActivationCta)
     {