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/CompanyUsers/Create.cshtml

@@ -1,10 +1,10 @@
-@model PowderCoating.Application.DTOs.User.CreateCompanyUserDto
+@model PowderCoating.Application.DTOs.User.CreateCompanyUserDto
 
 @{
     ViewData["Title"] = "Add New User";
     ViewData["PageIcon"] = "bi-person-plus";
     ViewData["PageHelpTitle"] = "Add New User";
-    ViewData["PageHelpContent"] = "Creates a new login account for a member of your company. The email address doubles as the login username. Set a temporary password — the user can change it from their Profile page after their first login. Assign a Role, then fine-tune individual permissions below.";
+    ViewData["PageHelpContent"] = "Creates a new login account for a member of your company. The email address doubles as the login username. Set a temporary password — the user can change it from their Profile page after their first login. Assign a Role, then fine-tune individual permissions below.";
 }
 
 <div class="container">
@@ -26,7 +26,7 @@
                             <a tabindex="0" class="help-icon" role="button"
                                data-bs-toggle="popover" data-bs-placement="right" data-bs-trigger="focus"
                                data-bs-title="Basic Information"
-                               data-bs-content="First Name, Last Name, and Email are required. The email is used as the login username — it must be unique across the system. Employee Number is an optional internal reference. The user can update their name and phone from their own Profile page after logging in.">
+                               data-bs-content="First Name, Last Name, and Email are required. The email is used as the login username &mdash; it must be unique across the system. Employee Number is an optional internal reference. The user can update their name and phone from their own Profile page after logging in.">
                                 <i class="bi bi-question-circle"></i>
                             </a>
                         </div>