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/Accounts/Ledger.cshtml

@@ -2,7 +2,7 @@
 @using PowderCoating.Core.Enums
 
 @{
-    ViewData["Title"] = $"Ledger — {Model.AccountNumber} {Model.Name}";
+    ViewData["Title"] = $"Ledger — {Model.AccountNumber} {Model.Name}";
     ViewData["PageIcon"] = "bi-journal-text";
     ViewData["PageHelpTitle"] = "Account Ledger";
     ViewData["PageHelpContent"] = "A chronological list of every transaction posted to this account. Click any Reference to open the source record. Debit increases asset and expense accounts; credit increases liability, equity, and revenue accounts. Use the date range or quick buttons (This Month, YTD, etc.) to narrow the view.";
@@ -60,7 +60,7 @@
 <nav aria-label="breadcrumb" class="mb-3">
     <ol class="breadcrumb">
         <li class="breadcrumb-item"><a asp-action="Index">Chart of Accounts</a></li>
-        <li class="breadcrumb-item active">@Model.AccountNumber – @Model.Name</li>
+        <li class="breadcrumb-item active">@Model.AccountNumber &ndash; @Model.Name</li>
     </ol>
 </nav>
 
@@ -166,7 +166,7 @@
                 <i class="bi bi-journal-text me-1"></i>
                 Transactions
                 <span class="text-muted fw-normal small ms-1">
-                    @Model.From.ToString("MMM d") – @Model.To.ToString("MMM d, yyyy")
+                    @Model.From.ToString("MMM d") &ndash; @Model.To.ToString("MMM d, yyyy")
                 </span>
             </span>
             <a tabindex="0" class="help-icon" role="button"
@@ -205,7 +205,7 @@
                     <!-- Opening balance row -->
                     <tr class="table-light">
                         <td class="text-muted small">@Model.From.ToString("MM/dd/yyyy")</td>
-                        <td><span class="fw-medium text-muted">—</span></td>
+                        <td><span class="fw-medium text-muted">&mdash;</span></td>
                         <td><span class="badge bg-dark-subtle text-dark">Opening Balance</span></td>
                         <td class="text-muted small">Balance brought forward as of @Model.From.ToString("MMM d, yyyy")</td>
                         <td></td>