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/AccountingExport/Index.cshtml

@@ -49,7 +49,7 @@
                                     <div class="mt-1 text-success" style="font-size:1.6rem;"><i class="bi bi-building"></i></div>
                                     <div>
                                         <div class="fw-semibold">QuickBooks Desktop</div>
-                                        <div class="text-muted small">IIF files — import directly via File &gt; Utilities &gt; Import</div>
+                                        <div class="text-muted small">IIF files &mdash; import directly via File &gt; Utilities &gt; Import</div>
                                         <div class="mt-2">
                                             <span class="badge bg-light text-dark border me-1">customers.iif</span>
                                             <span class="badge bg-light text-dark border me-1">invoices_payments.iif</span>
@@ -146,7 +146,7 @@
         });
     }
 
-    // Init — mark CSV as selected by default
+    // Init &mdash; mark CSV as selected by default
     document.getElementById('fmt-csv').checked = true;
     updateFormatCards();
 
@@ -154,7 +154,7 @@
     document.getElementById('exportForm').addEventListener('submit', function() {
         const btn = document.getElementById('exportBtn');
         btn.disabled = true;
-        btn.innerHTML = '<span class="spinner-border spinner-border-sm me-2"></span>Generating…';
+        btn.innerHTML = '<span class="spinner-border spinner-border-sm me-2"></span>Generating&hellip;';
         setTimeout(function() { btn.disabled = false; btn.innerHTML = '<i class="bi bi-download me-2"></i>Download Export Package'; }, 8000);
     });