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/Reports/CashFlowStatement.cshtml

@@ -11,7 +11,7 @@
     <div>
         <h4 class="fw-bold mb-0"><i class="bi bi-water me-2 text-info"></i>Cash Flow Statement</h4>
         <p class="text-muted small mb-0">
-            @Model.From.ToString("MMMM d, yyyy") – @Model.To.ToString("MMMM d, yyyy")
+            @Model.From.ToString("MMMM d, yyyy") &ndash; @Model.To.ToString("MMMM d, yyyy")
             &nbsp;·&nbsp; Direct Method (Cash Basis)
         </p>
     </div>