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/Quotes/Index.cshtml

@@ -21,7 +21,7 @@
         <i class="bi bi-speedometer2 fs-5 flex-shrink-0 mt-1"></i>
         <div>
             <strong>Your quoting isn't calibrated yet.</strong>
-            AI photo quotes and calculated item time estimates are using generic industry averages — they may not match your shop's actual throughput.
+            AI photo quotes and calculated item time estimates are using generic industry averages &mdash; they may not match your shop's actual throughput.
             <a href="/CompanySettings#quoting-calibration" class="alert-link ms-1">Set up your equipment profile →</a>
         </div>
         <button type="button" class="btn-close ms-auto flex-shrink-0" data-bs-dismiss="alert" aria-label="Close"></button>