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/SeedData/Index.cshtml

@@ -29,7 +29,7 @@
         <i class="bi bi-exclamation-octagon-fill fs-4 flex-shrink-0 mt-1 text-danger"></i>
         <div>
             <div class="fw-semibold">You are running in Production</div>
-            <div class="small mt-1">Seed operations write data directly to the live database. Only proceed if you have a specific, intentional reason — for example, onboarding a new company. Do not seed the default demo company in production.</div>
+            <div class="small mt-1">Seed operations write data directly to the live database. Only proceed if you have a specific, intentional reason &mdash; for example, onboarding a new company. Do not seed the default demo company in production.</div>
         </div>
     </div>
     </environment>
@@ -210,7 +210,7 @@
                     </table>
                 </div>
 
-                <!-- Mobile card view — shown on screens < 992px -->
+                <!-- Mobile card view &mdash; shown on screens < 992px -->
                 <div class="mobile-card-view d-lg-none">
                     <div class="mobile-card-list">
                         @foreach (var company in Model)