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/Announcements/Index.cshtml

@@ -60,7 +60,7 @@
                             onclick="window.location='@Url.Action("Edit", new { id = a.Id })'">
                             <td>
                                 <div class="fw-medium">@a.Title</div>
-                                <small class="text-muted">@a.Message.Substring(0, Math.Min(60, a.Message.Length))@(a.Message.Length > 60 ? "…" : "")</small>
+                                <small class="text-muted">@a.Message.Substring(0, Math.Min(60, a.Message.Length))@(a.Message.Length > 60 ? "&hellip;" : "")</small>
                             </td>
                             <td><span class="badge @TypeBadge(a.Type)">@a.Type</span></td>
                             <td>
@@ -110,7 +110,7 @@
                 </tbody>
             </table>
         </div>
-        <!-- Mobile card view — shown on screens < 992px -->
+        <!-- Mobile card view &mdash; shown on screens < 992px -->
         <div class="mobile-card-view">
             <div class="mobile-card-list">
                 @if (!Model.Any())