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/StorageMigration/Index.cshtml

@@ -1,4 +1,4 @@
-@{
+@{
     ViewData["Title"] = "Storage Migration";
     ViewData["PageIcon"] = "bi-cloud-upload";
     bool mediaExists = ViewBag.MediaExists;
@@ -97,7 +97,7 @@
                         </tbody>
                     </table>
 
-                    <!-- Mobile card view — shown on screens < 992px -->
+                    <!-- Mobile card view &mdash; shown on screens < 992px -->
                     <div class="mobile-card-view d-lg-none p-3">
                         <div class="mobile-card-list">
                             <div class="mobile-data-card">
@@ -163,7 +163,7 @@
                         </div>
                         <div class="form-text text-warning">
                             <i class="bi bi-exclamation-triangle me-1"></i>
-                            Leave unchecked on the first run. Files already in Azure are always skipped — re-running is safe.
+                            Leave unchecked on the first run. Files already in Azure are always skipped &mdash; re-running is safe.
                         </div>
                     </div>
 
@@ -171,7 +171,7 @@
                         <i class="bi bi-cloud-upload me-2"></i>Start Migration
                     </button>
                     <span class="ms-3 text-muted d-none" id="migrationSpinner">
-                        <span class="spinner-border spinner-border-sm me-1"></span>Migrating @localFileCount files, please wait…
+                        <span class="spinner-border spinner-border-sm me-1"></span>Migrating @localFileCount files, please wait&hellip;
                     </span>
                 </form>
             </div>