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/Jobs/Index.cshtml

@@ -81,7 +81,7 @@
                         <span class="input-group-text border-end-0"><i class="bi bi-search text-muted"></i></span>
                         <input type="text" name="searchTerm" class="form-control border-start-0"
                                id="jobSearchInput"
-                               placeholder="Search jobs… /"
+                               placeholder="Search jobs&hellip; /"
                                value="@ViewBag.SearchTerm"
                                aria-label="Search jobs">
                         <button type="submit" class="btn btn-primary"><i class="bi bi-search"></i></button>