Fix encoding corruption in Bills and Expenses views

Replace literal Unicode chars (em dash, ellipsis, angle quotes, box-drawing)
with HTML entities to prevent corruption from AI tools and Windows encoding.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/PowderCoating.Web/Views/Expenses/Index.cshtml

@@ -34,7 +34,7 @@
         <form method="get" class="row g-2 align-items-end">
             <div class="col-md-3">
                 <input type="search" name="search" value="@ViewBag.Search" class="form-control"
-                       placeholder="Search memo or vendor…" />
+                       placeholder="Search memo or vendor&hellip;" />
             </div>
             <div class="col-md-3">
                 <select name="accountId" class="form-select">