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/PurchaseOrders/Edit.cshtml

@@ -1,4 +1,4 @@
-@using PowderCoating.Application.DTOs.PurchaseOrder
+@using PowderCoating.Application.DTOs.PurchaseOrder
 @model UpdatePurchaseOrderDto
 
 @{
@@ -57,7 +57,7 @@
                             <label asp-for="VendorId" class="form-label fw-semibold">Vendor <span class="text-danger">*</span></label>
                             <select asp-for="VendorId" asp-items="@ViewBag.Vendors" class="form-select"
                                     data-quick-add-url="/Vendors/Create" data-quick-add-title="Add New Vendor">
-                                <option value="__new__">+ Add New Vendor…</option>
+                                <option value="__new__">+ Add New Vendor&hellip;</option>
                             </select>
                             <span asp-validation-for="VendorId" class="text-danger small"></span>
                         </div>
@@ -114,12 +114,12 @@
                         <div class="col-md-6">
                             <label asp-for="Notes" class="form-label fw-semibold">Notes</label>
                             <textarea asp-for="Notes" class="form-control" rows="3"
-                                      placeholder="Visible on PO…"></textarea>
+                                      placeholder="Visible on PO&hellip;"></textarea>
                         </div>
                         <div class="col-md-6">
                             <label asp-for="InternalNotes" class="form-label fw-semibold">Internal Notes</label>
                             <textarea asp-for="InternalNotes" class="form-control" rows="3"
-                                      placeholder="Internal use only…"></textarea>
+                                      placeholder="Internal use only&hellip;"></textarea>
                         </div>
                     </div>
                 </div>