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/Inventory/Ledger.cshtml

@@ -33,7 +33,7 @@
         @if (!string.IsNullOrEmpty(Model.SelectedItemName))
         {
             <div class="text-muted small">
-                <i class="bi bi-box-seam me-1"></i>@Model.SelectedItemSku — @Model.SelectedItemName
+                <i class="bi bi-box-seam me-1"></i>@Model.SelectedItemSku &mdash; @Model.SelectedItemName
             </div>
         }
     </div>
@@ -42,7 +42,7 @@
     </a>
 </div>
 
-@* ── Filter Bar ─────────────────────────────────────────────── *@
+@* -- Filter Bar ----------------------------------------------- *@
 <form method="get" class="filter-bar">
     <input type="hidden" name="tab" value="@activeTab" />
     <div class="d-flex flex-wrap gap-2 align-items-end">
@@ -53,7 +53,7 @@
                 @foreach (var item in Model.AllItems)
                 {
                     <option value="@item.Id" selected="@(Model.InventoryItemId == item.Id)">
-                        @item.SKU — @item.Name
+                        @item.SKU &mdash; @item.Name
                     </option>
                 }
             </select>
@@ -85,7 +85,7 @@
     </div>
 </form>
 
-@* ── Summary Pills ───────────────────────────────────────────── *@
+@* -- Summary Pills --------------------------------------------- *@
 <div class="d-flex flex-wrap gap-3 mb-3">
     <div class="stat-pill">
         <div class="stat-val text-success">@Model.TotalPurchased.ToString("N2")</div>
@@ -111,7 +111,7 @@
     </div>
 </div>
 
-@* ── Tabs ─────────────────────────────────────────────────────── *@
+@* -- Tabs ------------------------------------------------------- *@
 <ul class="nav nav-tabs mb-3" id="ledgerTabs">
     <li class="nav-item">
         <button class="nav-link @(activeTab == "transactions" ? "active" : "")"
@@ -129,7 +129,7 @@
     </li>
 </ul>
 
-@* ── Transactions Tab ─────────────────────────────────────────── *@
+@* -- Transactions Tab ------------------------------------------- *@
 <div id="tab-transactions" class="@(activeTab != "usage" ? "" : "d-none")">
     @if (!Model.Transactions.Any())
     {
@@ -200,7 +200,7 @@
                                 }
                                 else
                                 {
-                                    <span class="text-muted">—</span>
+                                    <span class="text-muted">&mdash;</span>
                                 }
                             </td>
                             <td><small class="text-muted">@t.Notes</small></td>
@@ -226,7 +226,7 @@
     }
 </div>
 
-@* ── Usage Tab ────────────────────────────────────────────────── *@
+@* -- Usage Tab -------------------------------------------------- *@
 <div id="tab-usage" class="@(activeTab == "usage" ? "" : "d-none")">
     @if (!Model.PowderUsageLogs.Any())
     {
@@ -291,7 +291,7 @@
                                     }
                                 </td>
                             }
-                            <td>@(u.CoatColor ?? "—")</td>
+                            <td>@(u.CoatColor ?? "&mdash;")</td>
                             <td class="text-end">@u.EstimatedLbs.ToString("N3")</td>
                             <td class="text-end fw-semibold">@u.ActualLbsUsed.ToString("N3")</td>
                             <td class="text-end @(variance > 0 ? "variance-over" : variance < 0 ? "variance-under" : "")">
@@ -344,7 +344,7 @@
             </div>
             <div class="modal-body">
                 <div id="editUsageLoading" class="text-center py-4">
-                    <div class="spinner-border spinner-border-sm me-2"></div>Loading…
+                    <div class="spinner-border spinner-border-sm me-2"></div>Loading&hellip;
                 </div>
                 <form id="editUsageForm" class="d-none">
                     @Html.AntiForgeryToken()
@@ -356,7 +356,7 @@
                     <div class="mb-3">
                         <label for="euJobId" class="form-label fw-semibold">Job <span class="text-muted fw-normal">(optional)</span></label>
                         <select id="euJobId" name="jobId" class="form-select">
-                            <option value="">— No job —</option>
+                            <option value="">&mdash; No job &mdash;</option>
                         </select>
                         <div class="form-text">Select the job this powder was used on.</div>
                     </div>