Design consistency audit fixes: alerts, cards, dark mode, utilities

Alert sweep (113 alerts, 79 files):
  All persistent static banners now carry alert-permanent so the
  layout's 5-second auto-dismiss cannot swallow guidance, warnings,
  or validation errors. Transient dismissible toasts left untouched.

CSS fixes (site.css):
  .card.shadow-sm      — strips rogue border from ~40 drifted cards
  .card-header.bg-white — rebinds to var(--bs-body-bg) so card
                          headers follow dark/light theme correctly
  Typography utilities  — .text-2xs (.68rem), .text-xs (.73rem)
  Token color classes   — .text-ember, .text-ok, .text-bad,
                          .text-warn, .text-cool, .bg-paper-2
  Layout utilities      — .mw-xs/sm/md/lg replace inline max-width
  Comment              — documents text-ember vs text-primary intent

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

src/PowderCoating.Web/Views/SetupWizard/Complete.cshtml

@@ -1,4 +1,4 @@
-@using PowderCoating.Application.DTOs.Wizard
+@using PowderCoating.Application.DTOs.Wizard
 @{
     ViewData["Title"] = "Setup Complete!";
     var progress = ViewBag.Progress as WizardProgressDto ?? new WizardProgressDto();
@@ -78,7 +78,7 @@
     </div>
     <h1>You're all set!</h1>
     <p style="color:rgba(255,255,255,0.8);font-size:1.05rem;max-width:500px;margin:0 auto 1.5rem;">
-        Your setup is complete. @progress.DoneSteps.Count of @WizardProgressDto.TotalSteps steps were configured — your shop is ready to roll.
+        Your setup is complete. @progress.DoneSteps.Count of @WizardProgressDto.TotalSteps steps were configured — your shop is ready to roll.
     </p>
     @if (showGuidedActivationCta)
     {
@@ -135,7 +135,7 @@
 
 @if (progress.SkippedSteps.Any(s => !progress.IsStepDone(s)))
 {
-    <div class="alert alert-warning d-flex gap-2 mb-4">
+    <div class="alert alert-warning alert-permanent d-flex gap-2 mb-4">
         <i class="bi bi-exclamation-triangle-fill flex-shrink-0 mt-1"></i>
         <div>
             You skipped @progress.SkippedSteps.Count(s => !progress.IsStepDone(s)) step(s). You can always re-run the setup wizard from