style(ui): system-wide UX/UI polish pass — design-system conformance + copy cleanup (#835)

* style(ui): system-wide UX/UI polish pass — design-system conformance + copy cleanup

Multi-agent scan of all 404 UI files against the locked design system, then
141 verified surgical fixes across 109 files (net -32 lines):

- Remove forbidden elevation/motion: shadow-* and rounded-xl on cards, active:scale
  bounce, hover:shadow on list items, transition-all -> transition-colors.
- Drop font-medium from single-weight Hedvig display headings/numerals.
- Replace raw rainbow Tailwind status colors with Badge variants / brand tokens /
  neutral surfaces (achromatic chrome, semantic colors stay data-only).
- Route raw dates through formatDate(), hand-rolled currency through formatCurrency(),
  add tabular-nums to financial figures; text-gray-* -> text-foreground tokens.
- Swap hand-rolled skeletons for the Skeleton primitive; off-scale spacing -> token scale.
- Fix copy: mislabeled "Leverantörsfakturor" -> "Utgifter" on bank-import outflow total,
  collapse no-op identical-branch ternaries, broken Swedish diacritics (mojibake),
  correct mismatch-password toast, correct supplier currency-field label.
- Remove PII-leaking debug console.log on register, stray console.logs.

Verified: tsc clean on all changed files, eslint clean, production build passes.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* fix(auth): sanitize residual error logs in register flow

Follow-up to PR review (compliance swarm V16 / GDPR Art.5(1)(f)): the
remaining console.error calls in the register flow passed raw error
objects, which Supabase may populate with PII (email) in nested fields.
Log only sanitized message strings instead.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

components/import/ImportReviewStep.tsx

@@ -13,7 +13,7 @@ import {
   SelectTrigger,
   SelectValue,
 } from '@/components/ui/select'
-import { formatCurrency } from '@/lib/utils'
+import { formatCurrency, formatDate } from '@/lib/utils'
 import {
   CheckCircle,
   AlertCircle,
@@ -183,7 +183,7 @@ export default function ImportReviewStep({
                   {preview.voucherCount} verifikationer bearbetas
                 </p>
               </div>
-              <div className="text-2xl font-display font-medium tabular-nums text-muted-foreground">
+              <div className="text-2xl font-display tabular-nums text-muted-foreground">
                 {elapsed}s
               </div>
               <p className="text-sm text-muted-foreground max-w-sm">
@@ -224,11 +224,11 @@ export default function ImportReviewStep({
                 <p className="font-medium">Räkenskapsår</p>
                 <p className="text-sm text-muted-foreground">
                   {preview.fiscalYearStart
-                    ? new Date(preview.fiscalYearStart).toLocaleDateString('sv-SE')
+                    ? formatDate(preview.fiscalYearStart)
                     : '?'}{' '}
                   -{' '}
                   {preview.fiscalYearEnd
-                    ? new Date(preview.fiscalYearEnd).toLocaleDateString('sv-SE')
+                    ? formatDate(preview.fiscalYearEnd)
                     : '?'}
                 </p>
               </div>