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>

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

components/extensions/general/InvoiceInboxWorkspace.tsx

@@ -1225,7 +1225,7 @@ function OnboardingCard({
     {
       done: hasAnyItem,
       title: 'Ladda upp eller maila in ett underlag',
-      hint: 'accounted tolkar fakturan eller kvittot åt dig och fyller i fält automatiskt.',
+      hint: 'Accounted tolkar fakturan eller kvittot åt dig och fyller i fält automatiskt.',
     },
     {
       done: hasResolvedItem,
@@ -1589,7 +1589,7 @@ function FieldsRail({
               AI-tolkning ingår i abonnemanget
             </div>
             <p className="text-xs text-muted-foreground mt-1.5 leading-relaxed">
-              Uppgradera för att låta accounted läsa av leverantör, belopp och
+              Uppgradera för att låta Accounted läsa av leverantör, belopp och
               moms automatiskt. Du kan fortfarande fylla i fälten manuellt eller
               koppla dokumentet till en transaktion nedan.
             </p>