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/onboarding/Step1EntityType.tsx

@@ -68,7 +68,7 @@ export default function Step1EntityType({ initialData, onNext, isSaving }: Step1
             >
               <Card
                 className={cn(
-                  'relative p-4 transition-all',
+                  'relative p-4 transition-colors',
                   option.disabled
                     ? 'opacity-50 cursor-not-allowed'
                     : 'cursor-pointer hover:border-primary/50',
@@ -77,7 +77,7 @@ export default function Step1EntityType({ initialData, onNext, isSaving }: Step1
               >
                 <div className="flex items-start gap-4">
                   <div className={cn(
-                    'p-2.5 rounded-lg',
+                    'p-2 rounded-lg',
                     isSelected ? 'bg-primary/10' : 'bg-muted/50'
                   )}>
                     <Icon className={cn(