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/ArcimMigrationWorkspace.tsx

@@ -395,10 +395,10 @@ function ProviderStep({
                   <button
                     key={provider.id}
                     disabled={isDisabled}
-                    className={`relative flex items-center gap-4 rounded-lg border p-4 text-left transition-all ${
+                    className={`relative flex items-center gap-4 rounded-lg border p-4 text-left transition-colors ${
                       isDisabled
                         ? 'cursor-not-allowed border-border/50 opacity-60'
-                        : 'border-border hover:border-primary/50 hover:bg-accent/50 active:scale-[0.98]'
+                        : 'border-border hover:border-primary/50 hover:bg-accent/50'
                     }`}
                     onClick={() => !isDisabled && onSelect(provider.id)}
                   >
@@ -1448,7 +1448,7 @@ function ResultStep({
       {/* ── Header card with overall summary ── */}
       <Card>
         <CardHeader>
-          <CardTitle className="flex items-center gap-2.5">
+          <CardTitle className="flex items-center gap-2">
             <StatusIcon status={nothingNew ? 'success' : overallIcon} />
             {nothingNew ? 'Allt är uppdaterat' :
              anySieFailed ? 'Migrering delvis genomförd' :