refactor(design): no amber boxes, attention is one ochre sentence (#1562)

The founder wants the yellow boxes gone everywhere. The design system
already agreed: status colors are data, not chrome (convention 12) and
attention is a single ochre sentence, never a banner (convention 6).
This enforces it:

- ConfirmationDialog: the amber warning panel is now an AttnLine, and
  the hardcoded Swedish default warningText is gone: it injected an
  immutability warning into dialogs whose authors never asked for one
  (every current caller passes the prop explicitly, so no behavior
  change at any call site).
- Badge warning variant: amber fill replaced with a hairline chip and
  ochre text.
- DestructiveConfirmDialog warning variant: neutral icon disc, default
  primary confirm button (only --destructive survives as chrome).
- BankSyncStatusChip stale state: same neutral shape as the healthy
  chip, ochre text carries the signal.
- SandboxBanner: solid amber bar becomes secondary-on-border chrome.
- BankIdAuth, BankIdCompanyPicker, SessionTimeoutModal: the last three
  raw-amber (bg-amber-*) holdouts moved onto tokens, the company-picker
  banner becoming a plain AttnLine.
- Mechanical sweep of the ~58 hand-rolled bg-warning/border-warning
  boxes across 45 files: fills to bg-muted/30 (icon discs bg-muted),
  borders to border-border, text-warning-foreground to text-attn. The
  account-class dots in account-number.tsx keep bg-warning: they are
  data indicators, not chrome.

Co-authored-by: Jakob Wennberg <311770904+jakobwennberg-oss@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

components/transactions/InvoiceMatchDialog.tsx

@@ -404,11 +404,11 @@ export default function InvoiceMatchDialog({
           <div className="space-y-4">
             {/* Duplicate-payment warning: customer-side only, only when a candidate exists */}
             {!targetBlocked && candidate && isCustomerInvoice && (
-              <div className="rounded-lg border border-warning/40 bg-warning/10 p-4 space-y-3">
+              <div className="rounded-lg border border-border bg-muted/30 p-4 space-y-3">
                 <div className="flex items-start gap-2">
-                  <AlertTriangle className="h-4 w-4 flex-shrink-0 mt-0.5 text-warning-foreground" />
+                  <AlertTriangle className="h-4 w-4 flex-shrink-0 mt-0.5 text-attn" />
                   <div className="text-sm space-y-1">
-                    <p className="font-medium text-warning-foreground">{t('duplicate_title')}</p>
+                    <p className="font-medium text-attn">{t('duplicate_title')}</p>
                     {/* candidate.amount is the voucher leg's SEK debit
                         (duplicate-payment-detection.ts), so it is formatted as
                         SEK regardless of the transaction's currency: an
@@ -553,7 +553,7 @@ export default function InvoiceMatchDialog({
               if (targetBlocked) {
                 const isSettled = targetMatchState === 'settled'
                 return (
-                  <div className="flex items-start gap-2 p-3 rounded-lg bg-warning/10 text-warning-foreground">
+                  <div className="flex items-start gap-2 p-3 rounded-lg bg-muted/30 text-attn">
                     <AlertTriangle className="h-4 w-4 flex-shrink-0 mt-0.5" />
                     <div className="text-sm">
                       <p className="font-medium">
@@ -617,7 +617,7 @@ export default function InvoiceMatchDialog({
               }
 
               return (
-                <div className="flex items-start gap-2 p-3 rounded-lg bg-warning/10 text-warning-foreground">
+                <div className="flex items-start gap-2 p-3 rounded-lg bg-muted/30 text-attn">
                   <AlertTriangle className="h-4 w-4 flex-shrink-0 mt-0.5" />
                   <div className="text-sm">
                     <p className="font-medium">{t('amounts_differ')}</p>
@@ -652,9 +652,9 @@ export default function InvoiceMatchDialog({
                 rather than inside the Valutaomräkning card below, because in
                 this state the preview 400s and that card never renders. */}
             {!targetBlocked && invoiceRateMissing && (
-              <div className="rounded-lg border border-warning/40 bg-warning/5 p-4">
+              <div className="rounded-lg border border-border bg-muted/30 p-4">
                 <div className="flex items-start gap-2">
-                  <AlertTriangle className="h-4 w-4 mt-0.5 text-warning-foreground flex-shrink-0" />
+                  <AlertTriangle className="h-4 w-4 mt-0.5 text-attn flex-shrink-0" />
                   <div className="flex-1 text-sm">
                     {/* Untinted title, matching the sibling
                         fx_rate_unavailable panel below: the ochre lives in the
@@ -691,9 +691,9 @@ export default function InvoiceMatchDialog({
               if ('error' in fx) {
                 // Riksbanken unavailable: show manual rate input.
                 return (
-                  <div className="rounded-lg border border-warning/40 bg-warning/5 p-4 space-y-3">
+                  <div className="rounded-lg border border-border bg-muted/30 p-4 space-y-3">
                     <div className="flex items-start gap-2">
-                      <AlertTriangle className="h-4 w-4 mt-0.5 text-warning-foreground flex-shrink-0" />
+                      <AlertTriangle className="h-4 w-4 mt-0.5 text-attn flex-shrink-0" />
                       <div className="flex-1 text-sm">
                         <p className="font-medium">{t('fx_rate_unavailable_title')}</p>
                         <p className="text-muted-foreground mt-1">