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/settings/ApiKeysPanel.tsx

@@ -683,7 +683,7 @@ export function ApiKeysPanel() {
               {hasSodConflict && (
                 <div
                   role="alert"
-                  className="flex items-start gap-2 rounded-md border border-warning/40 bg-warning/10 p-3 text-xs text-foreground"
+                  className="flex items-start gap-2 rounded-md border border-border bg-muted/30 p-3 text-xs text-foreground"
                 >
                   <AlertTriangle className="mt-0.5 h-4 w-4 shrink-0 text-warning" />
                   <p className="leading-snug">{t('sod_warning')}</p>

components/settings/TemplateForm.tsx

@@ -323,8 +323,8 @@ export function TemplateForm({
       </div>
 
       {ratioSumOff && (
-        <div className="rounded-lg border border-warning/30 bg-warning/[0.03] px-3 py-2">
-          <p className="text-xs text-warning-foreground leading-snug">
+        <div className="rounded-lg border border-border bg-muted/30 px-3 py-2">
+          <p className="text-xs text-attn leading-snug">
             {t('ratio_sum_warning')}
           </p>
         </div>
@@ -361,16 +361,16 @@ export function TemplateForm({
       )}
 
       {nameCollision && (
-        <div className="rounded-lg border border-warning/30 bg-warning/[0.03] px-3 py-2">
-          <p className="text-xs text-warning-foreground leading-snug">
+        <div className="rounded-lg border border-border bg-muted/30 px-3 py-2">
+          <p className="text-xs text-attn leading-snug">
             {t('duplicate_name_warning')}
           </p>
         </div>
       )}
 
       {!isConvertible && (
-        <div className="rounded-lg border border-warning/30 bg-warning/[0.03] px-3 py-2">
-          <p className="text-xs text-warning-foreground leading-snug">
+        <div className="rounded-lg border border-border bg-muted/30 px-3 py-2">
+          <p className="text-xs text-attn leading-snug">
             {t('unconvertible_hint')}
           </p>
         </div>