fix(ui): nav & layout — decision-editor in band, compose back-link, wider cases table

Chair-directed navigation/layout fixes (existing components, no new design):

1. "פתח עורך החלטה" moved into the case-page band actions (right after "העלאת
   מסמכים") so it's reachable from EVERY tab, not only סקירה. Removed the now-
   redundant full-width CTA from the overview tab.
2. Prominent "→ חזרה לדף התיק" back-link added to the /compose header (the
   breadcrumb link was too subtle).
3. Home cases table: rail trimmed 360→280px and the title cell made min-w-0 so the
   table gets the width it needs and no longer shows a horizontal scrollbar.

No backend / API change. The larger NEW citation-verification panel stays gated
behind Claude Design (preview 24-citation-verification already pushed).

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

web-ui/src/components/cases/cases-table.tsx

@@ -120,7 +120,7 @@ const columns: ColumnDef<Case>[] = [
     accessorKey: "title",
     header: "כותרת",
     cell: ({ row }) => (
-      <div className="text-ink max-w-[420px] truncate flex items-center gap-2" title={row.original.title}>
+      <div className="text-ink max-w-[420px] min-w-0 truncate flex items-center gap-2" title={row.original.title}>
         {(row.original.proceeding_type === 'בל"מ' || isBlamSubtype(row.original.appeal_subtype)) && (
           <Badge
             variant="outline"