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/app/cases/[caseNumber]/page.tsx

@@ -91,6 +91,9 @@ export default function CaseDetailPage({
     <>
       {data && <CaseEditDialog data={data} />}
       <UploadSheet caseNumber={caseNumber} />
+      <Button asChild className="bg-gold text-white hover:bg-gold-deep border-transparent">
+        <Link href={`/cases/${caseNumber}/compose`}>פתח עורך החלטה</Link>
+      </Button>
       {canStartWorkflow && (
         <Button
           className="bg-gold-deep hover:bg-gold-deep/90 text-parchment"
@@ -135,16 +138,7 @@ export default function CaseDetailPage({
               <DocumentsPanel data={data} />
 
               <AgentActivityPreview caseNumber={caseNumber} />
-
-              {/* gold CTA — open the decision editor */}
-              <Button
-                asChild
-                className="w-full bg-gold text-white hover:bg-gold-deep border-transparent py-6 text-base font-semibold"
-              >
-                <Link href={`/cases/${caseNumber}/compose`}>
-                  פתח עורך החלטה →
-                </Link>
-              </Button>
+              {/* decision-editor CTA moved to the band actions (visible on all tabs) */}
             </TabsContent>
 
             <TabsContent value="arguments" className="mt-0">