Full-width cards on compose

Drop the max-w-4xl wrapper so the compose cards fill the available
width of the AppShell main (which is already capped at 1400px
upstream). Threshold claim / issue cards with long Hebrew prose
now get the room they need without horizontal dead space.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

web-ui/src/app/cases/[caseNumber]/compose/page.tsx

@@ -115,7 +115,6 @@ export default function ComposePage({
             </CardContent>
           </Card>
         ) : analysis.data ? (
-          <div className="max-w-4xl">
           <div className="space-y-6">
               {/* Case-level general precedents */}
               <Card className="bg-surface border-rule shadow-sm">
@@ -226,7 +225,6 @@ export default function ComposePage({
                 </Card>
               )}
           </div>
-          </div>
         ) : null}
       </section>
     </AppShell>