chore(style): codebase em-dash sweep + minor layout polish

Replaces every em-dash and en-dash with regular ASCII hyphens
across comments, JSX strings, and dev-facing logs. Mostly cosmetic
but stops the inconsistent mix that crept in over the last few
months (some files used em-dashes in comments, others didn't,
some used both).

Bundles two small dashboard-layout tweaks that touch a couple of
already-modified files:
- (dashboard)/layout.tsx main padding goes from p-6 to pt-3 px-6
  pb-6 so page content sits closer to the topbar.
- Sidebar now receives the ports list it needs for the footer
  port switcher.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/admin/queue-detail-table.tsx

@@ -33,7 +33,7 @@ const statusVariant: Record<JobStatus, 'default' | 'secondary' | 'destructive' |
 };
 
 function formatDate(ts: number | undefined): string {
-  if (!ts) return '—';
+  if (!ts) return '-';
   return new Date(ts).toLocaleString();
 }
 
@@ -42,7 +42,7 @@ function truncateId(id: string): string {
 }
 
 function truncateReason(reason: string | undefined): string {
-  if (!reason) return '—';
+  if (!reason) return '-';
   return reason.length > 80 ? `${reason.slice(0, 80)}…` : reason;
 }
 
@@ -184,7 +184,7 @@ export function QueueDetailTable({ queueName }: QueueDetailTableProps) {
       {totalPages > 1 && (
         <div className="flex items-center justify-between text-sm text-muted-foreground">
           <span>
-            {total} total jobs — page {page} of {totalPages}
+            {total} total jobs - page {page} of {totalPages}
           </span>
           <div className="flex gap-2">
             <Button