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/audit/audit-log-list.tsx

@@ -87,7 +87,7 @@ export function AuditLogList() {
   const [loading, setLoading] = useState(true);
   const [loadingMore, setLoadingMore] = useState(false);
 
-  // Filter state — debounce text inputs.
+  // Filter state - debounce text inputs.
   const [search, setSearch] = useState('');
   const [entityType, setEntityType] = useState<string>('all');
   const [action, setAction] = useState<string>('all');
@@ -215,7 +215,7 @@ export function AuditLogList() {
             </span>
           );
         }
-        return <span className="text-xs text-muted-foreground">—</span>;
+        return <span className="text-xs text-muted-foreground">-</span>;
       },
     },
     {
@@ -245,7 +245,7 @@ export function AuditLogList() {
       <PageHeader
         title="Audit Log"
         eyebrow="Admin"
-        description="Every state change in this port — fully searchable."
+        description="Every state change in this port - fully searchable."
         variant="gradient"
       />