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/app/(dashboard)/[portSlug]/clients/[clientId]/loading.tsx

@@ -4,13 +4,13 @@ import { CardSkeleton } from '@/components/shared/loading-skeleton';
 /**
  * Route-level loading UI for the client detail page. Renders while the
  * server component resolves the session and the client component bootstraps
- * its initial query — replaces the previous empty-header flash on direct
+ * its initial query - replaces the previous empty-header flash on direct
  * URL visits.
  */
 export default function Loading() {
   return (
     <div className="space-y-6">
-      {/* Header strip — title, badges, action buttons */}
+      {/* Header strip - title, badges, action buttons */}
       <div className="rounded-xl border border-border bg-card px-5 py-4 shadow-sm space-y-3">
         <div className="flex items-center gap-3">
           <Skeleton className="h-7 w-56" />