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/residential/residential-interests-list.tsx

@@ -40,8 +40,8 @@ const STAGE_LABELS: Record<string, string> = {
   viewing_scheduled: 'Viewing scheduled',
   offer_made: 'Offer made',
   offer_accepted: 'Offer accepted',
-  closed_won: 'Closed — won',
-  closed_lost: 'Closed — lost',
+  closed_won: 'Closed - won',
+  closed_lost: 'Closed - lost',
 };
 
 export function ResidentialInterestsList() {
@@ -136,12 +136,12 @@ export function ResidentialInterestsList() {
                   </Link>
                 </td>
                 <td className="px-3 py-2 text-muted-foreground truncate max-w-xs">
-                  {i.preferences ?? '—'}
+                  {i.preferences ?? '-'}
                 </td>
                 <td className="px-3 py-2 text-muted-foreground truncate max-w-xs">
-                  {i.notes ?? '—'}
+                  {i.notes ?? '-'}
                 </td>
-                <td className="px-3 py-2 capitalize text-muted-foreground">{i.source ?? '—'}</td>
+                <td className="px-3 py-2 capitalize text-muted-foreground">{i.source ?? '-'}</td>
                 <td className="px-3 py-2 text-muted-foreground text-xs">
                   {new Date(i.updatedAt).toLocaleDateString()}
                 </td>