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/(portal)/portal/my-reservations/page.tsx

@@ -59,7 +59,7 @@ export default async function PortalMyReservationsPage() {
                   <div className="flex items-center gap-2 mb-1">
                     <span className="font-medium text-gray-900">{r.yachtName ?? 'Yacht'}</span>
                     {r.berthMooringNumber && (
-                      <span className="text-sm text-gray-400">— Berth {r.berthMooringNumber}</span>
+                      <span className="text-sm text-gray-400">- Berth {r.berthMooringNumber}</span>
                     )}
                   </div>
                   <p className="text-sm text-gray-500">