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/api/public/interests/route.ts

@@ -36,7 +36,7 @@ type PublicInterestData = z.infer<typeof publicInterestSchema>;
 // Keep the helper aligned with that.
 type Tx = typeof db;
 
-// POST /api/public/interests — unauthenticated public interest registration.
+// POST /api/public/interests - unauthenticated public interest registration.
 // Creates the trio (client + yacht + interest) plus an optional company +
 // membership, all inside a single transaction.
 export async function POST(req: NextRequest) {
@@ -70,7 +70,7 @@ export async function POST(req: NextRequest) {
 
     const firstName = data.firstName ?? fullName.split(/\s+/)[0] ?? 'Valued Guest';
 
-    // Resolve berth by mooring number (if provided). Read-only lookup — safe
+    // Resolve berth by mooring number (if provided). Read-only lookup - safe
     // to do outside the transaction.
     let berthId: string | null = null;
     let resolvedMooringNumber: string | null = data.mooringNumber ?? null;