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/residential-inquiries/route.ts

@@ -34,7 +34,7 @@ async function gateRateLimit(ip: string): Promise<void> {
 }
 
 /**
- * POST /api/public/residential-inquiries — unauthenticated entry point for
+ * POST /api/public/residential-inquiries - unauthenticated entry point for
  * the public website's residential interest form. Creates a
  * `residential_clients` row and an opening `residential_interests` row in a
  * single transaction.
@@ -110,7 +110,7 @@ export async function POST(req: NextRequest) {
     emitToRoom(`port:${portId}`, 'residential_client:created', { id: result.clientId });
     emitToRoom(`port:${portId}`, 'residential_interest:created', { id: result.interestId });
 
-    // Send notification emails (non-blocking — failures shouldn't 500 the
+    // Send notification emails (non-blocking - failures shouldn't 500 the
     // public form).
     void sendResidentialNotifications({
       portId,
@@ -147,7 +147,7 @@ async function sendResidentialNotifications(args: {
   });
   await sendEmail(data.email, confirmation.subject, confirmation.html);
 
-  // Sales-team alert — pull recipients from system_settings if configured;
+  // Sales-team alert - pull recipients from system_settings if configured;
   // fall back to the inquiry_contact_email if available.
   const recipientsRow = await db.query.systemSettings.findFirst({
     where: and(