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/lib/db/seed.ts

@@ -3,7 +3,7 @@
  *
  * Top-level orchestrator:
  *   1. Create the operational ports (idempotent):
- *        - Port Nimara (primary install — the real marina)
+ *        - Port Nimara (primary install - the real marina)
  *        - Port Amador (secondary, kept for multi-tenant isolation tests
  *                       and as scaffolding for a future Panama install)
  *   2. Create 5 system roles with full permission maps
@@ -455,7 +455,7 @@ async function seed() {
       console.log(`  Port created: ${def.name} (${inserted.id})`);
       portIds.push({ id: inserted.id, name: def.name, slug: def.slug });
     } else {
-      // Port already existed — look it up so we can still seed fixtures for it.
+      // Port already existed - look it up so we can still seed fixtures for it.
       const [existing] = await db.select().from(ports).where(eq(ports.slug, def.slug)).limit(1);
       if (existing) {
         console.log(`  Port exists: ${def.name} (${existing.id})`);
@@ -560,11 +560,11 @@ async function seed() {
   console.log('─── Summary ───────────────────────────────────────────────');
   for (const s of summaries) {
     if (s.summary === null) {
-      console.log(`  ✓ Port "${s.name}" — already seeded (skipped)`);
+      console.log(`  ✓ Port "${s.name}" - already seeded (skipped)`);
     } else {
       const x = s.summary;
       console.log(
-        `  ✓ Port "${s.name}" — ${x.berths} berths, ${x.clients} clients, ${x.companies} companies, ${x.yachts} yachts, ${x.interests} interests, ${x.reservations} reservations`,
+        `  ✓ Port "${s.name}" - ${x.berths} berths, ${x.clients} clients, ${x.companies} companies, ${x.yachts} yachts, ${x.interests} interests, ${x.reservations} reservations`,
       );
     }
   }