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/services/company-memberships.service.ts

@@ -33,7 +33,7 @@ function isUniqueViolation(err: unknown): boolean {
  * Loads a membership row and verifies the joined company belongs to `portId`.
  * Throws NotFoundError('Membership') if the row is missing or cross-tenant.
  *
- * Uses a JOIN to companies (memberships have no portId column — they inherit
+ * Uses a JOIN to companies (memberships have no portId column - they inherit
  * tenancy via the parent company).
  */
 async function loadMembershipScoped(
@@ -210,7 +210,7 @@ export async function setPrimary(
   portId: string,
   meta: AuditMeta,
 ): Promise<CompanyMembership> {
-  // Tenant-scoped load (outside tx is fine — we re-read inside).
+  // Tenant-scoped load (outside tx is fine - we re-read inside).
   const existing = await loadMembershipScoped(membershipId, portId);
 
   return await withTransaction(async (tx) => {