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/v1/clients/[id]/portal-user/route.ts

@@ -19,7 +19,7 @@ const inviteSchema = z.object({
  *
  * Admin creates a portal account for a client and triggers the activation
  * email. Idempotent in spirit: if a portal user already exists for the
- * email, returns 409 — the admin can resend the activation via
+ * email, returns 409 - the admin can resend the activation via
  * ?action=resend.
  */
 export const POST = withAuth(

src/app/api/v1/clients/match-candidates/handlers.ts

@@ -44,7 +44,7 @@ export async function getMatchCandidatesHandler(
     const nameResult = rawName ? normalizeName(rawName) : null;
 
     // If the caller didn't give us anything useful to match on, return empty
-    // — short-circuit rather than scan every client for nothing.
+    // - short-circuit rather than scan every client for nothing.
     if (!email && !phoneResult?.e164 && !nameResult?.surnameToken) {
       return NextResponse.json({ data: [] });
     }
@@ -122,7 +122,7 @@ export async function getMatchCandidatesHandler(
       mediumScore: 50,
     });
 
-    // Only return medium+ — low-confidence noise isn't useful at the
+    // Only return medium+ - low-confidence noise isn't useful at the
     // create-form layer (background scoring queue picks those up).
     const useful = matches.filter((m) => m.confidence !== 'low');
     if (useful.length === 0) {