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/components/clients/client-detail-header.tsx

@@ -169,7 +169,7 @@ export function ClientDetailHeader({ client }: ClientDetailHeaderProps) {
             )}
           </div>
 
-          {/* Top-right: archive/restore as a small icon button — destructive
+          {/* Top-right: archive/restore as a small icon button - destructive
               action sits out of the primary action flow. */}
           <button
             type="button"