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/gdpr-export-button.tsx

@@ -74,7 +74,7 @@ export function GdprExportButton({ clientId }: { clientId: string }) {
         },
       }),
     onSuccess: () => {
-      toast.success('Export queued — refresh in ~30 seconds');
+      toast.success('Export queued - refresh in ~30 seconds');
       qc.invalidateQueries({ queryKey });
       setEmailOverride('');
     },
@@ -128,7 +128,7 @@ export function GdprExportButton({ clientId }: { clientId: string }) {
                 Email the bundle when ready
               </Label>
               <p className="text-xs text-muted-foreground">
-                Sends a 7-day signed download link to the client&apos;s primary email — or to the
+                Sends a 7-day signed download link to the client&apos;s primary email - or to the
                 override below.
               </p>
               {emailToClient ? (