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/dashboard/activity-feed.tsx

@@ -58,7 +58,7 @@ function ActivityFeedInner() {
       <CardContent>
         {items.length === 0 ? (
           <p className="text-sm text-muted-foreground">
-            No recent activity yet — your team&apos;s actions (interests created, stages changed,
+            No recent activity yet - your team&apos;s actions (interests created, stages changed,
             invoices sent) will appear here.
           </p>
         ) : (

src/components/dashboard/lead-source-chart.tsx

@@ -56,7 +56,7 @@ export function LeadSourceChart({ range }: Props) {
       ) : !slices.length ? (
         <EmptyState
           title="No interests in range"
-          description="Lights up once new interests are created — tracks where each came from (website, referral, broker)."
+          description="Lights up once new interests are created - tracks where each came from (website, referral, broker)."
         />
       ) : (
         // Percentage radii + center-anchored chart so the pie scales with