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/companies/company-columns.tsx

@@ -76,7 +76,7 @@ export function getCompanyColumns({
       enableSorting: false,
       cell: ({ getValue }) => {
         const value = getValue() as string | null;
-        if (!value) return <span className="text-muted-foreground">—</span>;
+        if (!value) return <span className="text-muted-foreground">-</span>;
         return <span className="text-sm">{value}</span>;
       },
     },
@@ -87,7 +87,7 @@ export function getCompanyColumns({
       enableSorting: false,
       cell: ({ getValue }) => {
         const value = getValue() as string | null;
-        if (!value) return <span className="text-muted-foreground">—</span>;
+        if (!value) return <span className="text-muted-foreground">-</span>;
         return <span className="text-sm">{value}</span>;
       },
     },
@@ -98,7 +98,7 @@ export function getCompanyColumns({
       size: 88,
       cell: ({ row }) => {
         const n = row.original.memberCount ?? 0;
-        if (n === 0) return <span className="text-muted-foreground">—</span>;
+        if (n === 0) return <span className="text-muted-foreground">-</span>;
         return <Badge variant="secondary">{n}</Badge>;
       },
     },
@@ -109,7 +109,7 @@ export function getCompanyColumns({
       size: 88,
       cell: ({ row }) => {
         const n = row.original.yachtCount ?? 0;
-        if (n === 0) return <span className="text-muted-foreground">—</span>;
+        if (n === 0) return <span className="text-muted-foreground">-</span>;
         return <Badge variant="secondary">{n}</Badge>;
       },
     },