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-form.tsx

@@ -101,7 +101,7 @@ export function CompanyForm({ open, onOpenChange, company }: CompanyFormProps) {
   const mutation = useMutation({
     mutationFn: async (data: CreateCompanyInput) => {
       if (isEdit) {
-        // updateCompanySchema omits tagIds — strip them from PATCH body.
+        // updateCompanySchema omits tagIds - strip them from PATCH body.
         const { tagIds: _tIds, ...rest } = data;
         void _tIds;
         await apiFetch(`/api/v1/companies/${company!.id}`, {
@@ -178,7 +178,7 @@ export function CompanyForm({ open, onOpenChange, company }: CompanyFormProps) {
                   value={watch('incorporationCountryIso')}
                   onChange={(iso) => {
                     setValue('incorporationCountryIso', iso ?? undefined);
-                    // Wipe subdivision when country flips — codes are country-scoped.
+                    // Wipe subdivision when country flips - codes are country-scoped.
                     setValue('incorporationSubdivisionIso', undefined);
                   }}
                   data-testid="company-incorp-country"