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/yachts/yacht-form.tsx

@@ -117,7 +117,7 @@ export function YachtForm({ open, onOpenChange, yacht }: YachtFormProps) {
   const mutation = useMutation({
     mutationFn: async (data: CreateYachtInput) => {
       if (isEdit) {
-        // updateYachtSchema omits owner + tagIds — strip them from PATCH body.
+        // updateYachtSchema omits owner + tagIds - strip them from PATCH body.
         const { owner: _owner, tagIds: _tIds, ...rest } = data;
         void _owner;
         void _tIds;