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/shared/data-view.tsx

@@ -20,7 +20,7 @@ import {
  * Filters and sort live above the rendered rows; callers pass them as
  * `headerSlot`. On desktop the rows are sortable via column header clicks
  * (TanStack default); on mobile, sort is exposed via a `<Drawer>` opened by
- * the caller's headerSlot — this primitive doesn't enforce a sort UI.
+ * the caller's headerSlot - this primitive doesn't enforce a sort UI.
  */
 export function DataView<TData>({
   table,