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/lib/validators/document-templates.ts

@@ -82,7 +82,7 @@ export type GenerateAndSendInput = z.infer<typeof generateAndSendSchema>;
 export type GenerateAndSignInput = z.infer<typeof generateAndSignSchema>;
 
 // ─── TipTap-based Admin Template Schemas ─────────────────────────────────────
-// Used by /api/v1/admin/templates — the TipTap JSON document store.
+// Used by /api/v1/admin/templates - the TipTap JSON document store.
 
 export const tiptapDocumentTypes = [
   'eoi',