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/phone-input.tsx

@@ -11,7 +11,7 @@ import { detectDefaultCountry, type CountryCode } from '@/lib/i18n/countries';
 export interface PhoneInputValue {
   /** E.164 form ('+442079460958'). Null when empty or unparseable. */
   e164: string | null;
-  /** Country selected in the dropdown — drives the AsYouType formatter. */
+  /** Country selected in the dropdown - drives the AsYouType formatter. */
   country: CountryCode;
 }
 
@@ -32,7 +32,7 @@ interface PhoneInputProps {
  * Phone input with a country flag dropdown + format-as-you-type.
  *
  * Wire shape: emits `{ e164, country }` on every change. E.164 is null
- * while the input is too short to parse — that's a form-validation
+ * while the input is too short to parse - that's a form-validation
  * concern, not an input concern. Pasting an international number
  * (`+1 415…`) auto-switches the country dropdown to match.
  *
@@ -62,7 +62,7 @@ export function PhoneInput({
     const parsed = parsePhone(value.e164, value.country);
     return parsed.national ?? '';
   });
-  // Track whether the user has typed since mount — keeps a controlled-from-props
+  // Track whether the user has typed since mount - keeps a controlled-from-props
   // value sync on first render only.
   const initialized = useRef(false);
 
@@ -78,7 +78,7 @@ export function PhoneInput({
 
   function handleInput(raw: string) {
     // Paste-detect: if user pasted an international format, parse it
-    // and flip the country dropdown to match — better UX than asking
+    // and flip the country dropdown to match - better UX than asking
     // them to also click the dropdown.
     if (raw.startsWith('+')) {
       const parsed = parsePhone(raw);