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/inline-editable-field.tsx

@@ -51,7 +51,7 @@ export type InlineEditableFieldProps = TextProps | SelectFieldProps | TextareaPr
  * Enter/blur and cancels on Escape.
  */
 export function InlineEditableField(props: InlineEditableFieldProps) {
-  const { value, onSave, placeholder, emptyText = '—', className, disabled } = props;
+  const { value, onSave, placeholder, emptyText = '-', className, disabled } = props;
   const [editing, setEditing] = useState(false);
   const [draft, setDraft] = useState(value ?? '');
   const [saving, setSaving] = useState(false);