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/audit.ts

@@ -53,7 +53,7 @@ const SENSITIVE_FIELDS = new Set(['email', 'phone', 'password', 'credentials_enc
  * Masks sensitive field values to prevent PII or secrets from being stored
  * verbatim in the audit log (SECURITY-GUIDELINES.md §5.2).
  *
- * Strings are replaced with a partial mask — first 2 chars + *** + last 2 chars.
+ * Strings are replaced with a partial mask - first 2 chars + *** + last 2 chars.
  */
 export function maskSensitiveFields(
   data?: Record<string, unknown>,
@@ -89,7 +89,7 @@ export function diffFields(
 /**
  * Inserts an audit log entry into the database.
  *
- * This function NEVER throws — errors are caught and logged so that an audit
+ * This function NEVER throws - errors are caught and logged so that an audit
  * failure never rolls back or disrupts the parent operation.
  */
 export async function createAuditLog(params: AuditLogParams): Promise<void> {