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/minio/index.ts

@@ -37,10 +37,7 @@ export async function ensureBucket(): Promise<void> {
  *
  * Default expiry is 15 minutes (900 seconds) per SECURITY-GUIDELINES.md §7.1.
  */
-export async function getPresignedUrl(
-  objectKey: string,
-  expirySeconds = 900,
-): Promise<string> {
+export async function getPresignedUrl(objectKey: string, expirySeconds = 900): Promise<string> {
   return minioClient.presignedGetObject(BUCKET, objectKey, expirySeconds);
 }
 
@@ -49,7 +46,7 @@ export async function getPresignedUrl(
  *
  * Format: `{portSlug}/{entity}/{entityId}/{fileId}.{extension}`
  *
- * No user-supplied input should ever be used as path components — only UUIDs
+ * No user-supplied input should ever be used as path components - only UUIDs
  * and controlled slugs (SECURITY-GUIDELINES.md §3.4, §7.1).
  */
 export function buildStoragePath(