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/services/ocr-config.service.ts

@@ -1,5 +1,5 @@
 /**
- * OCR provider config — stored in `system_settings` under the key
+ * OCR provider config - stored in `system_settings` under the key
  * `ocr.config`. Each port can either have its own row (port_id = port.id)
  * or opt into the global row (port_id = null) by setting `useGlobal: true`.
  */
@@ -22,7 +22,7 @@ export const DEFAULT_MODEL: Record<OcrProvider, string> = {
   claude: 'claude-haiku-4-5',
 };
 
-/** Public shape that admin UIs read — never includes the raw key. */
+/** Public shape that admin UIs read - never includes the raw key. */
 export interface OcrConfigPublic {
   provider: OcrProvider;
   model: string;
@@ -38,7 +38,7 @@ export interface OcrConfigPublic {
   aiEnabled: boolean;
 }
 
-/** Internal shape including the decrypted key — server-side only. */
+/** Internal shape including the decrypted key - server-side only. */
 export interface OcrConfigResolved extends OcrConfigPublic {
   apiKey: string | null;
   /** Source of the resolved row: 'port' | 'global' | 'none'. */
@@ -115,7 +115,7 @@ export async function getResolvedOcrConfig(portId: string): Promise<OcrConfigRes
   };
 }
 
-/** Public-safe view for the admin UI — same shape but never the key. */
+/** Public-safe view for the admin UI - same shape but never the key. */
 export async function getPublicOcrConfig(portId: string | null): Promise<OcrConfigPublic> {
   const row = await readRow(portId);
   if (!row) {