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/document-reminders.ts

@@ -58,7 +58,7 @@ export interface SendReminderOptions {
   /** true = cron auto-fire, enforces 9-16 window + cadence cooldown.
    *  false (default) = manual UI action, bypasses both. */
   auto?: boolean;
-  /** Optional — target a specific pending signer (parallel mode), or
+  /** Optional - target a specific pending signer (parallel mode), or
    *  bypass the lowest-pending default in sequential mode (must still be the
    *  next pending signer in that case). */
   signerId?: string;
@@ -183,7 +183,7 @@ export async function sendReminderIfAllowed(
 /**
  * Cron entry point. Selects in-flight documents whose effective cadence
  * (override or template) is set, then attempts auto-fire on each.
- * `interests.reminderEnabled` is no longer part of the gating — per-doc
+ * `interests.reminderEnabled` is no longer part of the gating - per-doc
  * `remindersDisabled` is the kill switch instead.
  */
 export async function processReminderQueue(portId: string): Promise<void> {