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/db/schema/insights.ts

@@ -1,5 +1,5 @@
 /**
- * Phase B — operational insight surfaces.
+ * Phase B - operational insight surfaces.
  *
  * - `alerts`: rule-engine-fired actionable cards. The fingerprint column
  *   dedupes re-evaluations of the same condition; the partial unique
@@ -35,12 +35,12 @@ export const alerts = pgTable(
     /** Optional FK target: 'interest', 'reservation', 'document', 'expense', ... */
     entityType: text('entity_type'),
     entityId: text('entity_id'),
-    /** Hash of (rule_id + entity_type + entity_id) — dedupes re-evaluations. */
+    /** Hash of (rule_id + entity_type + entity_id) - dedupes re-evaluations. */
     fingerprint: text('fingerprint').notNull(),
     firedAt: timestamp('fired_at', { withTimezone: true }).notNull().defaultNow(),
     dismissedAt: timestamp('dismissed_at', { withTimezone: true }),
     dismissedBy: text('dismissed_by').references(() => user.id),
-    /** "Someone is on it" — alert stays visible but stops nagging. */
+    /** "Someone is on it" - alert stays visible but stops nagging. */
     acknowledgedAt: timestamp('acknowledged_at', { withTimezone: true }),
     acknowledgedBy: text('acknowledged_by').references(() => user.id),
     /** Set by the engine when the underlying condition no longer fires. */
@@ -49,7 +49,7 @@ export const alerts = pgTable(
     metadata: jsonb('metadata').default({}),
   },
   (table) => [
-    // Only one open alert per (port, fingerprint) — re-evaluation upserts.
+    // Only one open alert per (port, fingerprint) - re-evaluation upserts.
     uniqueIndex('idx_alerts_fingerprint_open')
       .on(table.portId, table.fingerprint)
       .where(sql`resolved_at IS NULL`),
@@ -85,7 +85,7 @@ export type NewAnalyticsSnapshot = typeof analyticsSnapshots.$inferInsert;
 export type AlertSeverity = 'info' | 'warning' | 'critical';
 
 /**
- * Rule IDs in the v1 catalog — keep in sync with `alert-rules.ts`.
+ * Rule IDs in the v1 catalog - keep in sync with `alert-rules.ts`.
  *
  * Two rules from the original spec (`document.expiring_soon`,
  * `audit.suspicious_login`) are deferred until their data sources land: