chore: replace em dashes with hyphens, add no-em-dash rule to CLAUDE.md

web/lib/auditEvents.ts

@@ -4,7 +4,7 @@
  * The page used to hold a map of eleven event types to labels and a second map
  * of seven to colours. The server emits forty-seven. Everything unmapped fell
  * through to the raw string, so one row read "Key Assigned" in green and the
- * next "workflow.schedule_updated" in grey — the same kind of fact in two
+ * next "workflow.schedule_updated" in grey - the same kind of fact in two
  * different formats, which made the column look like it carried a meaning it
  * did not.
  *
@@ -50,7 +50,7 @@ const CATEGORY_LABELS = new Map(AUDIT_CATEGORIES.map((c) => [c.value, c.label]))
  * deleting a workflow are the same weight of act.
  *
  * Stems match with or without their past tense, because the two spellings both
- * occur — `auth_provider.delete` beside `key.deleted`, `workload.stop` beside
+ * occur - `auth_provider.delete` beside `key.deleted`, `workload.stop` beside
  * `workflow.schedule_disabled`. Matching only the past tense left half the
  * destructive events drawn in the same grey as a settings change.
  *
@@ -69,7 +69,7 @@ const TONE_RULES: [RegExp, AuditTone][] = [
 
 /*
  * Only where the derived text is wrong or reads clumsily. Anything absent is
- * derived, which is the point — this list should stay short.
+ * derived, which is the point - this list should stay short.
  */
 const OVERRIDES: Record<string, string> = {
     "key.generation_dispatched": "Key generation requested",