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

server/internal/notify/smtp.go

@@ -10,7 +10,7 @@ import (
 // dispatchSMTP delivers a state change over one channel's own SMTP settings.
 //
 // The transport, the envelope and the look of the message all live in
-// shared/mail, which admin and sitesvc use too — a Vantage alert and a Vantage
+// shared/mail, which admin and sitesvc use too - a Vantage alert and a Vantage
 // licence email should not look like they came from different products. This
 // function only turns a channel document into a Sender.
 func dispatchSMTP(ch models.NotificationChannel, ev Event) error {

server/internal/notify/vuln.go

@@ -16,7 +16,7 @@ const TypeVuln = "vulnerability"
 //
 // One per rule per scan, never one per finding: a database refresh can open
 // several hundred at once, and a message each would rate-limit the webhook or
-// get the channel muted — either way the alerts stop being read.
+// get the channel muted - either way the alerts stop being read.
 type VulnDigest struct {
 	InstanceName string
 	RuleName     string
@@ -74,7 +74,7 @@ func vulnLines(d VulnDigest) string {
 		if r.FixedIn != "" {
 			fix = "fixed in " + r.FixedIn
 		}
-		s += fmt.Sprintf("\n• %s (%s) — %s on %s, %s", r.CVEID, r.Severity, r.PackageName, r.ServerName, fix)
+		s += fmt.Sprintf("\n• %s (%s) - %s on %s, %s", r.CVEID, r.Severity, r.PackageName, r.ServerName, fix)
 	}
 	if d.More > 0 {
 		s += fmt.Sprintf("\n…and %d more.", d.More)