scan-flow: geolocation scan, location-aware SMS throttle (log sender), finder contact, sms_enabled toggle, branding — 19/19 phase-2 scenarios pass

frontend/internal/sms/normalize.go

@@ -0,0 +1,21 @@
+package sms
+
+import "strings"
+
+// NormalizeAU normalises a phone number to international AU format without a
+// leading '+' or zero:
+//
+//	"+61432374487" -> "61432374487"
+//	"0432374487"   -> "61432374487"
+func NormalizeAU(phone string) string {
+	s := strings.Map(func(r rune) rune {
+		if r >= '0' && r <= '9' {
+			return r
+		}
+		return -1
+	}, phone)
+	if strings.HasPrefix(s, "0") && len(s) >= 10 {
+		s = "61" + s[1:]
+	}
+	return s
+}