Fix Mail Automation permission: missing entitlement, not an OS bug

Confab.entitlements was missing com.apple.security.automation.apple-events,
so tccd's hardened-runtime policy silently refused to even prompt for
Automation consent to Mail.app — confirmed via tccd's own log, the same
failure class as the earlier Calendar/Contacts entitlement bug. Unhides
the Mail integration (MailTools.isHiddenPendingAppleFix = false).
Live-verified: Request Access now grants successfully on macOS 27 beta 7.

oAI/Views/Screens/SettingsView.swift

@@ -1140,9 +1140,8 @@ It's better to admit "I need more information" or "I cannot do that" than to fak
 
     @ViewBuilder
     private var mailSection: some View {
-        // Hidden while MailTools.isHiddenPendingAppleFix is true — blocked by a confirmed macOS 27
-        // beta bug (first-time Automation consent grants never work), not an app bug. See
-        // feature_mail_applescript_integration in memory. Flip the switch back once fixed.
+        // MailTools.isHiddenPendingAppleFix: was a missing entitlement, not an OS bug — fixed, see
+        // feature_mail_applescript_integration in memory. Kill switch kept as infrastructure.
         if !MailTools.isHiddenPendingAppleFix {
         VStack(alignment: .leading, spacing: 8) {
             HStack(spacing: 8) {