Fix Request Access button doing nothing: run permission prompt on main thread

requestAccess() was dispatched onto the background queue used for
AppleScript execution, on the assumption that a blocking call needed to
be off-main. That's backwards for AEDeterminePermissionToAutomateTarget's
consent dialog — like this app's existing NSAlert.runModal() calls, it
needs to run on the main thread/run loop to actually display. Off-main,
it silently returned without ever showing a prompt or changing state.

Also added Log.mail diagnostics on both the status-only check and the
prompting call so a future report of "still doesn't work" has an actual
status code to look at instead of starting from scratch.

oAI/Services/AppleMailService.swift

@@ -61,7 +61,9 @@ final class AppleMailService {
     /// the Apple-Events equivalent of `EKEventStore.authorizationStatus(for:)`, reusing the same
     /// `PersonalDataAccessState` enum EventKitService/ContactsService/LocationMapsService use.
     var accessState: PersonalDataAccessState {
-        Self.mapAutomationPermissionStatus(Self.checkMailAutomationPermission(askUserIfNeeded: false))
+        let status = Self.checkMailAutomationPermission(askUserIfNeeded: false)
+        Log.mail.debug("accessState: AEDeterminePermissionToAutomateTarget(askUserIfNeeded: false) returned \(status)")
+        return Self.mapAutomationPermissionStatus(status)
     }
 
     /// Pure mapping from an `AEDeterminePermissionToAutomateTarget` status code to the shared
@@ -75,16 +77,18 @@ final class AppleMailService {
     }
 
     /// Triggers the real macOS "Confab wants to control Mail" Automation permission prompt if
-    /// the user hasn't been asked yet (a no-op if already granted or denied). Blocks until the
-    /// user responds, so this must run off the main thread.
+    /// the user hasn't been asked yet (a no-op if already granted or denied). Deliberately NOT
+    /// dispatched to the background `queue` used for AppleScript execution — the system consent
+    /// prompt needs to be raised from the main thread/run loop to actually display (same as this
+    /// codebase's existing blocking `NSAlert.runModal()` calls); calling it off-main appears to
+    /// silently fail (no dialog, no error, no state change — the exact symptom Rune hit live).
+    /// `AppleMailService` has no explicit actor annotation, so under this project's
+    /// `-default-isolation=MainActor` build setting this method already runs on the main actor.
     @discardableResult
     func requestAccess() async -> Bool {
-        await withCheckedContinuation { continuation in
-            queue.async {
-                let status = Self.checkMailAutomationPermission(askUserIfNeeded: true)
-                continuation.resume(returning: status == 0)
-            }
-        }
+        let status = Self.checkMailAutomationPermission(askUserIfNeeded: true)
+        Log.mail.info("requestAccess: AEDeterminePermissionToAutomateTarget(askUserIfNeeded: true) returned \(status)")
+        return status == 0
     }
 
     private static func checkMailAutomationPermission(askUserIfNeeded: Bool) -> OSStatus {