Overlay: block new sessions while sending; delay runtime restart

apps/macos/Sources/Clawdis/VoiceWakeOverlay.swift

@@ -13,6 +13,7 @@ final class VoiceWakeOverlayController: ObservableObject {
     enum Source: String { case wakeWord, pushToTalk }
 
     @Published private(set) var model = Model()
+    var isVisible: Bool { self.model.isVisible }
 
     struct Model {
         var text: String = ""
@@ -51,6 +52,10 @@ final class VoiceWakeOverlayController: ObservableObject {
         forwardEnabled: Bool = false,
         isFinal: Bool = false) -> UUID
     {
+        if self.model.isSending {
+            self.logger.log(level: .info, "overlay drop session_start while sending")
+            return self.activeToken ?? UUID()
+        }
         let token = UUID()
         let message = """
         overlay session_start source=\(source.rawValue) \

apps/macos/Sources/Clawdis/VoiceWakeRuntime.swift

@@ -359,7 +359,7 @@ actor VoiceWakeRuntime {
         self.overlayToken = nil
 
         self.cooldownUntil = Date().addingTimeInterval(self.debounceAfterSend)
-        self.restartRecognizer()
+        self.scheduleRestartRecognizer()
     }
 
     // MARK: - Audio level handling
@@ -406,6 +406,18 @@ actor VoiceWakeRuntime {
         }
     }
 
+    private func scheduleRestartRecognizer(delay: TimeInterval = 0.7) {
+        Task { [weak self] in
+            let nanos = UInt64(max(0, delay) * 1_000_000_000)
+            try? await Task.sleep(nanoseconds: nanos)
+            guard let self else { return }
+            if self.isCapturing { return }
+            let overlayVisible = await MainActor.run { VoiceWakeOverlayController.shared.isVisible }
+            if overlayVisible { return }
+            self.restartRecognizer()
+        }
+    }
+
     func applyPushToTalkCooldown() {
         self.cooldownUntil = Date().addingTimeInterval(self.debounceAfterSend)
     }