Allow keyboard interruption of i3 speech during terminal handoff

internal/app/speech_worker.go

@@ -45,6 +45,8 @@ type speechRequest struct {
 	presentationGeneration *uint64 // Checked under the speech owner mutex.
 	presentationRevision   *uint64
 
+	InterruptDuringHandoff bool // Desktop speech remains keyboard-interruptible in the delegated terminal.
+
 	Window             atspi.ObjectID
 	IntroducesWindow   bool
 	ReadAll            []readAllPart
@@ -138,6 +140,7 @@ type speechWorker struct {
 	lastInputTimestamp uint32
 	titleWindow        atspi.ObjectID
 	titleInput         titleInputPolicy
+	handoffSpeech      bool   // Armed by accepted desktop speech; cleared by cancellation, including after SPEAK returns.
 	confirmationID     uint64 // Owned under mutex; reset on completion or user interruption.
 	confirmationSerial uint64
 
@@ -253,6 +256,9 @@ func (worker *speechWorker) Enqueue(request speechRequest) {
 		worker.pending = worker.pending[:speechQueueCapacity-1]
 		worker.overflow++
 	}
+	if request.InterruptDuringHandoff {
+		worker.handoffSpeech = true
+	}
 	worker.titleInput.observe(request)
 	worker.presentationRevision++
 	worker.pending = append(worker.pending, request)