fix: prevent draft ghost bubbles and typing/reaction state leaks

Three related fixes for the draft message overwrite issue:

1. preSend: explicitly dismiss draft (SendDraft with empty text) before
   sending the permanent message. Previously relied on sendMessage to
   auto-replace the draft, which fails when a user message arrives in
   between, leaving a ghost bubble.

2. RecordTypingStop: call old stop() before storing the new entry.
   Without this, preSend for message A consumes message B's typing stop,
   killing B's indicator prematurely.

3. RecordReactionUndo: call old undo() before storing the new entry.
   Same issue as typing - prevents the previous cycle's preSend from
   consuming the next message's reaction undo.

Also clears statusEditTimes on draft dismiss to prevent stale throttle
state from affecting the next processing cycle.

https://claude.ai/code/session_01GeNd28Z7MtXyt2ejP4x2GW

pkg/channels/manager.go

@@ -117,15 +117,35 @@ func (m *Manager) RecordPlaceholder(channel, chatID, placeholderID string) {
 
 // RecordTypingStop registers a typing stop function for later invocation.
 // Implements PlaceholderRecorder.
+//
+// If a previous typing indicator exists for the same chat, it is stopped
+// immediately before the new one is recorded.  This prevents the next
+// preSend (which finalises the *previous* processing cycle) from
+// consuming the *new* message's typing entry.
 func (m *Manager) RecordTypingStop(channel, chatID string, stop func()) {
 	key := channel + ":" + chatID
+	if v, loaded := m.typingStops.Load(key); loaded {
+		if entry, ok := v.(typingEntry); ok {
+			entry.stop() // idempotent
+		}
+	}
 	m.typingStops.Store(key, typingEntry{stop: stop, createdAt: time.Now()})
 }
 
 // RecordReactionUndo registers a reaction undo function for later invocation.
 // Implements PlaceholderRecorder.
+//
+// If a previous reaction exists for the same chat, it is undone immediately
+// before the new one is recorded.  Same rationale as RecordTypingStop: the
+// old entry belongs to the previous processing cycle and must not leak into
+// the next preSend call.
 func (m *Manager) RecordReactionUndo(channel, chatID string, undo func()) {
 	key := channel + ":" + chatID
+	if v, loaded := m.reactionUndos.Load(key); loaded {
+		if entry, ok := v.(reactionEntry); ok {
+			entry.undo() // idempotent
+		}
+	}
 	m.reactionUndos.Store(key, reactionEntry{undo: undo, createdAt: time.Now()})
 }
 
@@ -149,12 +169,17 @@ func (m *Manager) preSend(ctx context.Context, name string, msg bus.OutboundMess
 	}
 
 	// 3. Try editing a tracked status message (from streaming preview).
-	// If the status was draft-based (draftID != 0), just clear the entry —
-	// the final sendMessage will automatically replace the draft bubble.
+	// For draft-based entries, explicitly dismiss the draft bubble before
+	// sending the permanent message.  Without this, a user message sent
+	// between the last draft update and sendMessage may prevent the
+	// platform from auto-replacing the draft, leaving a ghost bubble.
 	if v, loaded := m.statusMsgIDs.LoadAndDelete(key); loaded {
 		if entry, ok := v.(statusMsgEntry); ok {
 			if entry.draftID != 0 {
-				// Draft-based: sendMessage replaces the draft, no edit needed
+				if drafter, ok := ch.(DraftSender); ok {
+					_ = drafter.SendDraft(ctx, msg.ChatID, entry.draftID, "")
+				}
+				m.statusEditTimes.Delete(key)
 			} else if entry.messageID != "" {
 				if editor, ok := ch.(MessageEditor); ok {
 					if err := editor.EditMessage(ctx, msg.ChatID, entry.messageID, msg.Content); err == nil {

pkg/channels/manager_test.go

@@ -1433,3 +1433,105 @@ func TestGenerateDraftID_Stable(t *testing.T) {
 		t.Fatalf("expected different draft IDs for different keys, both got %d", id1)
 	}
 }
+
+// TestPreSend_DismissesDraftBeforeSend verifies that preSend explicitly
+// dismisses a draft-based status bubble (via SendDraft with empty text)
+// before proceeding to send the permanent message.  This prevents ghost
+// draft bubbles when a user message arrives between the last draft update
+// and the final sendMessage.
+func TestPreSend_DismissesDraftBeforeSend(t *testing.T) {
+	m := newTestManager()
+
+	var dismissCalled bool
+	var dismissContent string
+
+	ch := &mockDraftSender{
+		mockChannel: mockChannel{
+			sendFn: func(_ context.Context, _ bus.OutboundMessage) error { return nil },
+		},
+		draftFn: func(_ context.Context, _ string, _ int, content string) error {
+			dismissCalled = true
+			dismissContent = content
+			return nil
+		},
+		editFn:     func(_ context.Context, _, _, _ string) error { return nil },
+		sendWithID: func(_ context.Context, _, _ string) (string, error) { return "", nil },
+	}
+
+	// Store a draft-based status entry (simulates active streaming)
+	m.statusMsgIDs.Store("test:123", statusMsgEntry{draftID: 42, createdAt: time.Now()})
+
+	msg := bus.OutboundMessage{Channel: "test", ChatID: "123", Content: "final response"}
+	edited := m.preSend(context.Background(), "test", msg, ch)
+
+	if edited {
+		t.Fatal("expected preSend to return false for draft-based status")
+	}
+	if !dismissCalled {
+		t.Fatal("expected preSend to call SendDraft to dismiss the draft")
+	}
+	if dismissContent != "" {
+		t.Fatalf("expected empty dismiss content, got %q", dismissContent)
+	}
+}
+
+// TestRecordTypingStop_CleansUpOldEntry verifies that recording a new
+// typing stop function calls the previous stop first.
+func TestRecordTypingStop_CleansUpOldEntry(t *testing.T) {
+	m := newTestManager()
+
+	var oldStopped atomic.Bool
+
+	m.RecordTypingStop("tg", "42", func() { oldStopped.Store(true) })
+
+	// Record a new one — old stop should fire
+	m.RecordTypingStop("tg", "42", func() {})
+
+	if !oldStopped.Load() {
+		t.Fatal("expected old typing stop to be called when new entry is recorded")
+	}
+}
+
+// TestRecordReactionUndo_CleansUpOldEntry verifies that recording a new
+// reaction undo function calls the previous undo first.
+func TestRecordReactionUndo_CleansUpOldEntry(t *testing.T) {
+	m := newTestManager()
+
+	var oldUndone atomic.Bool
+
+	m.RecordReactionUndo("tg", "42", func() { oldUndone.Store(true) })
+
+	// Record a new one — old undo should fire
+	m.RecordReactionUndo("tg", "42", func() {})
+
+	if !oldUndone.Load() {
+		t.Fatal("expected old reaction undo to be called when new entry is recorded")
+	}
+}
+
+// TestPreSend_DraftDismiss_ClearsEditTimes verifies that dismissing a draft
+// in preSend also clears the statusEditTimes entry for that key, preventing
+// stale throttle state from affecting the next processing cycle.
+func TestPreSend_DraftDismiss_ClearsEditTimes(t *testing.T) {
+	m := newTestManager()
+
+	ch := &mockDraftSender{
+		mockChannel: mockChannel{
+			sendFn: func(_ context.Context, _ bus.OutboundMessage) error { return nil },
+		},
+		draftFn:    func(_ context.Context, _ string, _ int, _ string) error { return nil },
+		editFn:     func(_ context.Context, _, _, _ string) error { return nil },
+		sendWithID: func(_ context.Context, _, _ string) (string, error) { return "", nil },
+	}
+
+	key := "test:123"
+	m.statusMsgIDs.Store(key, statusMsgEntry{draftID: 42, createdAt: time.Now()})
+	m.statusEditTimes.Store(key, time.Now())
+
+	msg := bus.OutboundMessage{Channel: "test", ChatID: "123", Content: "final"}
+	m.preSend(context.Background(), "test", msg, ch)
+
+	if _, loaded := m.statusEditTimes.Load(key); loaded {
+		t.Fatal("expected statusEditTimes to be cleared after draft dismiss")
+	}
+}