fix: slash-command responses use a message-scoped chatID for structural isolation

Co-authored-by: dj-oyu <68707227+dj-oyu@users.noreply.github.com>

pkg/channels/telegram.go

@@ -475,8 +475,10 @@ func (c *TelegramChannel) handleQuickCommand(ctx context.Context, message telego
 		"peer_id":    peerID,
 	}
 
-	// No "Thinking..." placeholder — send directly via message bus
+	// Use a message-scoped chatID so this response never matches the ongoing
-	c.HandleMessage(fmt.Sprintf("%d", user.ID), fmt.Sprintf("%d", chatID), content, nil, metadata)
+	// LLM task's placeholder or stopThinking entry for this chat.
+	chatIDStr := fmt.Sprintf("%d#%d", chatID, message.MessageID)
+	c.HandleMessage(fmt.Sprintf("%d", user.ID), chatIDStr, content, nil, metadata)
 	return nil
 }
 
@@ -520,6 +522,11 @@ func (c *TelegramChannel) downloadFile(ctx context.Context, fileID, ext string)
 }
 
 func parseChatID(chatIDStr string) (int64, error) {
+	// Strip message-scoped suffix used by quick-command responses.
+	// e.g. "123456789#42" → parse as "123456789"
+	if idx := strings.IndexByte(chatIDStr, '#'); idx >= 0 {
+		chatIDStr = chatIDStr[:idx]
+	}
 	var id int64
 	_, err := fmt.Sscanf(chatIDStr, "%d", &id)
 	return id, err

pkg/channels/telegram_test.go

@@ -86,3 +86,25 @@ func TestDisplayWidth_EmojiIsThree(t *testing.T) {
 		t.Fatalf("displayWidth(stars) = %d, want 15", got)
 	}
 }
+
+func TestParseChatID_Plain(t *testing.T) {
+	id, err := parseChatID("123456789")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if id != 123456789 {
+		t.Errorf("expected 123456789, got %d", id)
+	}
+}
+
+func TestParseChatID_MessageScopedSuffix(t *testing.T) {
+	// Quick-command responses use "chatID#messageID" to ensure uniqueness.
+	// parseChatID must strip the suffix so delivery still works.
+	id, err := parseChatID("123456789#42")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if id != 123456789 {
+		t.Errorf("expected 123456789, got %d", id)
+	}
+}