优化删除键上滑手势的清空逻辑，增加对编辑状态的判断，确保在有拼音输入时仅丢弃当前输入，而非清空全部内容。

app/src/main/java/org/fcitx/fcitx5/android/input/keyboard/CommonKeyActionListener.kt

@@ -164,7 +164,13 @@ class CommonKeyActionListener :
                 }
                 is ClearAllAction -> {
                     backspaceSwipeState = Stopped
-                    service.clearEditorText()
+                    if (preeditState.isEmpty) {
+                        // No composing/preedit: clear entire editor content
+                        service.clearEditorText()
+                    } else {
+                        // Composing present (e.g., pinyin in-progress): discard composition only
+                        service.postFcitxJob { reset() }
+                    }
                 }
                 is PickerSwitchAction -> {
                     // update lastSymbolType only when specified explicitly