backend: X11 后端 window 信息查询接口使用原始封装代替语义化封装

- 拆分 window_get_skip_taskbar / window_get_urgency /
  window_get_states / window_get_geometry_mode 为更底层的
  window_get_atom_array / window_get_wm_hints / atom_to_window_state
- window_get_fixed_size 改为输出参数风格
- 扁平化 window_map_request_event_t，内联原 window_props_t 和
  window_geometry_t 的字段
- window_props_t → window_layer_props_t，仅保留 layer 分类所需的
  types/states

src/core/event.h

@@ -64,9 +64,16 @@ typedef struct pointer_enter_event_t {
 
 typedef struct window_map_request_event_t {
   window_id_t window;
-  window_props_t props;
+  window_id_t transient_for;
+  bool override_redirect;
+  bool skip_taskbar;
+  bool urgent;
+  bool fixed_size;
+  window_geometry_mode_t geometry_mode;
+  rect_t rect;
+
+  window_layer_props_t props;
   window_metadata_t metadata;
-  window_geometry_t geometry;
 } window_map_request_event_t;
 
 typedef enum window_remove_reason_t {

src/core/layer.c

@@ -88,7 +88,7 @@ bool layer_stack_lower(layer_stack_t *layer, window_id_t window) {
   return true;
 }
 
-layer_type_t layer_classify(const window_props_t *props) {
+layer_type_t layer_classify(const window_layer_props_t *props) {
   for (size_t i = 0; i < props->type_count; ++i) {
     window_type_t type = props->types[i];
     if (type == ZDWM_WINDOW_TYPE_NOTIFICATION) return ZDWM_WINDOW_LAYER_OVERLAY;

src/core/layer.h

@@ -57,4 +57,4 @@ bool layer_stack_raise(layer_stack_t *layer, window_id_t window);
  */
 bool layer_stack_lower(layer_stack_t *layer, window_id_t window);
 
-layer_type_t layer_classify(const window_props_t *props);
+layer_type_t layer_classify(const window_layer_props_t *props);

src/core/window.h

@@ -30,19 +30,13 @@ typedef enum window_state_t {
   ZDWM_WINDOW_STATE_STICKY,
 } window_state_t;
 
-typedef struct window_props_t {
-  window_id_t transient_for;
-
-  bool override_redirect;
-  bool skip_taskbar;
-  bool urgent;
-
+typedef struct window_layer_props_t {
   window_type_t *types;
   size_t type_count;
 
   window_state_t *states;
   size_t state_count;
-} window_props_t;
+} window_layer_props_t;
 
 typedef struct window_metadata_t {
   char *title;
@@ -51,9 +45,3 @@ typedef struct window_metadata_t {
   char *class_name;
   char *instance_name;
 } window_metadata_t;
-
-typedef struct window_geometry_t {
-  window_geometry_mode_t mode;
-  rect_t rect;
-  bool fixed_size;
-} window_geometry_t;