feat: complete mobile UI implementation

project/ui/quickbar.gd

@@ -8,7 +8,9 @@
 #   # 输入：数字 1..4 -> 本页 0..3，F1..F4 -> 本页 4..7。
 #
 # 技能施放：先发送 M2Client.use_skill(skill_id, target_vid)，再同步
-# M2Client.cast_skill(motion_idx, heading, x_cm, y_cm)（朝向 = 玩家 yaw）。
+# M2Client.cast_skill(motion_idx, heading, x_cm, y_cm)（默认朝向 = 玩家 yaw）。
+# 移动端按住技能按钮时，activate_aimed() 会把拖动方向转换为相同的
+# server heading；校验、冷却和目标选择仍走 activate() 的同一条链路。
 # 冷却：本地预测时长由 SkillTable 提供；GC_SKILL_COOLTIME_END 可提前解锁。
 extends Node
 
@@ -35,6 +37,7 @@ var _slots := []             # 当前页 UI：[{btn, cd, lbl}]
 var _state := []             # 36 个服务端槽：[{kind, id, cd_end:float}]
 var _page := 0
 var _move_from := -1
+var _mobile_mode := false
 
 func setup(m2client: Node, skill_table: RefCounted, parent: Node, player_getter: Callable) -> void:
 	client = m2client
@@ -84,7 +87,38 @@ func assign(slot: int, kind: String, id: int, persist := true) -> bool:
 	_refresh_slot(slot)
 	return true
 
+# Mobile skill pages cannot rely on drag-and-drop into the small PC quickbar.
+# Put a selected skill/item/emote into the first free slot on the current page
+# while keeping the same server-backed CG_QUICKSLOT_ADD path.
+func assign_mobile(kind: String, id: int) -> bool:
+	for slot in SLOTS_PER_PAGE:
+		if _state[_global_slot(slot)].kind == "":
+			return assign(slot, kind, id)
+	return false
+
+func mobile_slot_state(slot: int) -> Dictionary:
+	if slot < 0 or slot >= SLOTS_PER_PAGE:
+		return {}
+	return _state[_global_slot(slot)].duplicate(true)
+
+func mobile_swap(local_a: int, local_b: int) -> bool:
+	if local_a < 0 or local_a >= SLOTS_PER_PAGE or local_b < 0 or local_b >= SLOTS_PER_PAGE:
+		return false
+	if local_a == local_b:
+		return true
+	_swap(local_a, local_b)
+	return true
+
 func activate(slot: int) -> void:
+	_activate_slot(slot, Vector2.ZERO)
+
+## Mobile long-press skill release.  `screen_direction` uses screen space:
+## right is +X and up is -Y.  A zero vector intentionally falls back to the
+## player's current facing, so a long press without a drag is still usable.
+func activate_aimed(slot: int, screen_direction: Vector2) -> void:
+	_activate_slot(slot, screen_direction)
+
+func _activate_slot(slot: int, screen_direction: Vector2) -> void:
 	if slot < 0 or slot >= SLOTS_PER_PAGE:
 		return
 	var global := _global_slot(slot)
@@ -101,6 +135,8 @@ func activate(slot: int) -> void:
 		if p:
 			yaw = fposmod(90.0 - rad_to_deg(p.rotation.y), 360.0)
 			xy = Vector2(p.position.x * CM, -p.position.z * CM)
+			if screen_direction.length() > 0.01:
+				yaw = _aim_heading(p, screen_direction, yaw)
 		var target_vid := 0
 		if client.has_method("get_target"):
 			target_vid = int(client.get_target().get("vid", 0))
@@ -159,6 +195,18 @@ func activate(slot: int) -> void:
 	elif s.kind == "emote" and client.has_method("send_emoticon"):
 		client.send_emoticon(s.id)
 
+func _aim_heading(player_node: Node3D, screen_direction: Vector2, fallback: float) -> float:
+	# Keep the historical POC heading convention as the base and add the
+	# camera-relative drag angle.  This makes an upward drag equal to the
+	# existing one-tap cast, while right/left drags rotate it predictably.
+	var angle_from_up := rad_to_deg(atan2(screen_direction.x, -screen_direction.y))
+	var camera_heading := player_node.rotation.y
+	if net_play and "camera" in net_play and net_play.camera \
+			and net_play.camera.has_method("heading"):
+		camera_heading = float(net_play.camera.heading())
+	var camera_delta := rad_to_deg(camera_heading - player_node.rotation.y)
+	return fposmod(fallback + camera_delta + angle_from_up, 360.0)
+
 # net_play 的 MODE_USE_SKILL 预约进射程后回调（use_skill_hook）——slot 为全局快捷栏
 # 索引。返回是否确实发起了施法（对齐参考端 `if (__UseSkill(slot)) __ClearReservedAction()`）。
 func activate_reserved(global_slot: int) -> bool:
@@ -193,6 +241,14 @@ func toggle_visible() -> void:
 	if _root:
 		_root.visible = not _root.visible
 
+func set_mobile_mode(enabled: bool) -> void:
+	_mobile_mode = enabled
+	if _root:
+		_root.visible = not enabled
+
+func is_mobile_mode() -> bool:
+	return _mobile_mode
+
 func is_visible() -> bool:
 	return _root != null and _root.visible