Metin2 game client (P0–P11) + mobile asset pipeline

Networked client on the existing Godot 4.7 + libgr2 renderer:
- net: m2dev wire protocol (libsodium KX + XChaCha20), auth/select/game
  phases, EntityStore world model, ~all GC/CG headers. char create/delete,
  private shop / mall / cube, SHOP_GC_START_EX, guild, party (+ CG_PARTY_SET_STATE),
  quests, dragon soul, refine, safebox, exchange.
- UI: in-game windows migrated 1:1 from the reference uiscript/root .py —
  char status (/stat), inventory+equipment, select-item ([SELECT_ITEM] quest
  token), system-option + game-option + ESC system menu, private-shop 39-grid,
  party info board, shop tabs, atlas, minimap, quickbar, chat, …
- EterGrnLib polish: GR2 material blend/two-sided, LOD crossfade, motion-event
  dispatch, contact shadow, ray-AABB picking, weapon grip pre-transform.

Portable asset IO (A1) — all extension/libgr2/formats/mtproto reads routed
through godot::FileAccess (res:// PCK works on iOS/Android); standalone-lib
*_path() kept for the non-Godot CTests. AssetResolver + PropertyRegistry
switched to a baked index (bake_asset_index.gd) instead of std::filesystem.

Mobile builds: build-{android,ios}.sh, export-android.sh, pack-assets.sh,
gen-debug-keystore.sh. Assets ship as a zip mounted at runtime by
project/asset_pack.gd (adb push now; HTTP download is a drop-in later).

ctest 10/10, 34 GDScript suites, macOS/iOS/Android all build.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013EJxkHiNKS4kybHS3XKyAJ

project/ui/mall_ui.gd

@@ -0,0 +1,104 @@
+# MallUI (첫 버전) —— 道具商城仓库窗（창고몰 / item-mall storage）。
+#
+#   var mu := preload("res://ui/mall_ui.gd").new()
+#   add_child(mu)
+#   mu.setup(m2client, canvas_parent, proto)   # proto 可空
+#
+# `mall_opened` → 显示；`mall_changed` → 刷新。列出商城道具 + [取出]（放进背包第一个空格）。
+extends Node
+
+var client: Node
+var proto: Node
+var _root: Control
+var _list: VBoxContainer
+var _title: Label
+
+func setup(m2client: Node, parent: Node, proto_node: Node = null) -> void:
+	client = m2client
+	proto = proto_node
+	_build(parent)
+	if client.has_signal("mall_opened"):
+		client.mall_opened.connect(func(_s): refresh())
+	if client.has_signal("mall_changed"):
+		client.mall_changed.connect(refresh)
+
+func is_open() -> bool:
+	return _root != null and _root.visible
+
+func _name_of(vnum: int) -> String:
+	if proto and proto.has_method("item"):
+		var d: Dictionary = proto.item(vnum)
+		var n := String(d.get("locale_name", d.get("name", "")))
+		if n != "":
+			return n
+	return "#%d" % vnum
+
+func _first_free_inv() -> int:
+	var used := {}
+	for it in client.get_inventory():
+		used[int(it.get("cell", -1))] = true
+	for i in range(90):
+		if not used.has(i):
+			return i
+	return 0
+
+func refresh() -> void:
+	if client == null or _root == null:
+		return
+	_root.visible = client.is_mall_open()
+	if not _root.visible:
+		return
+	_title.text = "道具商城仓库（%d 格）" % client.get_mall_size()
+	for c in _list.get_children():
+		c.queue_free()
+	var items: Array = client.get_mall_items()
+	if items.is_empty():
+		var e := Label.new()
+		e.text = "（空）"
+		_list.add_child(e)
+		return
+	for it in items:
+		_list.add_child(_row(it))
+
+func _row(it: Dictionary) -> Control:
+	var row := HBoxContainer.new()
+	row.custom_minimum_size = Vector2(300, 0)
+	var nm := Label.new()
+	nm.text = "%s ×%d" % [_name_of(int(it.get("vnum", 0))), int(it.get("count", 1))]
+	nm.custom_minimum_size = Vector2(220, 0)
+	nm.add_theme_font_size_override("font_size", 12)
+	row.add_child(nm)
+	var out := Button.new()
+	out.text = "取出"
+	var cell := int(it.get("cell", 0))
+	out.pressed.connect(func() -> void: client.mall_checkout(cell, 1, _first_free_inv()))
+	row.add_child(out)
+	return row
+
+func _build(parent: Node) -> void:
+	_root = Panel.new()
+	_root.set_anchors_preset(Control.PRESET_CENTER)
+	_root.position = Vector2(140, -180)
+	_root.custom_minimum_size = Vector2(340, 360)
+	_root.size = Vector2(340, 360)
+	_root.visible = false
+	parent.add_child(_root)
+	var box := VBoxContainer.new()
+	box.position = Vector2(16, 14)
+	box.custom_minimum_size = Vector2(308, 0)
+	box.add_theme_constant_override("separation", 6)
+	_root.add_child(box)
+	_title = Label.new()
+	_title.text = "道具商城仓库"
+	_title.add_theme_font_size_override("font_size", 16)
+	box.add_child(_title)
+	var sc := ScrollContainer.new()
+	sc.custom_minimum_size = Vector2(308, 280)
+	box.add_child(sc)
+	_list = VBoxContainer.new()
+	_list.add_theme_constant_override("separation", 4)
+	sc.add_child(_list)
+	var close := Button.new()
+	close.text = "关闭"
+	close.pressed.connect(func() -> void: _root.visible = false)
+	box.add_child(close)