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/net/channel_status.gd

@@ -0,0 +1,103 @@
+# ChannelStatus (P10 收尾) —— 频道负载查询（对齐 CServerStateChecker）。
+#
+#   var cs := preload("res://net/channel_status.gd").new()
+#   add_child(cs)
+#   cs.query(host, port, func(map): ...)   # map: { port:int -> status:int }
+#
+# 明文 TCP（无 libsodium）：连上任一频道端口 → 发 CG_STATE_CHECKER(0x000F,len 4) →
+# 跳过其它包直到 GC_RESPOND_CHANNELSTATUS(0x0010) → 读 int32 count → count × {i16 port, u8 status}。
+# status：0 关 / 1 正常 / 2 忙 / 3 满（Metin2 约定，非在线人数——那要改服务器）。
+extends Node
+
+const CG_STATE_CHECKER := 0x000F
+const GC_RESPOND_CHANNELSTATUS := 0x0010
+
+const STATUS_TEXT := {0: "关闭", 1: "正常", 2: "拥挤", 3: "爆满"}
+
+signal done(status_by_port: Dictionary)
+
+var _peer: StreamPeerTCP
+var _cb: Callable
+var _deadline := 0.0
+var _sent := false
+
+func query(host: String, port: int, callback: Callable = Callable(), timeout_s := 3.0) -> void:
+	_cb = callback
+	_peer = StreamPeerTCP.new()
+	_sent = false
+	_deadline = _now() + timeout_s
+	if _peer.connect_to_host(host, port) != OK:
+		_finish({})
+		return
+	set_process(true)
+
+func text_for(status: int) -> String:
+	return STATUS_TEXT.get(status, "?")
+
+func _now() -> float:
+	return Time.get_ticks_msec() / 1000.0
+
+func _process(_dt: float) -> void:
+	if _peer == null:
+		return
+	_peer.poll()
+	var st := _peer.get_status()
+	if st == StreamPeerTCP.STATUS_ERROR or _now() > _deadline:
+		_finish({})
+		return
+	if st != StreamPeerTCP.STATUS_CONNECTED:
+		return
+	if not _sent:
+		var req := PackedByteArray()
+		req.resize(4)
+		req.encode_u16(0, CG_STATE_CHECKER)
+		req.encode_u16(2, 4)
+		_peer.put_data(req)
+		_sent = true
+	# 攒够一个包就解析
+	_try_parse()
+
+func _try_parse() -> void:
+	var avail := _peer.get_available_bytes()
+	if avail < 4:
+		return
+	# 逐包扫，跳到 RESPOND_CHANNELSTATUS
+	while _peer.get_available_bytes() >= 4:
+		var head: Array = _peer.get_partial_data(4)
+		if head[0] != OK:
+			return
+		var hb: PackedByteArray = head[1]
+		var header := hb.decode_u16(0)
+		var length := hb.decode_u16(2)
+		if header == GC_RESPOND_CHANNELSTATUS:
+			_read_body()
+			return
+		# 别的包：按 length 跳过剩余（已吃掉 4 字节头）
+		var rest := maxi(0, length - 4)
+		if rest > 0:
+			if _peer.get_available_bytes() < rest:
+				return   # 等更多数据（简化：不缓存半包，靠 timeout 兜底）
+			_peer.get_data(rest)
+
+func _read_body() -> void:
+	# 已消费 4 字节头；接着 int32 count + count × {i16 port, u8 status}
+	if _peer.get_available_bytes() < 4:
+		return
+	var cnt_r: Array = _peer.get_data(4)
+	var count: int = (cnt_r[1] as PackedByteArray).decode_s32(0)
+	var out := {}
+	for i in count:
+		if _peer.get_available_bytes() < 3:
+			break
+		var rec: PackedByteArray = _peer.get_data(3)[1]
+		out[rec.decode_s16(0)] = rec.decode_u8(2)
+	_finish(out)
+
+func _finish(m: Dictionary) -> void:
+	set_process(false)
+	if _peer:
+		_peer.disconnect_from_host()
+		_peer = null
+	done.emit(m)
+	if _cb.is_valid():
+		_cb.call(m)