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/reconnect_ui.gd

@@ -0,0 +1,106 @@
+# ReconnectUI (P10) —— 断线遮罩 + 自动重连倒计时 + 手动重连。
+#
+#   var rc := preload("res://ui/reconnect_ui.gd").new()
+#   add_child(rc)
+#   rc.setup(m2client)
+#
+# `disconnected(reason)` → 显示遮罩 + "N 秒后自动重连"；到点调 client.reconnect()。
+# `entered_game` 或任何非 offline 的 phase_changed → 隐藏。
+# 按钮：立即重连 / 停止（不再自动）。
+extends CanvasLayer
+
+const AUTO_DELAY := 5.0
+const MAX_TRIES := 5
+
+var client: Node
+var _panel: ColorRect
+var _msg: Label
+var _count: Label
+var _left := 0.0
+var _tries := 0
+var _auto := true
+var _armed := false
+
+func setup(m2client: Node) -> void:
+	client = m2client
+	layer = 70
+	_build()
+	if client.has_signal("disconnected"):
+		client.disconnected.connect(_on_disconnected)
+	if client.has_signal("entered_game"):
+		client.entered_game.connect(func(): _dismiss())
+	if client.has_signal("phase_changed"):
+		client.phase_changed.connect(func(p):
+			if String(p).to_lower() not in ["offline", "", "close"]:
+				_dismiss())
+
+func is_showing() -> bool:
+	return _panel.visible
+
+func _on_disconnected(reason: String) -> void:
+	_msg.text = "连接断开：%s" % reason
+	_panel.visible = true
+	_armed = true
+	_tries = 0
+	_left = AUTO_DELAY
+
+func _dismiss() -> void:
+	_panel.visible = false
+	_armed = false
+
+func _retry_now() -> void:
+	if client == null or not client.has_method("reconnect"):
+		return
+	_tries += 1
+	_count.text = "重连中…（第 %d 次）" % _tries
+	_left = AUTO_DELAY
+	var ok: bool = client.reconnect()
+	if not ok:
+		_count.text = "重连失败，%0.0f 秒后再试" % AUTO_DELAY
+
+func _process(dt: float) -> void:
+	if not _panel.visible or not _armed:
+		return
+	if not _auto:
+		_count.text = "自动重连已停止"
+		return
+	if _tries >= MAX_TRIES:
+		_count.text = "已重试 %d 次，仍失败" % _tries
+		return
+	_left -= dt
+	_count.text = "%0.0f 秒后自动重连（%d/%d）" % [maxf(_left, 0.0), _tries, MAX_TRIES]
+	if _left <= 0.0:
+		_retry_now()
+
+func _build() -> void:
+	_panel = ColorRect.new()
+	_panel.color = Color(0.05, 0.02, 0.02, 0.92)
+	_panel.set_anchors_preset(Control.PRESET_FULL_RECT)
+	_panel.visible = false
+	add_child(_panel)
+	var box := VBoxContainer.new()
+	box.set_anchors_preset(Control.PRESET_CENTER)
+	box.position = Vector2(-160, -70)
+	box.custom_minimum_size = Vector2(320, 0)
+	box.add_theme_constant_override("separation", 12)
+	_panel.add_child(box)
+	_msg = Label.new()
+	_msg.text = "连接断开"
+	_msg.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+	_msg.add_theme_font_size_override("font_size", 16)
+	box.add_child(_msg)
+	_count = Label.new()
+	_count.text = ""
+	_count.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+	box.add_child(_count)
+	var row := HBoxContainer.new()
+	row.alignment = BoxContainer.ALIGNMENT_CENTER
+	box.add_child(row)
+	var now_btn := Button.new()
+	now_btn.text = "立即重连"
+	now_btn.pressed.connect(_retry_now)
+	row.add_child(now_btn)
+	var stop_btn := Button.new()
+	stop_btn.text = "停止"
+	stop_btn.pressed.connect(func(): _auto = false)
+	row.add_child(stop_btn)