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/world_probe.gd

@@ -0,0 +1,73 @@
+# W1/W2 headless 冒烟：加载 A1，打印 load report + sample_height + 顶视截图。
+#   godot --headless --path project --script world_probe.gd
+extends SceneTree
+
+func _init() -> void:
+	var assets: String = AssetRoot.path()
+	var w: Node = ClassDB.instantiate("Metin2World")
+	if w == null:
+		push_error("Metin2World not registered")
+		quit(1)
+		return
+	w.set("assets_root", assets)
+	w.set("map_path", "OutdoorA1/metin2_map_a1")
+	w.set("auto_load", false)
+	get_root().add_child(w)
+
+	var ok: bool = w.call("load_map")
+	var rep: Dictionary = w.call("get_load_report")
+	print("load_map ok=", ok)
+	for k in rep:
+		print("  ", k, " = ", rep[k])
+
+	var terr: int = 0
+	for c in w.get_children():
+		if String(c.name).begins_with("Terrain_"):
+			terr += 1
+	print("terrain MeshInstance3D children: ", terr)
+
+	var h1: float = w.call("sample_height", 128.0, 128.0)
+	var h_out: float = w.call("sample_height", -50.0, -50.0)
+	print("sample_height(128,128) = ", h1, "   off-map = ", h_out)
+
+	# 顶视正交截图（W2 与 minimap 对齐用）
+	_shot(w, rep)
+
+	var expect: int = int(rep["map_size_x"]) * int(rep["map_size_y"])
+	var pass_ok: bool = ok and terr == expect and int(rep["chunks_failed"]) == 0 \
+		and h1 != 0.0 and h_out == 0.0
+	print("RESULT: ", "PASS" if pass_ok else "FAIL")
+	quit(0 if pass_ok else 1)
+
+func _shot(w: Node, rep: Dictionary) -> void:
+	var msx: float = float(rep["map_size_x"]) * 256.0
+	var msy: float = float(rep["map_size_y"]) * 256.0
+	var cam := Camera3D.new()
+	cam.projection = Camera3D.PROJECTION_ORTHOGONAL
+	cam.size = max(msx, msy) * 1.05
+	cam.position = Vector3(msx * 0.5, 2000.0, msy * 0.5)
+	cam.rotation_degrees = Vector3(-90.0, 0.0, 0.0)
+	cam.far = 5000.0
+	get_root().add_child(cam)
+	cam.make_current()
+	var sun := DirectionalLight3D.new()
+	sun.rotation_degrees = Vector3(-55.0, 35.0, 0.0)
+	get_root().add_child(sun)
+	var env := WorldEnvironment.new()
+	var e := Environment.new()
+	e.background_mode = Environment.BG_COLOR
+	e.background_color = Color(0.1, 0.1, 0.12)
+	e.ambient_light_source = Environment.AMBIENT_SOURCE_COLOR
+	e.ambient_light_color = Color(0.5, 0.5, 0.5)
+	env.environment = e
+	get_root().add_child(env)
+
+	await process_frame
+	await process_frame
+	await process_frame
+	var img := get_root().get_texture().get_image()
+	if img != null:
+		var p := ProjectSettings.globalize_path("res://../test/golden/world-a1-terrain-top.png")
+		DirAccess.make_dir_recursive_absolute(p.get_base_dir())
+		img.save_png(p)
+		print("screenshot -> ", p)