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_shot.gd

@@ -0,0 +1,58 @@
+# 窗口渲染 + 顶视/斜视截图（W2-W4 视觉核对）。非 headless。
+#   godot --path project --script world_shot.gd --quit-after 90
+extends SceneTree
+
+var _w: Node
+var _frames := 0
+
+func _init() -> void:
+	var assets: String = AssetRoot.path()
+	_w = ClassDB.instantiate("Metin2World")
+	_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("ok=", ok, "  report=", rep)
+
+	var msx: float = float(rep["map_size_x"]) * 256.0
+	var msy: float = float(rep["map_size_y"]) * 256.0
+
+	# 光照 / 天空 / 雾 / 色调由 Metin2World 从 A1.msenv 建（env_ok=%s）
+	print("env_ok=", rep.get("env_ok"), " fog_level=", rep.get("fog_level"))
+
+	var top := Camera3D.new()
+	top.name = "TopCam"
+	top.projection = Camera3D.PROJECTION_ORTHOGONAL
+	top.size = max(msx, msy) * 1.05
+	top.position = Vector3(msx * 0.5, 3000.0, msy * 0.5)
+	top.rotation_degrees = Vector3(-90.0, 0.0, 0.0)
+	top.far = 8000.0
+	get_root().add_child(top)
+
+	var persp := Camera3D.new()
+	persp.name = "PerspCam"
+	persp.fov = 55.0
+	persp.position = Vector3(msx * 0.35, 260.0, msy * 0.62)
+	persp.look_at(Vector3(msx * 0.5, 150.0, msy * 0.45))
+	persp.far = 6000.0
+	get_root().add_child(persp)
+
+	top.make_current()
+
+func _process(_dt: float) -> bool:
+	_frames += 1
+	var outdir: String = ProjectSettings.globalize_path("res://../test/golden")
+	DirAccess.make_dir_recursive_absolute(outdir)
+	if _frames == 6:
+		var img := get_root().get_texture().get_image()
+		img.save_png(outdir + "/world-a1-terrain-top.png")
+		print("saved terrain-top.png ", img.get_size())
+		get_root().get_node("PerspCam").make_current()
+	elif _frames == 12:
+		var img2 := get_root().get_texture().get_image()
+		img2.save_png(outdir + "/world-a1-persp.png")
+		print("saved world-a1-persp.png ", img2.get_size())
+		quit(0)
+	return false