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

formats/area_data.h

@@ -0,0 +1,54 @@
+// areadata.txt / areaambiencedata.txt / areaproperty.txt —— 每个区块的对象记录。
+// 对标 GameLib/Area.cpp __Load_LoadObject / __Load_LoadAmbience 和
+// MapOutdoorLoad.cpp 的 AreaProperty 解析。SHINSOO §5.3 / §5.6。
+//
+// 坐标系（W0 判明 → W3 修正，2026-08-29）：areadata 的 position 是**地图全局厘米**（不是
+// 区块本地！只有 000000 因为在原点附近才看着像本地）。x 正 = 东，y 负 = 南（幅度 = 距地图
+// 北边缘），随 tile_y 增大而更负。`Area::SetCoordinate` 不偏移，正因为 position 已是全局。
+// 各区块 x∈[tile_x·25600, +25600]、|y|∈[tile_y·25600, +25600]（实测 A1 全 20 区块）。
+// z 是竖直（高度）轴 cm。heightBias 加在 z 上。转换：直接 position_to_godot(x, y, z)。
+#pragma once
+#include <cstdint>
+#include <string>
+#include <vector>
+
+namespace fmt {
+
+struct AreaObject {
+    double   x = 0, y = 0, z = 0;   // 区块本地 cm
+    uint32_t crc = 0;               // property CRC
+    float    yaw = 0, pitch = 0, roll = 0;
+    float    height_bias = 0;
+    std::vector<int> portal_ids;
+};
+
+struct AreaData {
+    int declared_count = 0;             // ObjectCount
+    std::vector<AreaObject> objects;    // 实际解析到的（缺块会跳过，故可能 < declared）
+};
+
+struct AreaAmbienceObject {
+    double   x = 0, y = 0, z = 0;
+    uint32_t crc = 0;
+    float    range = 0;
+};
+struct AreaAmbienceData {
+    int declared_count = 0;
+    std::vector<AreaAmbienceObject> objects;
+};
+
+struct AreaProperty {
+    std::string area_name;   // AreaName（去引号）
+    int         num_water = 0;
+};
+
+bool parse_area_data(const std::string& text, AreaData& out, std::string* err);
+bool parse_area_data_file(const std::string& path, AreaData& out, std::string* err);
+
+bool parse_area_ambience(const std::string& text, AreaAmbienceData& out, std::string* err);
+bool parse_area_ambience_file(const std::string& path, AreaAmbienceData& out, std::string* err);
+
+bool parse_area_property(const std::string& text, AreaProperty& out, std::string* err);
+bool parse_area_property_file(const std::string& path, AreaProperty& out, std::string* err);
+
+} // namespace fmt