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/m2_tokvec.h

@@ -0,0 +1,43 @@
+// Metin2 地图文本格式的通用解析 —— 对标原客户端 EterBase `LoadMultipleTextData` +
+// `CTokenVectorMap`（`GameLib/Area.cpp`、`PRTerrainLib/TextureSet.cpp` 都用它）。
+//
+// 语义：
+//   - 以空白分隔 token；`"..."` 为单 token；`#` 或 `//` 到行尾是注释。
+//   - 顶层行 `key v1 v2 ...`            -> map[lower(key)] = [v1, v2, ...]
+//   - `Start <Name>` ... `End [<Name>]` -> map[lower(Name)] = [块内所有 token 展平]
+//   - 重复 key：保留第一个，`dup_count` 记录冲突数（W0 报告用）。
+//
+// 无 godot 依赖，纯 C++20，走 CTest。SHINSOO §9-W0 / §5。
+#pragma once
+#include <map>
+#include <string>
+#include <vector>
+
+namespace fmt {
+
+struct TokVecMap {
+    std::map<std::string, std::vector<std::string>> m;
+    int dup_count = 0;                 // 重复 key 次数
+    std::vector<std::string> dup_keys; // 重复的 key 名（去重后）
+
+    bool has(const std::string& key) const;                 // key 已小写
+    const std::vector<std::string>* find(const std::string& key) const;
+    // 便捷取值（key 传入时大小写不敏感）
+    std::string   str(const std::string& key, const std::string& def = "") const;
+    long          inum(const std::string& key, long def = 0) const;
+    double        num(const std::string& key, double def = 0) const;
+};
+
+// 解析整段文本。语法层面不会失败（宽容解析）；err 仅在明显结构错误时写。
+bool parse_tokvec(const std::string& text, TokVecMap& out, std::string* err);
+bool parse_tokvec_file(const std::string& path, TokVecMap& out, std::string* err);
+
+// 小工具：整文件读入字符串。失败返回 false。
+// Whole-file read used by every fmt loader. By default std::ifstream; the host
+// app can install a reader that pulls from res:// (Godot PCK on iOS/Android) via
+// set_file_reader(). The standalone CTests leave it unset -> plain ifstream.
+using FileReader = bool (*)(const std::string& path, std::string& out);
+void set_file_reader(FileReader r); // nullptr resets to the ifstream default
+bool read_file(const std::string& path, std::string& out);
+
+} // namespace fmt