feat: 项目初始化 + 3D方块世界原型 + AI助搭系统

初始化 monorepo: Go后端(7微服务) + Unity客户端(9模块) + 启动器

HTML5原型: Three.js 3D体素世界, Perlin噪声地形, 原版材质, 22种方块

Minecraft创造模式背包: 双栏布局, 拖拽移动物品, 方向性元件引脚

AI助搭策划文档 + 客户端/服务端骨架 + Docker Compose + CI

.gitignore

@@ -35,10 +35,10 @@ client/Assets/Plugins/Editor/JetBrains*
 .vs/
 .idea/
 
-# Autogenerated solution & project files
-*.csproj
-*.unityproj
-*.sln
+# Autogenerated solution & project files (Unity only)
+client/*.csproj
+client/*.unityproj
+client/*.sln
 *.suo
 *.tmp
 *.user
@@ -51,6 +51,12 @@ client/Assets/Plugins/Editor/JetBrains*
 *.opendb
 *.VC.db
 
+# .NET build artifacts
+**/bin/
+**/obj/
+launcher/PCL-CE/**/bin/
+launcher/PCL-CE/**/obj/
+
 # Unity meta for generated
 *.pidb.meta
 *.pdb.meta
@@ -69,5 +75,10 @@ sysinfo.txt
 Thumbs.db
 desktop.ini
 
+# ===================== .NET SDK (local install) =====================
+.dotnet/
+.nuget/
+.userdata/
+
 # ===================== Docker =====================
 docker-compose.override.yml