Add prototype gameplay loop with character/battlefield assets and server game APIs.

Co-authored-by: Cursor <cursoragent@cursor.com>

.gitignore

@@ -3,6 +3,11 @@ Tools/__pycache__/
 Tools/**/__pycache__/
 Tools/**/*.pyc
 
+# Local API credentials (never commit)
+.env
+Tools/*.env
+Tools/*.env.local
+
 # 混元3D 登录凭证与任务中间文件（勿提交）
 Tools/data/hunyuan/storage_state.json
 Tools/data/hunyuan/status.json
@@ -12,8 +17,12 @@ Tools/data/hunyuan/jobs/
 Tools/model_tools/out_bake/
 Tools/model_tools/**/_low_work/
 
-# 本地输出（按需取消忽略）
-# Tools/output/
+# 本地输出 / 中间产物（勿提交）
+Tools/output/
+AIClient/Assets/Screenshots/
+AIClient/Assets/Screenshots.meta
+AIClient/Assets/Temp/
+AIClient/Assets/Temp.meta
 
 # ===== Unity =====
 AIClient/[Ll]ibrary/
@@ -51,6 +60,7 @@ Tools/cdn_root/
 
 # AIServer
 AIServer/build/
+AIServer/build-g1/
 AIServer/data/*.db
 AIServer/data/*.db-*