Initial commit: XinLanDiary dev0.0.7

添加 HUD 画廊/日期面板：右上角页面图标按钮，点击弹出叠层显示当前游戏内日期（Day 1 = 2029年9月3日）。
修复 renpy.pygame.draw.rect 不支持 border_radius 的兼容性问题。

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

game/libs/libs.txt

@@ -0,0 +1,6 @@
+The game/libs/ directory is meant for third-party libraries that ask to be
+put in game/libs.
+
+When this file (game/libs/libs.txt) is present, Ren'Py will load all files
+in libs before any other file in game/, and will ignore the first directory
+name under game/libs when determining the order to load files.