feat: NSIS 中文安装器（年糕历险记-Setup-v0.1.0.exe 实际构建+静默安装验证）、菜单鼠标可见性修复、首页 UI 原版复刻（土质背景/原版按钮/splash/版本角标）、全 goroutine 崩溃兜底

tools/nsis/nsis-3.10/Examples/Splash/Example.nsi

@@ -0,0 +1,21 @@
+Name "Splash.dll test"
+
+OutFile "Splash Test.exe"
+
+XPStyle on
+
+Function .onInit
+	# the plugins dir is automatically deleted when the installer exits
+	InitPluginsDir
+	File /oname=$PLUGINSDIR\splash.bmp "${NSISDIR}\Contrib\Graphics\Wizard\orange-nsis.bmp"
+	#optional
+	#File /oname=$PLUGINSDIR\splash.wav "C:\myprog\sound.wav"
+
+	splash::show 1000 $PLUGINSDIR\splash
+
+	Pop $0 ; $0 has '1' if the user closed the splash screen early,
+			; '0' if everything closed normally, and '-1' if some error occurred.
+FunctionEnd
+
+Section
+SectionEnd