[Bug] 部分平台启动器外观不透明度 100% 仍有透明元素

问题描述 | Bug Description

如题。即使不透明度设置为 100%

平台信息：

• HMCL 3.16.0.348
• Windows 11 25H2 10.0.26200.7462
• Java Version: 25.0.1, Azul Systems, Inc.
• JavaFX Version: 25+29
• Prism Pipeline: com.sun.prism.d3d.D3DPipeline

启动器崩溃报告 / 启动器日志文件 | Launcher Crash Report / Launcher Log File

[17:49:40] [@.Launcher.main/INFO] *** HMCL 3.16.0.348 ***
[17:49:40] [@.Launcher.main/INFO] Operating System: Windows 11 25H2 10.0.26200.7462
[17:49:40] [@.Launcher.main/INFO] Processor Identifier: Intel64 Family 6 Model 198 Stepping 2, GenuineIntel
[17:49:40] [@.Launcher.main/INFO] System Architecture: x86-64
[17:49:40] [@.Launcher.main/INFO] Native Encoding: GB18030
[17:49:40] [@.Launcher.main/INFO] JNU Encoding: GBK
[17:49:40] [@.Launcher.main/INFO] Code Page: 936
[17:49:40] [@.Launcher.main/INFO] Java Architecture: x86-64
[17:49:40] [@.Launcher.main/INFO] Java Version: 25.0.1, Azul Systems, Inc.
[17:49:40] [@.Launcher.main/INFO] Java VM Version: OpenJDK 64-Bit Server VM (mixed mode, sharing), Azul Systems, Inc.
[17:49:40] [@.Launcher.main/INFO] Java Home: C:\Program Files\Java\zulu-25
[17:49:40] [@.Launcher.main/INFO] Current Directory: D:\Minecraft\game\common_minecraft_path
[17:49:40] [@.Launcher.main/INFO] HMCL User Home: C:\Users\Mizukoud\AppData\Roaming\.hmcl
[17:49:40] [@.Launcher.main/INFO] HMCL Local Home: D:\Minecraft\game\common_minecraft_path\.hmcl
[17:49:40] [@.Launcher.main/INFO] HMCL Jar Path: D:\Minecraft\game\common_minecraft_path\[HMCL-3.16.0.348.exe
[17:49:40] [@.Launcher.main/INFO] HMCL Log File: D:\Minecraft\game\common_minecraft_path\.hmcl\logs\2026-07-09T17-49-40.log
[17:49:40] [@.Launcher.main/INFO] JVM Max Memory: 1024 MiB
[17:49:40] [@.Launcher.main/INFO] Metaspace: 6.38 MiB
[17:49:40] [@.Launcher.main/INFO] Native Backend: JNA
[17:49:40] [@.Launcher.main/INFO] Zlib Compatible: true
[17:49:40] [@.util.platform.SystemInfo.initialize/INFO] System Info:
 - CPU: Intel Core Ultra 9 275HX (24 Cores)
 - GPU 1: Intel Graphics [Integrated]
 - GPU 2: Unknown
 - GPU 3: NVIDIA GeForce RTX 5080 Laptop [Discrete]
 - GPU 4: Microsoft Graphics
 - GPU 5: Microsoft Graphics
 - GPU 6: Microsoft Graphics
 - GPU 7: Parsec Cloud, Inc. Graphics
 - GPU 8: cvte Graphics
 - GPU 9: Microsoft Graphics
 - Memory: 17.75 GiB / 47.41 GiB (37%)
[17:49:41] [@.Launcher.start/INFO] JavaFX Version: 25+29
[17:49:41] [@.Launcher.start/INFO] Prism Pipeline: com.sun.prism.d3d.D3DPipeline
[17:49:41] [@.Launcher.start/INFO] Dark Mode: true
[17:49:41] [@.Launcher.start/INFO] Reduced Motion: false

No source file or test is named. Start by reproducing the launcher appearance issue on Windows 11 with the listed HMCL, Java, and JavaFX versions, then trace the opacity handling for the affected platform launchers. Done means that setting opacity to 100% removes the reported transparent elements without changing other launcher appearance behavior.