refactor: 优化代码规范以及跨平台兼容性

- 改善跨平台 UI/系统处理
- 规范类型注解，消除 Pylance 非致命警告

Author: happycola233

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2025 肥宅水水呀
+Copyright (c) 2026 肥宅水水呀
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

requirements.txt

@@ -2,4 +2,4 @@ psutil
 pywin32; sys_platform == "win32"
 requests
 pyperclip
-pypdf
+pypdf

src/tchMaterial-parser.pyw

@@ -1,7 +1,7 @@
 VSVersionInfo(
   ffi=FixedFileInfo(
-    filevers=(3, 2, 0, 0),
-    prodvers=(3, 2, 0, 0),
+    filevers=(3, 3, 0, 0),
+    prodvers=(3, 3, 0, 0),
     mask=0x3f,
     flags=0x0,
     OS=0x4,
@@ -16,12 +16,12 @@ VSVersionInfo(
         [
           StringStruct('CompanyName', '肥宅水水呀'),
           StringStruct('FileDescription', '国家中小学智慧教育平台 资源下载工具'),
-          StringStruct('FileVersion', '3.2.0.0'),
+          StringStruct('FileVersion', '3.3.0.0'),
           StringStruct('InternalName', 'tchMaterial-parser'),
-          StringStruct('LegalCopyright', 'Copyright © 2025 肥宅水水呀'),
+          StringStruct('LegalCopyright', 'Copyright © 2026 肥宅水水呀'),
           StringStruct('OriginalFilename', 'tchMaterial-parser.exe'),
           StringStruct('ProductName', '国家中小学智慧教育平台 资源下载工具'),
-          StringStruct('ProductVersion', '3.2.0.0'),
+          StringStruct('ProductVersion', '3.3.0.0'),
           StringStruct('Comments', '国家中小学智慧教育平台 资源下载工具')
         ]
       )