chore: 为 Swagger UI 添加深色主题支持

[joesdu]

📝 描述 (Description)

为 Swagger UI 添加深色主题支持

🔗 相关问题 (Related Issues)

• Closes #
• Fixes #

🏷️ 变更类型 (Type of Change)

• 🐛 错误修复 (Bug fix) (non-breaking change which fixes an issue)
• ✨ 新功能 (New feature) (non-breaking change which adds functionality)
• 💥 破坏性变更 (Breaking change) (fix or feature that would cause existing functionality to not work as expected)
• 📚 文档更新 (Documentation update)
• 🔧 重构 (Refactor) (no functional changes)
• 🧪 测试 (Tests) (adding or updating tests)
• 🛠️ 构建/CI 变更 (Build/CI changes)
• 🎨 样式变更 (Style changes) (formatting, etc.)
• 🚀 性能改进 (Performance improvements)
• 🔒 安全改进 (Security improvements)

✅ 检查清单 (Checklist)

• 我的代码遵循项目的编码标准 (My code follows the project's coding standards)
• 我已经对自己的代码进行了自我审查 (I have performed a self-review of my own code)
• 我已经在难以理解的区域注释了我的代码 (I have commented my code, particularly in hard-to-understand areas)
• 我已经对文档进行了相应的更改 (I have made corresponding changes to the documentation)
• 我的更改不会产生新的警告或错误 (My changes generate no new warnings or errors)
• 我已经添加了证明我的修复有效或我的功能工作的测试 (I have added tests that prove my fix is effective or that my feature works)
• 新增和现有的单元测试在本地通过我的更改 (New and existing unit tests pass locally with my changes)
• 任何依赖变更都已合并并发布到下游模块 (Any dependent changes have been merged and published in downstream modules)

🧪 测试 (Testing)

• 单元测试 (Unit tests)
• 集成测试 (Integration tests)
• 手动测试 (Manual testing)
• 其他 (请指定) (Other (please specify)):

📸 截图 (如果适用) (Screenshots (if applicable))

🔍 附加说明 (Additional Notes)

[Copilot]

Pull Request Overview

This PR adds dark theme support to Swagger UI with a theme toggle button, allowing users to switch between light and dark modes. The implementation includes localStorage persistence and system preference detection.

Key changes:

• Created a custom CSS file with comprehensive dark theme styling using GitHub Dark color scheme
• Implemented a JavaScript theme toggle with localStorage persistence and system preference detection
• Integrated the custom CSS and JavaScript into Swagger UI configuration

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
sample/WebApi.Test.Unit/wwwroot/swagger-ui/theme-toggle.js	New JavaScript file implementing theme toggle functionality with localStorage persistence and system preference detection
sample/WebApi.Test.Unit/wwwroot/swagger-ui/custom.css	New CSS file defining dark theme styles for all Swagger UI components using CSS custom properties
sample/WebApi.Test.Unit/ServiceModules/SwaggerModule.cs	Updated Swagger configuration to inject custom CSS and JavaScript files
sample/WebApi.Test.Unit/Script.js	Code formatting changes (quotes, indentation) - no functional changes
sample/WebApi.Test.Unit/AppWebModule.cs	Added static file middleware to serve wwwroot files