修复部分控件在深色模式下颜色异常的问题

[Glavo]

No description provided.

[Copilot]

Pull request overview

This PR systematically fixes color rendering issues in dark mode by refactoring hardcoded colors to use CSS theme variables. The changes introduce a brightness-specific stylesheet system and migrate color values from Java code to CSS, ensuring proper theming support across light and dark modes.

Key Changes

• Introduced brightness-specific stylesheets: Created brightness-light.css and brightness-dark.css files with -fixed- prefixed CSS variables for colors that differ between light and dark modes
• Removed hardcoded colors from Java: Eliminated direct color assignments in Java code (e.g., Color.web("#0070E0")) in favor of CSS styling
• Enhanced dynamic color binding: Implemented proper property binding for UI elements that need to react to theme changes (e.g., title text fill)

Reviewed changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
HMCLCore/src/main/java/org/jackhuang/hmcl/util/Log4jLevel.java	Removed unused Color constants and getColor() method from enum
HMCL/src/main/resources/assets/css/root.css	Replaced hardcoded color values with CSS theme variables; added brightness-agnostic styles
HMCL/src/main/resources/assets/css/brightness-light.css	New file defining light mode specific colors using -fixed- prefix
HMCL/src/main/resources/assets/css/brightness-dark.css	New file defining dark mode specific colors using -fixed- prefix
HMCL/src/main/resources/assets/css/blue.css	Removed hardcoded -warning-tag-background (now in brightness files)
HMCL/src/main/java/org/jackhuang/hmcl/ui/terracotta/TerracottaControllerPage.java	Added style classes for CSS targeting; contains one hardcoded color that needs fixing
HMCL/src/main/java/org/jackhuang/hmcl/ui/main/MainPage.java	Bound title text fill to dynamic theme property
HMCL/src/main/java/org/jackhuang/hmcl/ui/decorator/DecoratorSkin.java	Bound title text fill to dynamic theme property
HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/IconedMenuItem.java	Added size limiting for icon consistency
HMCL/src/main/java/org/jackhuang/hmcl/ui/LogWindow.java	Migrated log level colors from Java to CSS class-based styling
HMCL/src/main/java/org/jackhuang/hmcl/ui/FXUtils.java	Removed hardcoded hyperlink color to use CSS styling
HMCL/src/main/java/org/jackhuang/hmcl/theme/Themes.java	Implemented dynamic title fill property with transparency support
HMCL/src/main/java/org/jackhuang/hmcl/setting/StyleSheets.java	Added brightness stylesheet loading and update logic
HMCL/src/main/java/com/jfoenix/skins/JFXCustomColorPickerDialog.java	Commented out hardcoded color logic (replaced by CSS)
HMCL/src/main/java/com/jfoenix/skins/JFXColorPickerSkin.java	Refactored to use properties for proper binding and CSS compatibility

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