Define BUTTON_COLORS dictionary and rename DARK_THEME references to DARK_COLORS

[Copilot]

Overview

This PR fixes inconsistencies in the UI theme configuration by defining the BUTTON_COLORS dictionary and correcting undefined variable references in utils/ui_theme.py.

Problem

1. The ModernButton class was referencing BUTTON_COLORS dictionary, but it was not defined in utils/ui_theme.py. While a BUTTON_COLORS dictionary existed in assets/logo.py, it was never imported or used by the UI theme module.

2. The ModernText class was referencing DARK_THEME dictionary which doesn't exist, causing undefined variable errors. The correct dictionary name is DARK_COLORS, which was already defined in the file.

Changes

1. Added BUTTON_COLORS Dictionary

Defined a comprehensive BUTTON_COLORS dictionary in utils/ui_theme.py with color configurations for 6 button styles:

BUTTON_COLORS = {
    'primary': {'bg': '#5E81AC', 'fg': '#ECEFF4', 'active_bg': '#81A1C1'},
    'success': {'bg': '#A3BE8C', 'fg': '#2E3440', 'active_bg': '#B5C9A4'},
    'warning': {'bg': '#EBCB8B', 'fg': '#2E3440', 'active_bg': '#F0D5A0'},
    'danger': {'bg': '#BF616A', 'fg': '#ECEFF4', 'active_bg': '#D08770'},
    'info': {'bg': '#88C0D0', 'fg': '#2E3440', 'active_bg': '#9FCAE0'},
    'secondary': {'bg': '#4C566A', 'fg': '#ECEFF4', 'active_bg': '#5E6B7D'},
}

Each style includes:

• bg: Background color
• fg: Foreground (text) color
• active_bg: Hover/active state background color

2. Fixed DARK_THEME References

Renamed all 5 occurrences of DARK_THEME to DARK_COLORS in the ModernText class:

# Before (undefined variable)
'bg': DARK_THEME['entry_bg'],

# After (correct reference)
'bg': DARK_COLORS['entry_bg'],

Impact

• ✅ ModernButton class now has proper access to button color schemes
• ✅ ModernText class no longer references undefined variables
• ✅ Code is more consistent and maintainable
• ✅ No breaking changes to existing functionality

Testing

• All syntax checks pass
• No DARK_THEME references remain in the codebase
• Existing imports in app.py and test_dark_theme.py remain fully compatible

Original prompt

Define BUTTON_COLORS dictionary with button color configurations for different styles (primary, success, warning, danger, info, secondary) and rename DARK_THEME references to DARK_COLORS which is already defined.

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