Update PR description with calendar color feature documentation

Author: geetduggal

PR_DESCRIPTION.md

@@ -11,6 +11,12 @@ The core insight is that many productivity workflows benefit from the ability to
 
 This feature enables users to maintain their Kanban boards as planning and organization tools while easily moving actionable items to their calendar for time-blocked execution.
 
+## New Features Summary
+
+1. **Copy to Calendar**: Right-click context menu option to copy cards to Full Calendar
+2. **Calendar Color Visual Feedback**: Cards automatically adopt calendar colors when copied
+3. **Board Settings Placement**: Option to place board settings at beginning of file
+
 ## Technical Approach
 
 ### Integration Design
@@ -62,6 +68,29 @@ The implementation includes robust handling for several edge cases:
 - Maintains consistent icon and interaction patterns
 - Provides clear visual feedback for success/failure states
 
+### Visual Feedback System
+The calendar color feature provides immediate visual confirmation when cards are copied to calendars:
+
+**Color Application Process**:
+1. When a card is copied to a calendar, the card's background automatically changes to match the calendar's color
+2. Smart text color calculation ensures optimal contrast (WCAG compliant)
+3. Card colors are stored in board settings and persist across sessions
+4. Colors update automatically when cards are copied to different calendars
+
+**Technical Implementation**:
+- Uses CSS custom properties for dynamic color application
+- Calculates text contrast using WCAG luminance formula
+- Stores color mappings in board settings JSON block
+- Integrates seamlessly with existing color systems (tags, dates)
+- Maintains backward compatibility with existing boards
+
+### Board Settings Enhancement
+Added option to place board settings at the beginning of files instead of the end:
+- Controlled by "Place board settings at beginning" toggle in settings
+- Useful for easier editing of board settings in markdown mode
+- Parser supports reading settings from both locations for compatibility
+- Header settings take precedence if both locations exist
+
 ### Settings Integration
 - **Toggle Control**: Users can enable/disable the feature via plugin settings
 - **Documentation**: Settings include explanation of requirements and configuration file location
@@ -76,13 +105,18 @@ The implementation includes robust handling for several edge cases:
 2. **Enable Feature**: Toggle "Enable Copy to Calendar" in Kanban plugin settings
 3. **Basic Copy**: Right-click on a Kanban card → "Copy to calendar" → Select calendar
 4. **Verify**: Confirm file creation in correct directory with proper frontmatter
+5. **Color Application**: Verify card background changes to match calendar color
+6. **Text Contrast**: Confirm text remains readable on all calendar colors
 
 #### Edge Cases
 1. **Special Characters**: Test with directories containing `*`, `?`, `<`, `>`, `|`, `:`, `"`, `\`, `/`
 2. **Wildcard Patterns**: Test both `/*` wildcard configurations and literal `/*` directory names
 3. **Missing Dependencies**: Test behavior with Full Calendar plugin disabled/uninstalled
 4. **Permission Issues**: Test in directories with restricted write permissions
 5. **File Collisions**: Test duplicate card titles and filename collision handling
+6. **Color Edge Cases**: Test with extreme colors (very light/dark) and transparency
+7. **Multiple Copies**: Test copying same card to different calendars (color should update)
+8. **Settings Placement**: Test board settings at beginning vs end of file
 
 #### Platform Testing
 1. **Mobile**: Verify context menu integration on mobile devices