# TaskStatusBadge Custom Colors Implementation

## Overview
Updated the `TaskStatusBadge` component to support custom colors for custom task statuses while maintaining backward compatibility with system statuses.

## Changes Made

### Component Updates

**File: `frontend/src/components/task/TaskStatusBadge.vue`**

#### Key Features:
1. **Dual Mode Support**: Component now accepts either a string (system status) or a status object with color property
2. **Custom Color Application**: When a status object with color is provided, applies the custom background color
3. **Contrast Calculation**: Automatically calculates whether to use black or white text based on background luminance
4. **Backward Compatibility**: Existing usage with string statuses continues to work with default variant styling

#### Implementation Details:

```typescript
interface StatusObject {
  id: string
  name: string
  color?: string
  is_system?: boolean
}

interface Props {
  status: string | StatusObject
  compact?: boolean
}
```

**Contrast Color Algorithm:**
- Uses WCAG relative luminance formula: `(0.299 * R + 0.587 * G + 0.114 * B) / 255`
- Returns black text for light backgrounds (luminance > 0.5)
- Returns white text for dark backgrounds (luminance ≤ 0.5)

**Rendering Logic:**
- If status has no color property → Use Badge component with variant styling
- If status has color property → Render custom div with inline styles

## Usage Examples

### System Status (String)
```vue
<TaskStatusBadge status="in_progress" />
<TaskStatusBadge status="approved" :compact="true" />
```

### Custom Status (Object)
```vue
<TaskStatusBadge 
  :status="{ 
    id: 'custom_1', 
    name: 'Ready for Review', 
    color: '#3b82f6' 
  }" 
/>
```

### Mixed Usage
```vue
<!-- System status -->
<TaskStatusBadge status="not_started" />

<!-- Custom status with color -->
<TaskStatusBadge 
  :status="customStatus" 
/>
```

## Testing

Created test file: `frontend/test-task-status-badge-custom-colors.html`

Test cases cover:
1. ✅ System statuses with default variant styling
2. ✅ Custom status objects with various colors
3. ✅ Light background colors (verifying black text)
4. ✅ Dark background colors (verifying white text)
5. ✅ Compact mode with custom colors

## Requirements Validated

- ✅ **Requirement 7.1**: Accept status object with color property
- ✅ **Requirement 7.2**: Apply custom background color from status
- ✅ **Requirement 7.3**: Calculate contrast color for text (black or white)
- ✅ Maintain existing styling for system statuses
- ✅ Backward compatibility with string status values

## Next Steps

The following components will need to be updated to pass status objects instead of strings:
1. `EditableTaskStatus.vue` - Task status dropdown
2. `TaskStatusFilter.vue` - Asset task status filter
3. `ShotTaskStatusFilter.vue` - Shot task status filter
4. `TaskBulkActionsMenu.vue` - Bulk status update

These updates are covered in subsequent tasks (18-20) in the implementation plan.

## Technical Notes

### Color Format
- Expects hex color format: `#RRGGBB`
- Handles colors with or without `#` prefix
- Validates RGB values for contrast calculation

### Styling Consistency
- Custom colored badges maintain same dimensions as system badges
- Uses same border radius, padding, and font styling
- Includes focus ring styles for accessibility

### Performance
- Contrast calculation is computed property (cached)
- No external dependencies for color manipulation
- Minimal overhead for system statuses (no calculation needed)