Step 3: Kanban Board with daisyUI Styling

## Code Review: PASS ### Changes Reviewed **New Stimulus Controllers:** 1. **`column_nav_controller.js` (89 lines):** - Jump-to-column dropdown with smooth scroll - Column collapse/expand with animated icons - Board progress bar (completed/total ratio) - Updates column counts dynamically 2. **`kanban_filter_controller.js` (181 lines):** - Persistent filters via localStorage - Priority and ticket type dropdown filters - Focus mode (single column view) - Active filter tags as removable badges - Reset filters button - Updates column counts based on visible cards 3. **`undo_toast_controller.js` (127 lines):** - Shows undo toast after successful drag-drop - 5-second window to undo - Reverse transition mapping for undo - API call to reverse transition - Smooth animations for card return **Enhanced `kanban_controller.js`:** - Event delegation for dynamic cards - Enhanced visual feedback (opacity, scale, shadow) - Green ring highlight on destination column - Keyboard support (Escape to cancel drag) - Return to original position on failed transitions - Undo toast integration **Helper Methods (application_helper.rb):** - `column_status_styles()` - Status-specific color schemes - `status_icon()` - SVG icons for each status - `ticket_aging_status()` - New/Xh/Xd badge - `priority_border_color()` - Color-coded borders (critical=red, high=orange, medium=yellow) - `ticket_type_badge_class()` - Type-specific colors (epic=purple, story=blue, bug=red) - `agent_avatar_color()` - Consistent color from name hash **Enhanced Kanban Card (_kanban_card.html.haml):** - Ticket ID, priority dot, aging badge - Epic progress bar (completed/total subtasks) - Ticket type badge with color coding - Subtasks count, comments count, blocked badge - Assignee avatar with consistent color - Project badge (all-projects mode) - Rework count indicator - Epic subtask connector visual ### Acceptance Criteria Met - ✓ Column counts and controls added (jump-to, collapse/expand) - ✓ Cards redesigned with rich info (badges, avatars, aging) - ✓ Drag-drop has visual feedback and undo functionality - ✓ Filtering is persistent with saved views (localStorage) - ✓ Epic column enhanced with progress visualization ### Code Quality Notes - Clean separation of concerns (3 new focused controllers) - Event delegation for dynamic content - Proper localStorage handling for persistence - Consistent color theming throughout - Smooth animations and transitions - Accessibility considerations (keyboard support)