Implement Customizable Frontend Dashboard with Drag & Drop Widgets

[Copilot]

This PR implements a production-quality, single-page customizable dashboard as requested in the requirements. The dashboard is built with pure HTML, CSS, and vanilla JavaScript (no frameworks) and provides a comprehensive widget-based interface with drag-and-drop functionality.

🎯 Key Features Implemented

Core Dashboard System

• Drag & Drop Grid System: 12-column responsive grid with snap-to-grid positioning and collision detection
• Resizable Widgets: 8-directional resize handles (N/E/S/W + corners) with visual feedback
• Auto-Persistence: Layout and widget configurations automatically saved to localStorage
• Theme System: Light, Dark, AMOLED themes with system preference detection
• Import/Export: Save and share dashboard layouts as JSON files

Widget Library (10 Widgets)

1. Clock Widget: Digital/analog display with timezone support and 12/24-hour formats
2. Weather Widget: Current conditions with offline fallback and mock data
3. Notes Widget: Rich text editor with formatting toolbar and autosave
4. Todo Widget: Task management with filters, statistics, and drag reordering
5. Pomodoro Widget: Focus timer with customizable cycles and notifications
6. Calendar Widget: Mini calendar with quick note functionality
7. Quotes Widget: Inspirational quotes with categories and copy functionality
8. Stocks Widget: Financial data display (extensible placeholder)
9. Links Widget: Bookmark manager with favicon support
10. System Widget: Real-time device and browser information

Accessibility & UX

• WCAG AA Compliance: Full keyboard navigation, ARIA labels, focus management
• Keyboard Shortcuts: Complete keyboard control (Ctrl+N for new widget, arrow keys for movement, etc.)
• Context Menus: Right-click actions for widget management
• Responsive Design: Works seamlessly on desktop, tablet, and mobile
• Smooth Animations: Spring physics and micro-interactions with reduced motion support

🏗️ Technical Architecture

File Structure

dashboard/
├── index.html              # Main application
├── assets/
│   ├── favicon.svg         # App icon
│   └── icons.svg          # SVG sprite sheet
├── css/
│   ├── base.css           # Variables, reset, utilities
│   ├── layout.css         # Grid system, responsive layout
│   ├── components.css     # UI components (buttons, modals, forms)
│   ├── widgets.css        # Widget-specific styles
│   ├── themes.css         # Theme definitions
│   └── animations.css     # Animations and transitions
└── js/
    ├── main.js            # Application entry point
    ├── state.js           # State management and persistence
    ├── grid.js            # Drag/drop/resize system
    ├── ui.js              # UI components and interactions
    └── widgets/           # Individual widget modules

Design Patterns

• ES6 Modules: Clean separation of concerns with modern JavaScript
• Event-Driven Architecture: Pub/sub pattern for loose coupling
• State Management: Centralized state with automatic persistence
• Component-Based: Self-contained widget architecture

🎨 Visual Design

The dashboard features a modern, clean design with:

• 8-point spacing system for consistent layout
• CSS custom properties for comprehensive theming
• Glassmorphism effects with backdrop-filter support
• Soft shadows and rounded corners for a polished appearance
• Smooth animations with spring physics and easing

🚀 Usage

The dashboard works immediately without any build process:

1. Open dashboard/index.html in any modern browser
2. Drag widgets to rearrange the layout
3. Resize widgets using the corner/edge handles
4. Add new widgets via the "Add Widget" button
5. Customize themes and settings via the UI

For development, serve via HTTP:

cd dashboard && python3 -m http.server 8080

📋 Acceptance Criteria Met

✅ Drag, drop, resize with grid snapping and collision prevention
✅ LocalStorage persistence for layout and widget configs
✅ Add/Remove/Clone widgets + per-widget settings modal
✅ Light/Dark/AMOLED themes + prefers-reduced-motion respected
✅ Keyboard accessibility: move/resize, focus management, ARIA, Esc to close modals
✅ Animations: smooth micro-interactions, no layout jank
✅ Offline fallback for API-based widgets
✅ No external JS UI framework used

The implementation provides a solid foundation that can be easily extended with additional widgets and features while maintaining the established patterns and performance characteristics.

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Project	Deployment	Preview	Comments	Updated (UTC)
study-together	Ready	Preview	Comment	Aug 21, 2025 3:27pm

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