Customizable Dashboard Layout

[1cbyc]

Implement drag-and-drop dashboard layout customization.

Description

Allow users to customize their dashboard layout by dragging and dropping widgets/cards to their preferred positions.

Acceptance Criteria

• Drag-and-drop functionality
• Save layout preferences
• Multiple layout presets
• Widget visibility toggles
• Responsive layout support

Related

• TODO item #195
• Part of Dashboard UI Improvements (TODO 189-202)