Feat/draggable job queue widget

[Creylay]

Summary

Add draggable functionality to JobQueueWidget with smart positioning and localStorage persistence.

The Job Queue widget can now be moved around the screen by dragging its header. When positioned in the lower half of the viewport, the widget intelligently expands upward to avoid being cut off. Position is automatically persisted to localStorage and restored on page reload. Users can reset to the default position by double-clicking the drag icon.

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Type of Change

• Backend change
• Frontend change
• CI / Workflow change
• Build / Packaging change
• Bug fix
• Documentation

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Changes (by file)

• DashAI/front/src/components/jobs/JobQueueWidget.jsx:
  • Added drag functionality with handleDragStart, handleMouseMove event listeners
  • Implemented smart positioning logic: uses bottom CSS property when widget is in lower half of screen to prevent content cutoff
  • Added localStorage persistence of widget position with JSON serialization
  • Added double-click on drag icon to reset position to default
  • Added DragIndicatorIcon to header with tooltip "Drag to move · Double-click to reset"
  • Added opacity and brightness transitions for visual feedback
  • Used refs (dragRef, isDragging) to track drag state without re-renders
  • Maintained existing auto-expand/collapse behavior on job state changes

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Testing (optional)

• Drag the widget header to different positions on screen
• Verify widget expands upward when dragged to bottom half
• Verify position persists after page reload
• Double-click drag icon to verify position resets to default
• Verify auto-expand still works when jobs are added/completed while dragged

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Notes (optional)

• Drag detection ignores clicks on buttons/icons within the header to prevent accidental triggers
• Uses viewport dimensions (window.innerHeight, window.innerWidth) for responsive smart positioning
• localStorage operations wrapped in try-catch to handle potential quota/security errors
• All strings translated with i18n support