⚙️ Implementation: How to fix broken drag-drop between palettes and canvas in u...

📋 Decision Context

Question:

How to fix broken drag-drop between palettes and canvas in unified-builder?

Task: Fix drag-drop integration in unified-builder

🎯 Decision Made

Chosen:

Created UnifiedDragDropService as bridge between HTML5 native drag and Angular CDK

Options Considered:

• No alternatives documented

💭 Reasoning

Palettes used HTML5 native dragstart with dataTransfer.setData(), but canvas expected Angular CDK cdkDropList. Rather than rewrite all palettes to CDK (breaking change), created a bridge service that stores drag data in signals, allowing drop handlers to retrieve data regardless of drag source. Also added DroppableToolOperations interface for tools that want to handle drops.

📁 Files Involved

• libs/libs-space/unified-builder/src/lib/services/unified-drag-drop.service.ts
• libs/libs-space/unified-builder/src/lib/components/unified-builder/unified-builder.component.ts
• libs/libs-space/unified-builder/src/lib/types/embeddable-tool.interface.ts

🔗 Related

• Decision ID: dev_1768073217672_656alfl
• Session: 35
• Workspace: editor2

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