codeant-ai-for-open-source[bot] commented on PR #38563:
URL: https://github.com/apache/superset/pull/38563#issuecomment-4048780711
## **Sequence Diagram**
This PR migrates frontend mounting to React 18 roots and updates chart
overlay rendering to use root-based mount and unmount behavior. It also
replaces legacy sortable logic with dnd kit so collection items reorder through
a drag handle and emit updated order.
```mermaid
sequenceDiagram
participant Browser
participant FrontendBootstrap
participant ReactRoot
participant App
participant User
participant CollectionControl
participant DndKit
participant ChartLayer
Browser->>FrontendBootstrap: Load frontend entry
FrontendBootstrap->>ReactRoot: Create root at mount point
ReactRoot->>App: Render app tree
User->>CollectionControl: Drag item by handle
CollectionControl->>DndKit: Track drag and compute new order
DndKit-->>CollectionControl: Return reordered item ids
CollectionControl-->>App: Emit updated collection value
App->>ChartLayer: Render or update map chart markers
ChartLayer->>ReactRoot: Render chart roots and unmount removed roots
```
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