[backport core/1.34] fix: inner groups being moved double when moving outer group (in vue mode) (#7525)

## Summary

Backport of #7447 to core/1.34.

Fixes issue when dragging a group that had inner groups when in vue
mode.

When dragging the outer group in Vue mode:

1. getAllNestedItems(selected) returns ALL items: outer group + inner
groups + nodes
2. moveChildNodesInGroupVueMode loops through all items
3. For outer group G1: calls G1.move(delta, true) then
moveGroupChildren(G1, ...)
4. moveGroupChildren calls G2.move(delta) (no skipChildren) - this moves
G2 AND G2's children!
5. Then the loop reaches G2: calls G2.move(delta, true) - moves G2 again
6. Plus moveGroupChildren(G2, ...) processes G2's children again

This PR fixes it by adding `skipChildren=true` to the `move` call.

browser_tests/assets/groups/nested-groups-1-inner-node.json

@@ -0,0 +1,92 @@
+{
+  "id": "2ba0b800-2f13-4f21-b8d6-c6cdb0152cae",
+  "revision": 0,
+  "last_node_id": 17,
+  "last_link_id": 9,
+  "nodes": [
+    {
+      "id": 17,
+      "type": "VAEDecode",
+      "pos": [
+        318.8446183157076,
+        355.3961392345528
+      ],
+      "size": [
+        225,
+        102
+      ],
+      "flags": {},
+      "order": 0,
+      "mode": 0,
+      "inputs": [
+        {
+          "name": "samples",
+          "type": "LATENT",
+          "link": null
+        },
+        {
+          "name": "vae",
+          "type": "VAE",
+          "link": null
+        }
+      ],
+      "outputs": [
+        {
+          "name": "IMAGE",
+          "type": "IMAGE",
+          "links": null
+        }
+      ],
+      "properties": {
+        "Node name for S&R": "VAEDecode"
+      },
+      "widgets_values": []
+    }
+  ],
+  "links": [],
+  "groups": [
+    {
+      "id": 4,
+      "title": "Outer Group",
+      "bounding": [
+        -46.25245366331014,
+        -150.82497138023245,
+        1034.4034361963616,
+        1007.338460439933
+      ],
+      "color": "#3f789e",
+      "font_size": 24,
+      "flags": {}
+    },
+    {
+      "id": 3,
+      "title": "Inner Group",
+      "bounding": [
+        80.96059074101554,
+        28.123757436778178,
+        718.286373661183,
+        691.2397164539732
+      ],
+      "color": "#3f789e",
+      "font_size": 24,
+      "flags": {}
+    }
+  ],
+  "config": {},
+  "extra": {
+    "ds": {
+      "scale": 0.7121393732101533,
+      "offset": [
+        289.18242848011835,
+        367.0747755524199
+      ]
+    },
+    "frontendVersion": "1.35.5",
+    "VHS_latentpreview": false,
+    "VHS_latentpreviewrate": 0,
+    "VHS_MetadataImage": true,
+    "VHS_KeepIntermediate": true,
+    "workflowRendererVersion": "Vue"
+  },
+  "version": 0.4
+}

browser_tests/fixtures/ComfyPage.ts

@@ -1634,6 +1634,55 @@ export class ComfyPage {
     }, focusMode)
     await this.nextFrame()
   }
+
+  /**
+   * Get the position of a group by title.
+   * @param title The title of the group to find
+   * @returns The group's canvas position
+   * @throws Error if group not found
+   */
+  async getGroupPosition(title: string): Promise<Position> {
+    const pos = await this.page.evaluate((title) => {
+      const groups = window['app'].graph.groups
+      const group = groups.find((g: { title: string }) => g.title === title)
+      if (!group) return null
+      return { x: group.pos[0], y: group.pos[1] }
+    }, title)
+    if (!pos) throw new Error(`Group "${title}" not found`)
+    return pos
+  }
+
+  /**
+   * Drag a group by its title.
+   * @param options.name The title of the group to drag
+   * @param options.deltaX Horizontal drag distance in screen pixels
+   * @param options.deltaY Vertical drag distance in screen pixels
+   */
+  async dragGroup(options: {
+    name: string
+    deltaX: number
+    deltaY: number
+  }): Promise<void> {
+    const { name, deltaX, deltaY } = options
+    const screenPos = await this.page.evaluate((title) => {
+      const app = window['app']
+      const groups = app.graph.groups
+      const group = groups.find((g: { title: string }) => g.title === title)
+      if (!group) return null
+      // Position in the title area of the group
+      const clientPos = app.canvasPosToClientPos([
+        group.pos[0] + 50,
+        group.pos[1] + 15
+      ])
+      return { x: clientPos[0], y: clientPos[1] }
+    }, name)
+    if (!screenPos) throw new Error(`Group "${name}" not found`)
+
+    await this.dragAndDrop(screenPos, {
+      x: screenPos.x + deltaX,
+      y: screenPos.y + deltaY
+    })
+  }
 }
 
 export const testComfySnapToGridGridSize = 50

browser_tests/tests/vueNodes/groups/groups.spec.ts

@@ -32,4 +32,42 @@ test.describe('Vue Node Groups', () => {
       'vue-groups-fit-to-contents.png'
     )
   })
+
+  test('should move nested groups together when dragging outer group', async ({
+    comfyPage
+  }) => {
+    await comfyPage.loadWorkflow('groups/nested-groups-1-inner-node')
+
+    // Get initial positions with null guards
+    const outerInitial = await comfyPage.getGroupPosition('Outer Group')
+    const innerInitial = await comfyPage.getGroupPosition('Inner Group')
+
+    const initialOffsetX = innerInitial.x - outerInitial.x
+    const initialOffsetY = innerInitial.y - outerInitial.y
+
+    // Drag the outer group
+    const dragDelta = { x: 100, y: 80 }
+    await comfyPage.dragGroup({
+      name: 'Outer Group',
+      deltaX: dragDelta.x,
+      deltaY: dragDelta.y
+    })
+
+    // Use retrying assertion to wait for positions to update
+    await expect(async () => {
+      const outerFinal = await comfyPage.getGroupPosition('Outer Group')
+      const innerFinal = await comfyPage.getGroupPosition('Inner Group')
+
+      const finalOffsetX = innerFinal.x - outerFinal.x
+      const finalOffsetY = innerFinal.y - outerFinal.y
+
+      // Both groups should have moved
+      expect(outerFinal.x).not.toBe(outerInitial.x)
+      expect(innerFinal.x).not.toBe(innerInitial.x)
+
+      // The relative offset should be maintained (inner group moved with outer)
+      expect(finalOffsetX).toBeCloseTo(initialOffsetX, 0)
+      expect(finalOffsetY).toBeCloseTo(initialOffsetY, 0)
+    }).toPass({ timeout: 5000 })
+  })
 })

src/lib/litegraph/src/LGraphCanvas.ts

@@ -8566,9 +8566,11 @@ export class LGraphCanvas
           node,
           newPos: this.calculateNewPosition(node, deltaX, deltaY)
         })
-      } else {
+      } else if (!(child instanceof LGraphGroup)) {
-        // Non-node children (nested groups, reroutes)
+        // Non-node, non-group children (reroutes, etc.)
-        child.move(deltaX, deltaY)
+        // Skip groups here - they're already in allItems and will be
+        // processed in the main loop of moveChildNodesInGroupVueMode
+        child.move(deltaX, deltaY, true)
       }
     }
   }