Update Litegraph: Canvas Pointer (#1556)

* Litegraph: canvas.pointer

Clear @ts-expect-error

Fix exception thrown on slot double-click

Long-standing bug but has no real impact in prod - just logs an error.
Required for new connecting_link features.

Add settings: CanvasPointer options

Update litegraph 0.8.28

Fix regression in snap to grid render

Fix snap to grid marker always on

Update snap to grid to use Positionable API

Fix test clicks registering as double-click

Improve test precision

Current test proves it has changed to something smaller.
New test proves it is exactly what was specified.
Will need refinement when a limit is put on latent width.

Fix test expects collapse node to select node

Remove redundant code

Resolved by CanvasPointer

Fix flaky test - ContextMenu

Fix settings group

* Update litegraph

* Remove snapToGrid extension

* Update test expectations [skip ci]

---------

Co-authored-by: huchenlei <huchenlei@proton.me>
Co-authored-by: github-actions <github-actions@github.com>

browser_tests/fixtures/ComfyPage.ts

@@ -526,9 +526,6 @@ export class ComfyPage {
     safeSpot = safeSpot || { x: 10, y: 10 }
     await this.page.mouse.move(safeSpot.x, safeSpot.y)
     await this.page.mouse.down()
-    // TEMPORARY HACK: Multiple pans open the search menu, so cheat and keep it closed.
-    // TODO: Fix that (double-click at not-the-same-coordinations should not open the menu)
-    await this.page.keyboard.press('Escape')
     await this.page.mouse.move(offset.x + safeSpot.x, offset.y + safeSpot.y)
     await this.page.mouse.up()
     await this.nextFrame()
@@ -557,6 +554,11 @@ export class ComfyPage {
     await this.nextFrame()
   }
 
+  async clickContextMenuItem(name: string): Promise<void> {
+    await this.page.getByRole('menuitem', { name }).click()
+    await this.nextFrame()
+  }
+
   async doubleClickCanvas() {
     await this.page.mouse.dblclick(10, 10, { delay: 5 })
     await this.nextFrame()