Support "control after generate" in vue (#6985)

Continuation of #6034 with
- Updated synchronization for seed
- Properly truncates the displayed widget value for the button
- Synchronizes control after generate state with litegraph and allows
for serialization

Several issues from original PR have not (yet) been addressed, but are
likely better moved to future PR
- fix step value being 10 (legacy system)
- ensure it works with COMBO (Fixed in #7095)
- ensure it works with FLOAT (Fixed in #7095)
- either implement or remove the config button functionality - think it
should open settings?

<img width="280" height="694" alt="image"
src="https://github.com/user-attachments/assets/f36f1cb0-237d-4bfc-bff1-e4976775cf98"
/>

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6985-Support-control-after-generate-in-vue-2b86d73d365081d8b01ce489d887ff00)
by [Unito](https://www.unito.io)

---------

Co-authored-by: bymyself <cbyrne@comfy.org>
Co-authored-by: github-actions <github-actions@github.com>

src/scripts/app.ts

@@ -31,6 +31,7 @@ import {
   type NodeId,
   isSubgraphDefinition
 } from '@/platform/workflow/validation/schemas/workflowSchema'
+import { executeNumberControls } from '@/renderer/extensions/vueNodes/widgets/services/NumberControlRegistry'
 import type {
   ExecutionErrorWsMessage,
   NodeError,
@@ -1358,6 +1359,7 @@ export class ComfyApp {
           forEachNode(this.rootGraph, (node) => {
             for (const widget of node.widgets ?? []) widget.beforeQueued?.()
           })
+          executeNumberControls('before')
 
           const p = await this.graphToPrompt(this.rootGraph)
           const queuedNodes = collectAllNodes(this.rootGraph)
@@ -1402,6 +1404,7 @@ export class ComfyApp {
           // Allow widgets to run callbacks after a prompt has been queued
           // e.g. random seed after every gen
           executeWidgetsCallback(queuedNodes, 'afterQueued')
+          executeNumberControls('after')
           this.canvas.draw(true, true)
           await this.ui.queue.update()
         }