[refactor] Improve workflow domain organization (#5584)

* [refactor] move workflow domain to its own folder

* [refactor] Fix workflow platform architecture organization

- Move workflow rendering functionality to renderer/thumbnail domain
- Rename ui folder to management for better semantic clarity
- Update all import paths to reflect proper domain boundaries
- Fix test imports to use new structure

Architecture improvements:
- rendering → renderer/thumbnail (belongs with other rendering logic)
- ui → management (better name for state management and UI integration)

This ensures proper separation of concerns and domain boundaries.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* [fix] Resolve circular dependency between nodeDefStore and subgraphStore

* [fix] Update browser test imports to use new workflow platform paths

---------

Co-authored-by: Claude <noreply@anthropic.com>

tests-ui/tests/store/executionStore.test.ts

@@ -1,12 +1,12 @@
 import { createPinia, setActivePinia } from 'pinia'
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 
+import { useWorkflowStore } from '@/platform/workflow/management/stores/workflowStore'
 import { app } from '@/scripts/app'
 import { useExecutionStore } from '@/stores/executionStore'
-import { useWorkflowStore } from '@/stores/workflowStore'
 
 // Mock the workflowStore
-vi.mock('@/stores/workflowStore', () => ({
+vi.mock('@/platform/workflow/management/stores/workflowStore', () => ({
   useWorkflowStore: vi.fn(() => ({
     nodeExecutionIdToNodeLocatorId: vi.fn(),
     nodeIdToNodeLocatorId: vi.fn(),

tests-ui/tests/store/subgraphNavigationStore.test.ts

@@ -2,10 +2,10 @@ import { createPinia, setActivePinia } from 'pinia'
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 import { nextTick } from 'vue'
 
+import { useWorkflowStore } from '@/platform/workflow/management/stores/workflowStore'
+import type { ComfyWorkflow } from '@/platform/workflow/management/stores/workflowStore'
 import { app } from '@/scripts/app'
 import { useSubgraphNavigationStore } from '@/stores/subgraphNavigationStore'
-import { useWorkflowStore } from '@/stores/workflowStore'
-import type { ComfyWorkflow } from '@/stores/workflowStore'
 
 vi.mock('@/scripts/app', () => {
   const mockCanvas = {

tests-ui/tests/store/subgraphNavigationStore.viewport.test.ts

@@ -2,10 +2,10 @@ import { createPinia, setActivePinia } from 'pinia'
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 import { nextTick } from 'vue'
 
+import { useWorkflowStore } from '@/platform/workflow/management/stores/workflowStore'
+import type { ComfyWorkflow } from '@/platform/workflow/management/stores/workflowStore'
 import { app } from '@/scripts/app'
 import { useSubgraphNavigationStore } from '@/stores/subgraphNavigationStore'
-import { useWorkflowStore } from '@/stores/workflowStore'
-import type { ComfyWorkflow } from '@/stores/workflowStore'
 
 vi.mock('@/scripts/app', () => {
   const mockCanvas = {

tests-ui/tests/store/workflowStore.test.ts

@@ -3,15 +3,15 @@ import { beforeEach, describe, expect, it, vi } from 'vitest'
 import { nextTick } from 'vue'
 
 import type { Subgraph } from '@/lib/litegraph/src/litegraph'
-import { api } from '@/scripts/api'
-import { app as comfyApp } from '@/scripts/app'
-import { defaultGraph, defaultGraphJSON } from '@/scripts/defaultGraph'
 import {
   ComfyWorkflow,
   LoadedComfyWorkflow,
   useWorkflowBookmarkStore,
   useWorkflowStore
-} from '@/stores/workflowStore'
+} from '@/platform/workflow/management/stores/workflowStore'
+import { api } from '@/scripts/api'
+import { app as comfyApp } from '@/scripts/app'
+import { defaultGraph, defaultGraphJSON } from '@/scripts/defaultGraph'
 import { isSubgraph } from '@/utils/typeGuardUtil'
 
 // Add mock for api at the top of the file