## Summary
Fixes a bug where the queue/execute button was incorrectly disabled with
a warning icon when creating a new empty workflow, due to stale missing
nodes data persisting from a previous workflow.
## Root Cause
When switching from a workflow with missing nodes to an empty workflow,
the `getWorkflowPacks()` function in `useWorkflowPacks.ts` would return
early without clearing the `workflowPacks.value` ref, causing stale
missing node data to persist.
## Changes
- **`useWorkflowPacks.ts`**: Explicitly clear `workflowPacks.value = []`
when switching to empty workflow
- **`useMissingNodes.test.ts`**: Add test case to verify missing nodes
state clears when switching to empty workflow
## Test Plan
- [x] Added unit test covering the empty workflow scenario
- [x] All 20 unit tests pass
- [x] TypeScript type checking passes
- [x] Manual verification: Create workflow with missing nodes → Create
new empty workflow → Button should be enabled
## Before
1. Open workflow with missing nodes → Button disabled ✅ (correct)
2. Create new empty workflow → Button still disabled ❌ (bug)
3. Click valid workflow → Button enabled ✅
## After
1. Open workflow with missing nodes → Button disabled ✅
2. Create new empty workflow → Button enabled ✅ (fixed)
3. Click valid workflow → Button enabled ✅
[screen-capture
(2).webm](https://github.com/user-attachments/assets/833355d6-6b4b-4e77-94b9-d7964454cfce)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6774-bugfix-Fix-execute-button-incorrectly-disabled-on-empty-workflows-2b16d73d365081e3a050c3f7c0a20cc6)
by [Unito](https://www.unito.io)
## Summary
Reorganized custom nodes manager functionality from scattered technical
layers into a cohesive domain-focused module following [domain-driven
design](https://en.wikipedia.org/wiki/Domain-driven_design) principles.
## Changes
- **What**: Migrated all manager code from technical layers
(`src/components/`, `src/stores/`, etc.) to unified domain structure at
`src/workbench/extensions/manager/`
- **Breaking**: Import paths changed for all manager-related modules
(40+ files updated)
## Review Focus
Verify all import path updates are correct and no circular dependencies
introduced. Check that [Vue 3 composition
API](https://vuejs.org/guide/reusability/composables.html) patterns
remain consistent across relocated composables.
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5662-refactor-Migrate-manager-code-to-DDD-structure-2736d73d3650812c87faf6ed0fffb196)
by [Unito](https://www.unito.io)
- Updated all imports from '@comfyorg/litegraph' to '@/lib/litegraph/src/'
- Replaced deep dist imports with direct source paths
- Updated CSS import in main.ts
- All imports now use the @ alias consistently
