[refactor] Improve renderer domain organization (#5552)

* [refactor] Improve renderer architecture organization

Building on PR #5388, this refines the renderer domain structure:

**Key improvements:**
- Group all transform utilities in `transform/` subdirectory for better cohesion
- Move canvas state to dedicated `renderer/core/canvas/` domain
- Consolidate coordinate system logic (TransformPane, useTransformState, sync utilities)

**File organization:**
- `renderer/core/canvas/canvasStore.ts` (was `stores/graphStore.ts`)
- `renderer/core/layout/transform/` contains all coordinate system utilities
- Transform sync utilities co-located with core transform logic

This creates clearer domain boundaries and groups related functionality
while building on the foundation established in PR #5388.

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

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

* fix: Clean up linter-modified files

* Fix import paths and clean up unused imports after rebase

- Update all remaining @/stores/graphStore references to @/renderer/core/canvas/canvasStore
- Remove unused imports from selection toolbox components
- All tests pass, only reka-ui upstream issue remains in typecheck

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

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

* [auto-fix] Apply ESLint and Prettier fixes

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: GitHub Action <action@github.com>

src/components/graph/selectionToolbox/BypassButton.spec.ts

@@ -7,8 +7,8 @@ import { createI18n } from 'vue-i18n'
 
 import BypassButton from '@/components/graph/selectionToolbox/BypassButton.vue'
 import { LGraphEventMode } from '@/lib/litegraph/src/litegraph'
+import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
 import { useCommandStore } from '@/stores/commandStore'
-import { useCanvasStore } from '@/stores/graphStore'
 
 const mockLGraphNode = {
   type: 'TestNode',

src/components/graph/selectionToolbox/ColorPickerButton.spec.ts

@@ -7,7 +7,7 @@ import { createI18n } from 'vue-i18n'
 
 // Import after mocks
 import ColorPickerButton from '@/components/graph/selectionToolbox/ColorPickerButton.vue'
-import { useCanvasStore } from '@/stores/graphStore'
+import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
 import { useWorkflowStore } from '@/stores/workflowStore'
 
 // Mock the litegraph module

src/components/graph/selectionToolbox/ColorPickerButton.vue

@@ -62,7 +62,7 @@ import {
   LiteGraph,
   isColorable
 } from '@/lib/litegraph/src/litegraph'
-import { useCanvasStore } from '@/stores/graphStore'
+import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
 import { useWorkflowStore } from '@/stores/workflowStore'
 import { useColorPaletteStore } from '@/stores/workspace/colorPaletteStore'
 import { adjustColor } from '@/utils/colorUtil'

src/components/graph/selectionToolbox/ExecuteButton.spec.ts

@@ -6,11 +6,11 @@ import { beforeEach, describe, expect, it, vi } from 'vitest'
 import { createI18n } from 'vue-i18n'
 
 import ExecuteButton from '@/components/graph/selectionToolbox/ExecuteButton.vue'
+import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
 import { useCommandStore } from '@/stores/commandStore'
-import { useCanvasStore } from '@/stores/graphStore'
 
 // Mock the stores
-vi.mock('@/stores/graphStore', () => ({
+vi.mock('@/renderer/core/canvas/canvasStore', () => ({
   useCanvasStore: vi.fn()
 }))
 

src/components/graph/selectionToolbox/ExecuteButton.vue

@@ -21,8 +21,8 @@ import { useI18n } from 'vue-i18n'
 
 import { useSelectionState } from '@/composables/graph/useSelectionState'
 import type { LGraphNode } from '@/lib/litegraph/src/litegraph'
+import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
 import { useCommandStore } from '@/stores/commandStore'
-import { useCanvasStore } from '@/stores/graphStore'
 import { isLGraphNode } from '@/utils/litegraphUtil'
 import { isOutputNode } from '@/utils/nodeFilterUtil'
 

src/components/graph/selectionToolbox/InfoButton.spec.ts

@@ -7,7 +7,7 @@ import { createI18n } from 'vue-i18n'
 
 import InfoButton from '@/components/graph/selectionToolbox/InfoButton.vue'
 // NOTE: The component import must come after mocks so they take effect.
-import { useCanvasStore } from '@/stores/graphStore'
+import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
 import { useNodeDefStore } from '@/stores/nodeDefStore'
 
 const mockLGraphNode = {

src/components/graph/selectionToolbox/SaveToSubgraphLibrary.vue

@@ -21,8 +21,8 @@ import { computed } from 'vue'
 import { useI18n } from 'vue-i18n'
 
 import { SubgraphNode } from '@/lib/litegraph/src/litegraph'
+import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
 import { useCommandStore } from '@/stores/commandStore'
-import { useCanvasStore } from '@/stores/graphStore'
 
 const { t } = useI18n()
 const commandStore = useCommandStore()