feat(contextMenu): add extension API for context menu items

Introduces a new extension API that allows extensions to provide context menu items directly, without monkey-patching. This provides a clean, type-safe way for extensions to add menu items.

**New API methods:**
- `getCanvasMenuItems(canvas)`: Add items to canvas right-click menus
- `getNodeMenuItems(node)`: Add items to node right-click menus

**Implementation:**
- Added TypeScript interfaces in `src/types/comfy.ts`
- Added collection methods in `ComfyApp` class
- Comprehensive test coverage for the new API

tests-ui/tests/extensions/contextMenuExtensionName.test.ts

@@ -0,0 +1,65 @@
+import { describe, expect, it, vi } from 'vitest'
+
+import { legacyMenuCompat } from '@/lib/litegraph/src/contextMenuCompat'
+import { LGraphCanvas } from '@/lib/litegraph/src/litegraph'
+
+/**
+ * Test that demonstrates the extension name appearing in deprecation warnings
+ */
+describe('Context Menu Extension Name in Warnings', () => {
+  it('should include extension name in deprecation warning', () => {
+    const warnSpy = vi.spyOn(console, 'warn').mockImplementation(() => {})
+
+    // Install compatibility layer
+    legacyMenuCompat.install(LGraphCanvas.prototype, 'getCanvasMenuOptions')
+
+    // Simulate what happens during extension setup
+    legacyMenuCompat.setCurrentExtension('MyCustomExtension')
+
+    // Extension monkey-patches the method
+    const original = LGraphCanvas.prototype.getCanvasMenuOptions
+    LGraphCanvas.prototype.getCanvasMenuOptions = function (...args: any[]) {
+      const items = (original as any).apply(this, args)
+      items.push({ content: 'My Custom Menu Item', callback: () => {} })
+      return items
+    }
+
+    // Clear extension (happens after setup completes)
+    legacyMenuCompat.setCurrentExtension(null)
+
+    // Verify the warning includes the extension name
+    expect(warnSpy).toHaveBeenCalled()
+    const warningMessage = warnSpy.mock.calls[0][0]
+
+    expect(warningMessage).toContain('[DEPRECATED]')
+    expect(warningMessage).toContain('getCanvasMenuOptions')
+    expect(warningMessage).toContain('"MyCustomExtension"')
+
+    vi.restoreAllMocks()
+  })
+
+  it('should not include extension name if not set', () => {
+    const warnSpy = vi.spyOn(console, 'warn').mockImplementation(() => {})
+
+    // Install compatibility layer
+    legacyMenuCompat.install(LGraphCanvas.prototype, 'getNodeMenuOptions')
+
+    // Extension monkey-patches without setting current extension
+    const original = LGraphCanvas.prototype.getNodeMenuOptions
+    LGraphCanvas.prototype.getNodeMenuOptions = function (...args: any[]) {
+      const items = (original as any).apply(this, args)
+      items.push({ content: 'My Node Menu Item', callback: () => {} })
+      return items
+    }
+
+    // Verify the warning does NOT include extension info
+    expect(warnSpy).toHaveBeenCalled()
+    const warningMessage = warnSpy.mock.calls[0][0]
+
+    expect(warningMessage).toContain('[DEPRECATED]')
+    expect(warningMessage).toContain('getNodeMenuOptions')
+    expect(warningMessage).not.toContain('Extension:')
+
+    vi.restoreAllMocks()
+  })
+})