diff --git a/apps/electron/src/renderer/components/CanvasView.test.tsx b/apps/electron/src/renderer/components/CanvasView.test.tsx
new file mode 100644
index 00000000..a797eadf
--- /dev/null
+++ b/apps/electron/src/renderer/components/CanvasView.test.tsx
@@ -0,0 +1,70 @@
+/**
+ * @vitest-environment jsdom
+ */
+
+import { render, screen } from '@testing-library/react'
+import React from 'react'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { CanvasView } from './CanvasView'
+
+const mockUseIdentity = vi.fn()
+const mockUseNode = vi.fn()
+
+vi.mock('@xnetjs/canvas', async () => {
+  const ReactModule = await import('react')
+
+  return {
+    Canvas: ReactModule.forwardRef(function MockCanvas() {
+      return <div data-testid="mock-canvas">canvas</div>
+    }),
+    createNode: vi.fn(() => ({
+      id: 'node-1',
+      type: 'card',
+      position: { x: 0, y: 0, width: 100, height: 100 },
+      properties: {}
+    }))
+  }
+})
+
+vi.mock('@xnetjs/data', () => ({
+  CanvasSchema: {
+    schema: {
+      '@id': 'xnet://schema/canvas'
+    }
+  }
+}))
+
+vi.mock('@xnetjs/react', () => ({
+  useIdentity: (...args: unknown[]) => mockUseIdentity(...args),
+  useNode: (...args: unknown[]) => mockUseNode(...args)
+}))
+
+describe('CanvasView', () => {
+  beforeEach(() => {
+    const nodesMap = {
+      size: 0,
+      observe: vi.fn(),
+      unobserve: vi.fn()
+    }
+
+    mockUseIdentity.mockReturnValue({ did: 'did:key:test' })
+    mockUseNode.mockReturnValue({
+      data: { title: 'Workspace Canvas' },
+      doc: {
+        getMap: vi.fn(() => nodesMap)
+      },
+      loading: false,
+      awareness: null
+    })
+  })
+
+  it('keeps the canvas host at full height for the renderer shell', () => {
+    render(<CanvasView docId="canvas-1" />)
+
+    const canvas = screen.getByTestId('mock-canvas')
+    const canvasHost = canvas.parentElement?.parentElement
+
+    expect(canvasHost).not.toBeNull()
+    expect(canvasHost?.className).toContain('h-full')
+  })
+})
diff --git a/apps/electron/src/renderer/components/CanvasView.tsx b/apps/electron/src/renderer/components/CanvasView.tsx
index ea2a0fe0..b086aa63 100644
--- a/apps/electron/src/renderer/components/CanvasView.tsx
+++ b/apps/electron/src/renderer/components/CanvasView.tsx
@@ -227,7 +227,7 @@ export const CanvasView = forwardRef<CanvasViewHandle, CanvasViewProps>(function
   }
 
   return (
-    <div className="relative flex-1 overflow-hidden">
+    <div className="relative h-full overflow-hidden">
       <div className="pointer-events-none absolute left-6 top-6 z-20 rounded-full border border-border/60 bg-background/80 px-4 py-2 text-xs uppercase tracking-[0.24em] text-muted-foreground shadow-lg backdrop-blur-xl">
         {canvas?.title || 'Workspace Canvas'}
       </div>
diff --git a/packages/ui/src/primitives/Menu.tsx b/packages/ui/src/primitives/Menu.tsx
index e68bdf73..fd24578a 100644
--- a/packages/ui/src/primitives/Menu.tsx
+++ b/packages/ui/src/primitives/Menu.tsx
@@ -115,11 +115,7 @@ export function MenuSeparator() {
  * A label for use with the simple Menu component.
  */
 export function MenuLabel({ children }: { children: React.ReactNode }) {
-  return (
-    <BaseMenu.GroupLabel className="px-2 py-1.5 text-xs font-semibold text-foreground-muted">
-      {children}
-    </BaseMenu.GroupLabel>
-  )
+  return <div className="px-2 py-1.5 text-xs font-semibold text-foreground-muted">{children}</div>
 }
 
 // ─── Compound Components (for advanced usage) ───────────────────────