fix(tests): add noCompactor mock + fix note-widget event simulation

- dashboard-grid.test: add noCompactor to react-grid-layout mock
- note-widget.test: enable edit mode before typing (onChange is undefined
  when isEditing=false), replace native dispatchEvent with fireEvent.change

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/web/src/components/dashboard/dashboard-grid.test.tsx

@@ -41,6 +41,7 @@ vi.mock('react-grid-layout', () => ({
   }: {
     children: React.ReactNode;
   }) => <div data-testid="responsive-grid">{children}</div>,
+  noCompactor: () => null,
 }));
 
 // Mock dashboard-api

apps/web/src/components/dashboard/widgets/note-widget.test.tsx

@@ -1,4 +1,4 @@
-import { act, render, screen } from '@testing-library/react';
+import { act, fireEvent, render, screen } from '@testing-library/react';
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
 
 // Mock next-intl
@@ -80,32 +80,15 @@ describe('NoteWidget', () => {
       <NoteWidget instanceId="note-1" config={{}} isEditMode={false} />,
     );
 
-    const editor = screen.getByTestId('md-editor');
-
-    // Type into editor
+    // Enable edit mode so onChange is wired up
     await act(async () => {
-      editor.dispatchEvent(
-        new Event('change', { bubbles: true }),
-      );
-      // Simulate onChange via the mock
-      const event = new Event('input', { bubbles: true });
-      Object.defineProperty(event, 'target', { value: { value: '# Hello' } });
-      // Use fireEvent approach
+      fireEvent.click(screen.getByRole('button'));
     });
 
-    // Directly trigger onChange via the textarea
-    await act(async () => {
-      const textarea = screen.getByTestId('md-editor') as HTMLTextAreaElement;
-      // Change value triggers onChange in our mock
-      Object.getOwnPropertyDescriptor(
-        HTMLTextAreaElement.prototype,
-        'value',
-      )?.set?.call(textarea, '# Hello');
-      textarea.dispatchEvent(new Event('input', { bubbles: true }));
-      textarea.dispatchEvent(new Event('change', { bubbles: true }));
-    });
+    const textarea = screen.getByTestId('md-editor') as HTMLTextAreaElement;
 
     // Before debounce fires, fetch should NOT have been called
+    fireEvent.change(textarea, { target: { value: '# Hello' } });
     expect(fetchSpy).not.toHaveBeenCalled();
 
     // Advance past debounce window
@@ -126,18 +109,16 @@ describe('NoteWidget', () => {
       <NoteWidget instanceId="note-1" config={{}} isEditMode={false} />,
     );
 
+    // Enable edit mode so onChange is wired up
+    await act(async () => {
+      fireEvent.click(screen.getByRole('button'));
+    });
+
     const textarea = screen.getByTestId('md-editor') as HTMLTextAreaElement;
 
     // Simulate rapid typing — three changes in quick succession
     for (const char of ['H', 'He', 'Hel']) {
-      await act(async () => {
-        Object.getOwnPropertyDescriptor(
-          HTMLTextAreaElement.prototype,
-          'value',
-        )?.set?.call(textarea, char);
-        textarea.dispatchEvent(new Event('change', { bubbles: true }));
-      });
-      // Small delay between keystrokes (less than debounce)
+      fireEvent.change(textarea, { target: { value: char } });
       await act(async () => {
         vi.advanceTimersByTime(200);
       });
@@ -162,17 +143,15 @@ describe('NoteWidget', () => {
       <NoteWidget instanceId="note-1" config={{}} isEditMode={false} />,
     );
 
+    // Enable edit mode so onChange is wired up
+    await act(async () => {
+      fireEvent.click(screen.getByRole('button'));
+    });
+
     const textarea = screen.getByTestId('md-editor') as HTMLTextAreaElement;
 
     // First change -> debounce -> save starts
-    await act(async () => {
-      Object.getOwnPropertyDescriptor(
-        HTMLTextAreaElement.prototype,
-        'value',
-      )?.set?.call(textarea, 'first');
-      textarea.dispatchEvent(new Event('change', { bubbles: true }));
-    });
-
+    fireEvent.change(textarea, { target: { value: 'first' } });
     await act(async () => {
       vi.advanceTimersByTime(1500);
     });
@@ -181,14 +160,7 @@ describe('NoteWidget', () => {
     expect(fetchSpy).toHaveBeenCalledTimes(1);
 
     // Second change -> debounce -> should abort the first
-    await act(async () => {
-      Object.getOwnPropertyDescriptor(
-        HTMLTextAreaElement.prototype,
-        'value',
-      )?.set?.call(textarea, 'second');
-      textarea.dispatchEvent(new Event('change', { bubbles: true }));
-    });
-
+    fireEvent.change(textarea, { target: { value: 'second' } });
     await act(async () => {
       vi.advanceTimersByTime(1500);
     });