Misc small fixes

During the meeting today a few things became apparent. This fixes some of them:

• You now see an error message in the UI when useDataForRoute fails
• You can now pass m_request: {exclude: ["*"]} without causing 422
• The dev tools now work with the color mode and you can use them in dark mode
• I disable the registering useRecent calls for now. They cause an infinite loop (#59 (closed)). Until this is fixed, you don't want to turn your computer into a heater while debugging.

src/components/app/ErrorMessage.test.tsx

 import {render, screen} from '@testing-library/react'
-import {vi} from 'vitest'
 
-import * as useRouteError from '../routing/useRouteError'
 import ErrorMessage from './ErrorMessage'
 
 describe('ErrorMessage', () => {
@@ -10,21 +8,20 @@ describe('ErrorMessage', () => {
     ['DoesNotExist', 'Data not available'],
     ['else', 'Unexpected error'],
   ])('renders error for %s', (errorName, errorMessage) => {
-    vi.spyOn(useRouteError, 'default').mockReturnValue({
-      name: errorName,
-      message: 'error message',
-    })
-    render(<ErrorMessage />)
+    render(<ErrorMessage error={{name: errorName, message: 'error message'}} />)
     expect(screen.getByText(errorMessage)).toBeInTheDocument()
   })
 
   it('renders error with stack', () => {
-    vi.spyOn(useRouteError, 'default').mockReturnValue({
-      name: 'Exception',
-      message: 'error message',
-      stack: 'stack',
-    })
-    render(<ErrorMessage />)
+    render(
+      <ErrorMessage
+        error={{
+          name: 'Exception',
+          message: 'error message',
+          stack: 'stack',
+        }}
+      />,
+    )
     expect(screen.getByText('stack')).toBeInTheDocument()
   })
 })