chore(twenty-front): migrate command-menu, workflow, page-layout and UI modules from Emotion to Linaria (PR 4-6/10) (#18342)

## Summary

Continues the Emotion → Linaria migration (PR 4-6 from the [migration
plan](docs/emotion-to-linaria-migration-plan.md)). Migrates **311
files** across four module groups:

| Module | Files |
|---|---|
| command-menu | 53 |
| workflow | 84 |
| page-layout | 84 |
| UI (partial - first ~80 files) | ~80 |
| twenty-ui (TEXT_INPUT_STYLE) | 1 |
| misc (hooks, keyboard-shortcut-menu, file-upload) | ~9 |

### Migration patterns applied

- `import styled from '@emotion/styled'` → `import { styled } from
'@linaria/react'`
- `import { useTheme } from '@emotion/react'` → `import { useContext }
from 'react'` + `import { ThemeContext } from 'twenty-ui/theme'`
- `${({ theme }) => theme.X.Y.Z}` → `${themeCssVariables.X.Y.Z}` (static
CSS variables)
- `theme.spacing(N)` → `themeCssVariables.spacing[N]`
- `styled(motion.div)` → `motion.create(StyledBase)` (11 components)
- `styled(Component)<TypeParams>` → wrapper div approach for non-HTML
elements
- Multi-declaration interpolations split into one CSS property per
interpolation
- Interpolation return types fixed (`&&` → ternary `? : ''`)
- `TEXT_INPUT_STYLE` converted from function to static string constant
(backward compatible)
- Emotion `<Global>` replaced with `useEffect` style injection
- Complex runtime-dependent styles use CSS custom properties via
`style={}` prop

### After this PR

- **Remaining files**: ~400 (object-record: ~160, settings: ~200, UI:
~44)
- **No breaking changes**: CSS variables resolve identically to the
previous Emotion theme values

packages/twenty-front/src/modules/command-menu/components/CommandMenuList.tsx

@@ -10,9 +10,10 @@ import { hasUserSelectedCommandState } from '@/command-menu/states/hasUserSelect
 import { SelectableList } from '@/ui/layout/selectable-list/components/SelectableList';
 import { useSetAtomState } from '@/ui/utilities/state/jotai/hooks/useSetAtomState';
 import { ScrollWrapper } from '@/ui/utilities/scroll/components/ScrollWrapper';
-import styled from '@emotion/styled';
+import { styled } from '@linaria/react';
 import { t } from '@lingui/core/macro';
 import { MOBILE_VIEWPORT } from 'twenty-ui/theme';
+import { themeCssVariables } from 'twenty-ui/theme-constants';
 
 export type CommandMenuListProps = {
   commandGroups: ActionGroupConfig[];
@@ -28,10 +29,10 @@ const StyledInnerList = styled.div`
     100dvh - ${COMMAND_MENU_SEARCH_BAR_HEIGHT}px -
       ${COMMAND_MENU_SEARCH_BAR_PADDING * 2}px
   );
-  padding-left: ${({ theme }) => theme.spacing(2)};
-  padding-right: ${({ theme }) => theme.spacing(2)};
-  padding-top: ${({ theme }) => theme.spacing(2)};
-  width: calc(100% - ${({ theme }) => theme.spacing(4)});
+  padding-left: ${themeCssVariables.spacing[2]};
+  padding-right: ${themeCssVariables.spacing[2]};
+  padding-top: ${themeCssVariables.spacing[2]};
+  width: calc(100% - ${themeCssVariables.spacing[4]});
 
   @media (min-width: ${MOBILE_VIEWPORT}px) {
     max-height: calc(
@@ -47,9 +48,9 @@ const StyledCommandMenuList = styled.div`
 
 const StyledEmpty = styled.div`
   align-items: center;
-  color: ${({ theme }) => theme.font.color.light};
+  color: ${themeCssVariables.font.color.light};
   display: flex;
-  font-size: ${({ theme }) => theme.font.size.md};
+  font-size: ${themeCssVariables.font.size.md};
   height: 64px;
   justify-content: center;
   white-space: pre-wrap;