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/ui/field/display/components/UploadFileChip.tsx

@@ -1,24 +1,26 @@
-import { useTheme } from '@emotion/react';
-import styled from '@emotion/styled';
+import { styled } from '@linaria/react';
 import { IconArrowUp } from 'twenty-ui/display';
 import { Loader } from 'twenty-ui/feedback';
+import { themeCssVariables } from 'twenty-ui/theme-constants';
+import { useContext } from 'react';
+import { ThemeContext } from 'twenty-ui/theme';
 
 const StyledContainer = styled.div`
   align-items: center;
-  background-color: ${({ theme }) => theme.background.transparent.light};
-  border-radius: ${({ theme }) => theme.border.radius.sm};
+  background-color: ${themeCssVariables.background.transparent.light};
+  border-radius: ${themeCssVariables.border.radius.sm};
   display: flex;
-  gap: ${({ theme }) => theme.spacing(1)};
-  height: ${({ theme }) => theme.spacing(5)};
-  padding: 0 ${({ theme }) => theme.spacing(1)};
-  margin-right: ${({ theme }) => theme.spacing(1)};
+  gap: ${themeCssVariables.spacing[1]};
+  height: ${themeCssVariables.spacing[5]};
+  padding: 0 ${themeCssVariables.spacing[1]};
+  margin-right: ${themeCssVariables.spacing[1]};
 `;
 
 const StyledIconBox = styled.div`
   align-items: center;
-  background-color: ${({ theme }) => theme.font.color.tertiary};
-  border-radius: ${({ theme }) => theme.border.radius.sm};
-  color: ${({ theme }) => theme.background.primary};
+  background-color: ${themeCssVariables.font.color.tertiary};
+  border-radius: ${themeCssVariables.border.radius.sm};
+  color: ${themeCssVariables.background.primary};
   display: flex;
   height: 14px;
   justify-content: center;
@@ -27,7 +29,7 @@ const StyledIconBox = styled.div`
 
 const StyledStaticLoader = styled.div`
   align-items: center;
-  border: 1px solid ${({ theme }) => theme.font.color.tertiary};
+  border: 1px solid ${themeCssVariables.font.color.tertiary};
   border-radius: 12px;
   box-sizing: border-box;
   display: flex;
@@ -41,7 +43,7 @@ type UploadFileChipProps = {
 };
 
 export const UploadFileChip = ({ isLoading = true }: UploadFileChipProps) => {
-  const theme = useTheme();
+  const { theme } = useContext(ThemeContext);
 
   return (
     <StyledContainer>