Deprecate runtime theme objects in favor of CSS variables (#18402)

## Summary

- **Eliminate `ICON_SIZES` / `ICON_STROKES` constants**: all icon
dimensions are now resolved at runtime via
`resolveThemeVariableAsNumber(themeCssVariables.icon.size.X)`, ensuring
values always come from computed CSS variables
- **No more consumer imports from `twenty-ui/theme`**: moved
`ColorSchemeContext`, `ColorSchemeProvider`, `ThemeColor`,
`MAIN_COLOR_NAMES`, `getNextThemeColor`, `AnimationDuration` to
`twenty-ui/theme-constants`
- **Remove `ThemeContext` / `ThemeContextProvider` / `ThemeProvider` /
`ThemeType`**: replaced across ~300 files with `themeCssVariables` (for
CSS contexts) or `resolveThemeVariable` / `resolveThemeVariableAsNumber`
(for JS runtime values)
- **Simplify provider chain**: only `ColorSchemeProvider` remains — it
toggles `light`/`dark` class on `document.documentElement` and provides
`colorScheme` via React context
- **Fix pre-existing test failures**: `useIcons.test.ts`
(non-configurable ES module spy) and
`turnRecordFilterGroupIntoGqlOperationFilter.test.ts`
(`Omit<RecordFilter, 'id'>` type mismatch)

### Theme access pattern (before → after)

| Context | Before | After |
|---------|--------|-------|
| CSS (Linaria) | `${({ theme }) => theme.font.color.primary}` |
`${themeCssVariables.font.color.primary}` |
| JS runtime (icon size, animation) | `theme.icon.size.md` /
`ICON_SIZES.md` |
`resolveThemeVariableAsNumber(themeCssVariables.icon.size.md)` |
| Color scheme check | `theme.name === 'dark'` |
`useContext(ColorSchemeContext).colorScheme === 'dark'` |

packages/twenty-front/src/modules/auth/sign-in-up/components/SignInUpGlobalScopeForm.tsx

@@ -30,8 +30,7 @@ import {
   IconChevronRight,
   IconPlus,
 } from 'twenty-ui/display';
-import { ThemeContext } from 'twenty-ui/theme';
-import { themeCssVariables } from 'twenty-ui/theme-constants';
+import { ThemeContext, themeCssVariables } from 'twenty-ui/theme-constants';
 import { type AvailableWorkspace } from '~/generated-metadata/graphql';
 import { getWorkspaceUrl } from '~/utils/getWorkspaceUrl';
 
@@ -135,11 +134,11 @@ const StyledForgotPasswordLinkContainer = styled.div`
 `;
 
 export const SignInUpGlobalScopeForm = () => {
+  const { theme } = useContext(ThemeContext);
   const authProviders = useAtomStateValue(authProvidersState);
   const signInUpStep = useAtomStateValue(signInUpStepState);
   const { buildWorkspaceUrl } = useBuildWorkspaceUrl();
   const { signOut } = useAuth();
-  const { theme } = useContext(ThemeContext);
 
   const { createWorkspace } = useSignUpInNewWorkspace();
   const availableWorkspaces = useAtomStateValue(availableWorkspacesState);

packages/twenty-front/src/modules/auth/sign-in-up/components/__tests__/SignInUpGlobalScopeForm.test.tsx

@@ -3,11 +3,7 @@ import { I18nProvider } from '@lingui/react';
 import { fireEvent, render, screen } from '@testing-library/react';
 import { Provider as JotaiProvider } from 'jotai';
 import { SOURCE_LOCALE } from 'twenty-shared/translations';
-import {
-  THEME_LIGHT,
-  ThemeContextProvider,
-  ThemeProvider,
-} from 'twenty-ui/theme';
+import { ThemeProvider } from 'twenty-ui/theme-constants';
 
 import { SignInUpGlobalScopeForm } from '@/auth/sign-in-up/components/SignInUpGlobalScopeForm';
 import {
@@ -98,12 +94,10 @@ describe('SignInUpGlobalScopeForm', () => {
 
     render(
       <JotaiProvider store={jotaiStore}>
-        <ThemeProvider theme={THEME_LIGHT}>
-          <ThemeContextProvider theme={THEME_LIGHT}>
-            <I18nProvider i18n={i18n}>
-              <SignInUpGlobalScopeForm />
-            </I18nProvider>
-          </ThemeContextProvider>
+        <ThemeProvider colorScheme="light">
+          <I18nProvider i18n={i18n}>
+            <SignInUpGlobalScopeForm />
+          </I18nProvider>
         </ThemeProvider>
       </JotaiProvider>,
     );

packages/twenty-front/src/modules/auth/sign-in-up/components/internal/SignInUpPasswordField.tsx

@@ -7,8 +7,7 @@ import { motion } from 'framer-motion';
 import { useContext } from 'react';
 import { Controller, useFormContext } from 'react-hook-form';
 import { StyledText } from 'twenty-ui/display';
-import { ThemeContext } from 'twenty-ui/theme';
-import { themeCssVariables } from 'twenty-ui/theme-constants';
+import { ThemeContext, themeCssVariables } from 'twenty-ui/theme-constants';
 
 const StyledFullWidthMotionDiv = styled(motion.div)`
   width: 100%;
@@ -25,8 +24,8 @@ export const SignInUpPasswordField = ({
   showErrors: boolean;
   signInUpMode: SignInUpMode;
 }) => {
-  const { t } = useLingui();
   const { theme } = useContext(ThemeContext);
+  const { t } = useLingui();
   const form = useFormContext<Form>();
 
   return (

packages/twenty-front/src/modules/auth/sign-in-up/components/internal/SignInUpTwoFactorAuthenticationProvision.tsx

@@ -7,14 +7,13 @@ import {
 import { extractSecretFromOtpUri } from '@/settings/two-factor-authentication/utils/extractSecretFromOtpUri';
 import { styled } from '@linaria/react';
 import { Trans, useLingui } from '@lingui/react/macro';
-import { useContext } from 'react';
 import QRCode from 'react-qr-code';
 import { useSetAtomState } from '@/ui/utilities/state/jotai/hooks/useSetAtomState';
 import { IconCopy } from 'twenty-ui/display';
 import { Loader } from 'twenty-ui/feedback';
 import { MainButton } from 'twenty-ui/input';
-import { ThemeContext } from 'twenty-ui/theme';
-import { themeCssVariables } from 'twenty-ui/theme-constants';
+import { useContext } from 'react';
+import { ThemeContext, themeCssVariables } from 'twenty-ui/theme-constants';
 import { useAtomStateValue } from '@/ui/utilities/state/jotai/hooks/useAtomStateValue';
 import { useCopyToClipboard } from '~/hooks/useCopyToClipboard';
 
@@ -69,8 +68,8 @@ const StyledCopySetupKeyLink = styled.button`
 `;
 
 export const SignInUpTwoFactorAuthenticationProvision = () => {
-  const { t } = useLingui();
   const { theme } = useContext(ThemeContext);
+  const { t } = useLingui();
   const { copyToClipboard } = useCopyToClipboard();
   const qrCode = useAtomStateValue(qrCodeState);
   const setSignInUpStep = useSetAtomState(signInUpStepState);

packages/twenty-front/src/modules/auth/sign-in-up/components/internal/SignInUpWithGoogle.tsx

@@ -11,12 +11,11 @@ import { useLingui } from '@lingui/react/macro';
 import { memo, useContext } from 'react';
 import { HorizontalSeparator, IconGoogle } from 'twenty-ui/display';
 import { MainButton } from 'twenty-ui/input';
-import { ThemeContext } from 'twenty-ui/theme';
 import { useAtomState } from '@/ui/utilities/state/jotai/hooks/useAtomState';
 import { useAtomStateValue } from '@/ui/utilities/state/jotai/hooks/useAtomStateValue';
 import { LastUsedPill } from './LastUsedPill';
 import { StyledSSOButtonContainer } from './SignInUpSSOButtonStyles';
-
+import { ThemeContext } from 'twenty-ui/theme-constants';
 const GoogleIcon = memo(() => {
   const { theme } = useContext(ThemeContext);
   return <IconGoogle size={theme.icon.size.md} />;

packages/twenty-front/src/modules/auth/sign-in-up/components/internal/SignInUpWithMicrosoft.tsx

@@ -11,11 +11,11 @@ import { useLingui } from '@lingui/react/macro';
 import { useContext } from 'react';
 import { HorizontalSeparator, IconMicrosoft } from 'twenty-ui/display';
 import { MainButton } from 'twenty-ui/input';
-import { ThemeContext } from 'twenty-ui/theme';
 import { useAtomState } from '@/ui/utilities/state/jotai/hooks/useAtomState';
 import { useAtomStateValue } from '@/ui/utilities/state/jotai/hooks/useAtomStateValue';
 import { LastUsedPill } from './LastUsedPill';
 import { StyledSSOButtonContainer } from './SignInUpSSOButtonStyles';
+import { ThemeContext } from 'twenty-ui/theme-constants';
 
 export const SignInUpWithMicrosoft = ({
   action,

packages/twenty-front/src/modules/auth/sign-in-up/components/internal/SignInUpWithSSO.tsx

@@ -11,13 +11,13 @@ import { useAtomStateValue } from '@/ui/utilities/state/jotai/hooks/useAtomState
 import { useAtomState } from '@/ui/utilities/state/jotai/hooks/useAtomState';
 import { useSetAtomState } from '@/ui/utilities/state/jotai/hooks/useSetAtomState';
 import { useLingui } from '@lingui/react/macro';
-import { useContext } from 'react';
 import { isDefined } from 'twenty-shared/utils';
 import { HorizontalSeparator, IconLock } from 'twenty-ui/display';
 import { MainButton } from 'twenty-ui/input';
-import { ThemeContext } from 'twenty-ui/theme';
 import { LastUsedPill } from './LastUsedPill';
 import { StyledSSOButtonContainer } from './SignInUpSSOButtonStyles';
+import { useContext } from 'react';
+import { ThemeContext } from 'twenty-ui/theme-constants';
 
 export const SignInUpWithSSO = () => {
   const { theme } = useContext(ThemeContext);