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/command-menu/pages/navigation-menu-item/components/CommandMenuEditColorOption.tsx

@@ -15,9 +15,8 @@ import {
   DEFAULT_COLOR_LABELS,
   MenuItemSelectColor,
 } from 'twenty-ui/navigation';
-import { MAIN_COLOR_NAMES, type ThemeColor } from 'twenty-ui/theme';
 import { themeCssVariables } from 'twenty-ui/theme-constants';
-
+import { type ThemeColor, MAIN_COLOR_NAMES } from 'twenty-ui/theme';
 const NAVIGATION_MENU_ITEM_COLOR_DROPDOWN_ID = 'navigation-menu-item-color';
 
 const StyledMenuStyleText = styled.span`

packages/twenty-front/src/modules/command-menu/pages/navigation-menu-item/components/CommandMenuNewSidebarItemMainMenu.tsx

@@ -19,7 +19,7 @@ import { NavigationMenuItemStyleIcon } from '@/navigation-menu-item/components/N
 import { NavigationMenuItemType } from '@/navigation-menu-item/constants/NavigationMenuItemType';
 import { SelectableListItem } from '@/ui/layout/selectable-list/components/SelectableListItem';
 import { useContext } from 'react';
-import { ThemeContext } from 'twenty-ui/theme';
+import { ThemeContext } from 'twenty-ui/theme-constants';
 
 type CommandMenuNewSidebarItemMainMenuProps = {
   onSelectObject: () => void;
@@ -32,8 +32,8 @@ export const CommandMenuNewSidebarItemMainMenu = ({
   onSelectView,
   onSelectRecord,
 }: CommandMenuNewSidebarItemMainMenuProps) => {
-  const { t } = useLingui();
   const { theme } = useContext(ThemeContext);
+  const { t } = useLingui();
   const { handleAddFolder } = useAddFolderToNavigationMenu();
   const { handleAddLink } = useAddLinkToNavigationMenu();
 

packages/twenty-front/src/modules/command-menu/pages/page-layout/components/dropdown-content/ChartColorGradientOption.tsx

@@ -5,9 +5,8 @@ import { SelectableListItem } from '@/ui/layout/selectable-list/components/Selec
 import { styled } from '@linaria/react';
 import { ColorSample } from 'twenty-ui/display';
 import { MenuItemSelect } from 'twenty-ui/navigation';
-import { type ThemeColor } from 'twenty-ui/theme';
 import { themeCssVariables } from 'twenty-ui/theme-constants';
-
+import { type ThemeColor } from 'twenty-ui/theme';
 type ChartColorGradientOptionProps = {
   colorOption: {
     id: string;

packages/twenty-front/src/modules/command-menu/pages/page-layout/components/dropdown-content/ChartColorPaletteOption.tsx

@@ -6,10 +6,9 @@ import { styled } from '@linaria/react';
 import { t } from '@lingui/core/macro';
 import { ColorSample } from 'twenty-ui/display';
 import { MenuItemSelect } from 'twenty-ui/navigation';
-import { type ThemeColor } from 'twenty-ui/theme';
 import { getMainColorNameFromPaletteColorName } from 'twenty-ui/utilities';
 import { themeCssVariables } from 'twenty-ui/theme-constants';
-
+import { type ThemeColor } from 'twenty-ui/theme';
 type ChartColorPaletteOptionProps = {
   selectedItemId: string | null;
   currentColor: string | null | undefined;

packages/twenty-front/src/modules/command-menu/pages/page-layout/components/dropdown-content/ChartColorSelectionDropdownContent.tsx

@@ -17,7 +17,7 @@ import { useAtomComponentStateValue } from '@/ui/utilities/state/jotai/hooks/use
 import { t } from '@lingui/core/macro';
 import { useState } from 'react';
 import { capitalize, isDefined } from 'twenty-shared/utils';
-import { MAIN_COLOR_NAMES, type ThemeColor } from 'twenty-ui/theme';
+import { type ThemeColor, MAIN_COLOR_NAMES } from 'twenty-ui/theme';
 import { filterBySearchQuery } from '~/utils/filterBySearchQuery';
 
 type ColorOption = {

packages/twenty-front/src/modules/command-menu/pages/rich-text-page/components/CommandMenuEditRichTextPage.tsx

@@ -5,8 +5,7 @@ import { styled } from '@linaria/react';
 import { lazy, Suspense, useContext } from 'react';
 import Skeleton, { SkeletonTheme } from 'react-loading-skeleton';
 import { CoreObjectNameSingular } from 'twenty-shared/types';
-import { ThemeContext } from 'twenty-ui/theme';
-import { themeCssVariables } from 'twenty-ui/theme-constants';
+import { ThemeContext, themeCssVariables } from 'twenty-ui/theme-constants';
 
 const ActivityRichTextEditor = lazy(() =>
   import('@/activities/components/ActivityRichTextEditor').then((module) => ({
@@ -23,7 +22,6 @@ const StyledContainer = styled.div`
 
 const LoadingSkeleton = () => {
   const { theme } = useContext(ThemeContext);
-
   return (
     <SkeletonTheme
       baseColor={theme.background.tertiary}

packages/twenty-front/src/modules/command-menu/pages/workflow/trigger-type/components/CommandMenuWorkflowSelectTriggerTypeContent.tsx

@@ -18,11 +18,12 @@ import { t } from '@lingui/core/macro';
 import { isDefined } from 'twenty-shared/utils';
 import { TRIGGER_STEP_ID } from 'twenty-shared/workflow';
 import { useIcons } from 'twenty-ui/display';
-import { MenuItem } from 'twenty-ui/navigation';
 import { useContext } from 'react';
-import { ThemeContext } from 'twenty-ui/theme';
+import { MenuItem } from 'twenty-ui/navigation';
+import { ThemeContext } from 'twenty-ui/theme-constants';
 
 export const CommandMenuWorkflowSelectTriggerTypeContent = () => {
+  const { theme } = useContext(ThemeContext);
   const { getIcon } = useIcons();
   const workflowId = useCommandMenuWorkflowIdOrThrow();
   const { updateTrigger } = useUpdateWorkflowVersionTrigger();
@@ -73,8 +74,6 @@ export const CommandMenuWorkflowSelectTriggerTypeContent = () => {
     };
   };
 
-  const { theme } = useContext(ThemeContext);
-
   return (
     <RightDrawerStepListContainer>
       <RightDrawerWorkflowSelectStepTitle>