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/ai/components/AIChatAssistantMessageRenderer.tsx

@@ -7,11 +7,10 @@ import { LazyMarkdownRenderer } from '@/ai/components/LazyMarkdownRenderer';
 import { ToolStepRenderer } from '@/ai/components/ToolStepRenderer';
 import { groupContiguousThinkingStepParts } from '@/ai/utils/groupContiguousThinkingStepParts';
 import { styled } from '@linaria/react';
-import { useContext } from 'react';
 import { isToolUIPart, type ToolUIPart } from 'ai';
 import { type ExtendedUIMessagePart } from 'twenty-shared/ai';
-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';
 
 const StyledMessagePartsContainer = styled.div`
   display: flex;

packages/twenty-front/src/modules/ai/components/AIChatErrorMessage.tsx

@@ -4,11 +4,10 @@ import { dispatchBrowserEvent } from '@/browser-event/utils/dispatchBrowserEvent
 import { useAtomStateValue } from '@/ui/utilities/state/jotai/hooks/useAtomStateValue';
 import { styled } from '@linaria/react';
 import { t } from '@lingui/core/macro';
-import { useContext } from 'react';
 import { IconAlertCircle, IconRefresh } from 'twenty-ui/display';
 import { Button } 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';
 
 const StyledErrorContainer = styled.div`
   align-items: center;

packages/twenty-front/src/modules/ai/components/AIChatThreadGroup.tsx

@@ -1,10 +1,9 @@
 import { useAIChatThreadClick } from '@/ai/hooks/useAIChatThreadClick';
 import { styled } from '@linaria/react';
-import { useContext } from 'react';
 import { useLingui } from '@lingui/react/macro';
+import { useContext } from 'react';
 import { IconSparkles } 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 AgentChatThread } from '~/generated-metadata/graphql';
 
 const StyledThreadsList = styled.div`
@@ -73,8 +72,8 @@ export const AIChatThreadGroup = ({
   threads: AgentChatThread[];
   title: string;
 }) => {
-  const { t } = useLingui();
   const { theme } = useContext(ThemeContext);
+  const { t } = useLingui();
   const { handleThreadClick } = useAIChatThreadClick();
 
   if (threads.length === 0) {

packages/twenty-front/src/modules/ai/components/CodeExecutionDisplay.tsx

@@ -15,8 +15,7 @@ import {
 } from 'twenty-ui/display';
 import { CodeEditor, LightIconButton } from 'twenty-ui/input';
 import { AnimatedExpandableContainer } from 'twenty-ui/layout';
-import { ThemeContext } from 'twenty-ui/theme';
-import { themeCssVariables } from 'twenty-ui/theme-constants';
+import { ThemeContext, themeCssVariables } from 'twenty-ui/theme-constants';
 import { useCopyToClipboard } from '~/hooks/useCopyToClipboard';
 
 const StyledContainer = styled.div`
@@ -202,8 +201,8 @@ export const CodeExecutionDisplay = ({
   files = [],
   isRunning = false,
 }: CodeExecutionDisplayProps) => {
-  const { t } = useLingui();
   const { theme } = useContext(ThemeContext);
+  const { t } = useLingui();
   const { copyToClipboard } = useCopyToClipboard();
   const [isCodeExpanded, setIsCodeExpanded] = useState(false);
   const [isOutputExpanded, setIsOutputExpanded] = useState(true);

packages/twenty-front/src/modules/ai/components/LazyMarkdownRenderer.tsx

@@ -13,7 +13,7 @@ import {
 import { lazy, Suspense, useContext } from 'react';
 import Skeleton, { SkeletonTheme } from 'react-loading-skeleton';
 import { isDefined } from 'twenty-shared/utils';
-import { ThemeContext } from 'twenty-ui/theme';
+import { ThemeContext } from 'twenty-ui/theme-constants';
 
 const TextWithRecordLinks = ({ text }: { text: string }) => {
   const parts: React.ReactNode[] = [];
@@ -132,7 +132,6 @@ const MarkdownRenderer = lazy(async () => {
 
 const LoadingSkeleton = () => {
   const { theme } = useContext(ThemeContext);
-
   return (
     <SkeletonTheme
       baseColor={theme.background.tertiary}

packages/twenty-front/src/modules/ai/components/ReasoningSummaryDisplay.tsx

@@ -3,8 +3,7 @@ import { useContext, useState } from 'react';
 
 import { IconBrain, IconChevronDown, IconChevronUp } from 'twenty-ui/display';
 import { AnimatedExpandableContainer } from 'twenty-ui/layout';
-import { ThemeContext } from 'twenty-ui/theme';
-import { themeCssVariables } from 'twenty-ui/theme-constants';
+import { ThemeContext, themeCssVariables } from 'twenty-ui/theme-constants';
 
 import { ShimmeringText } from '@/ai/components/ShimmeringText';
 import { t } from '@lingui/core/macro';

packages/twenty-front/src/modules/ai/components/RoutingDebugDisplay.tsx

@@ -4,8 +4,7 @@ import { useContext, useState } from 'react';
 import { IconChevronDown, IconChevronUp } from 'twenty-ui/display';
 import { JsonTree } from 'twenty-ui/json-visualizer';
 import { AnimatedExpandableContainer } from 'twenty-ui/layout';
-import { ThemeContext } from 'twenty-ui/theme';
-import { themeCssVariables } from 'twenty-ui/theme-constants';
+import { ThemeContext, themeCssVariables } from 'twenty-ui/theme-constants';
 
 import { useLingui } from '@lingui/react/macro';
 import { type DataMessagePart } from 'twenty-shared/ai';
@@ -323,8 +322,8 @@ type RoutingDebugDisplayProps = {
 };
 
 export const RoutingDebugDisplay = ({ debug }: RoutingDebugDisplayProps) => {
-  const { t } = useLingui();
   const { theme } = useContext(ThemeContext);
+  const { t } = useLingui();
   const { copyToClipboard } = useCopyToClipboard();
   const [isExpanded, setIsExpanded] = useState(false);
   const [activeTab, setActiveTab] = useState<TabType>('timing');

packages/twenty-front/src/modules/ai/components/RoutingStatusDisplay.tsx

@@ -5,8 +5,7 @@ import { useContext, useState } from 'react';
 import { type DataMessagePart } from 'twenty-shared/ai';
 import { IconChevronDown, IconChevronUp, IconCpu } from 'twenty-ui/display';
 import { AnimatedExpandableContainer } from 'twenty-ui/layout';
-import { ThemeContext } from 'twenty-ui/theme';
-import { themeCssVariables } from 'twenty-ui/theme-constants';
+import { ThemeContext, themeCssVariables } from 'twenty-ui/theme-constants';
 
 const StyledContainer = styled.div`
   display: flex;

packages/twenty-front/src/modules/ai/components/ToolStepRenderer.tsx

@@ -4,8 +4,7 @@ import { useContext, useState } from 'react';
 import { IconChevronDown, IconChevronUp } from 'twenty-ui/display';
 import { JsonTree } from 'twenty-ui/json-visualizer';
 import { AnimatedExpandableContainer } from 'twenty-ui/layout';
-import { ThemeContext } from 'twenty-ui/theme';
-import { themeCssVariables } from 'twenty-ui/theme-constants';
+import { ThemeContext, themeCssVariables } from 'twenty-ui/theme-constants';
 
 import { CodeExecutionDisplay } from '@/ai/components/CodeExecutionDisplay';
 import { ShimmeringText } from '@/ai/components/ShimmeringText';
@@ -137,8 +136,8 @@ export const ToolStepRenderer = ({
   toolPart: ToolUIPart;
   isStreaming: boolean;
 }) => {
-  const { t } = useLingui();
   const { theme } = useContext(ThemeContext);
+  const { t } = useLingui();
   const { copyToClipboard } = useCopyToClipboard();
   const [isExpanded, setIsExpanded] = useState(false);
   const [activeTab, setActiveTab] = useState<TabType>('output');

packages/twenty-front/src/modules/ai/components/__tests__/AIChatAssistantMessageRenderer.test.tsx

@@ -1,5 +1,5 @@
 import { render, screen } from '@testing-library/react';
-import { THEME_LIGHT, ThemeContextProvider } from 'twenty-ui/theme';
+import { ThemeProvider } from 'twenty-ui/theme-constants';
 import { type ExtendedUIMessagePart } from 'twenty-shared/ai';
 
 import { AIChatAssistantMessageRenderer } from '@/ai/components/AIChatAssistantMessageRenderer';
@@ -42,12 +42,12 @@ jest.mock('@/ai/components/CodeExecutionDisplay', () => ({
 
 const renderAssistantRenderer = (messageParts: ExtendedUIMessagePart[]) => {
   return render(
-    <ThemeContextProvider theme={THEME_LIGHT}>
+    <ThemeProvider colorScheme="light">
       <AIChatAssistantMessageRenderer
         messageParts={messageParts}
         isLastMessageStreaming={false}
       />
-    </ThemeContextProvider>,
+    </ThemeProvider>,
   );
 };
 

packages/twenty-front/src/modules/ai/components/__tests__/ThinkingStepsDisplay.test.tsx

@@ -1,6 +1,6 @@
 import { render, screen, waitFor } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
-import { THEME_LIGHT, ThemeContextProvider } from 'twenty-ui/theme';
+import { ThemeProvider } from 'twenty-ui/theme-constants';
 
 import { ThinkingStepsDisplay } from '@/ai/components/ThinkingStepsDisplay';
 import { type ThinkingStepPart } from '@/ai/utils/thinkingStepPart';
@@ -80,13 +80,13 @@ const renderThinkingStepsDisplay = ({
   hasAssistantTextResponseStarted?: boolean;
 }) => {
   return render(
-    <ThemeContextProvider theme={THEME_LIGHT}>
+    <ThemeProvider colorScheme="light">
       <ThinkingStepsDisplay
         parts={parts}
         isLastMessageStreaming={isLastMessageStreaming}
         hasAssistantTextResponseStarted={hasAssistantTextResponseStarted}
       />
-    </ThemeContextProvider>,
+    </ThemeProvider>,
   );
 };
 

packages/twenty-front/src/modules/ai/components/internal/AIChatContextUsageButton.tsx

@@ -1,11 +1,10 @@
 import { styled } from '@linaria/react';
 import { t } from '@lingui/core/macro';
 import { useLingui } from '@lingui/react/macro';
-import { useContext, useState } from 'react';
+import { useState } from 'react';
 import { isDefined } from 'twenty-shared/utils';
 import { HorizontalSeparator } from 'twenty-ui/display';
 import { ProgressBar } from 'twenty-ui/feedback';
-import { ThemeContext } from 'twenty-ui/theme';
 import { themeCssVariables } from 'twenty-ui/theme-constants';
 
 import { ContextUsageProgressRing } from '@/ai/components/internal/ContextUsageProgressRing';
@@ -116,7 +115,6 @@ const getCachedLabel = (lastMessage: AgentChatLastMessageUsage): string => {
 
 export const AIChatContextUsageButton = () => {
   const { t } = useLingui();
-  const { theme } = useContext(ThemeContext);
   const [isHovered, setIsHovered] = useState(false);
   const agentChatUsage = useAtomStateValue(agentChatUsageState);
 
@@ -175,19 +173,22 @@ export const AIChatContextUsageButton = () => {
               value={percentage}
               barColor={
                 percentage > 80
-                  ? theme.color.red
+                  ? themeCssVariables.color.red
                   : percentage > 60
-                    ? theme.color.orange
-                    : theme.color.blue
+                    ? themeCssVariables.color.orange
+                    : themeCssVariables.color.blue
               }
-              backgroundColor={theme.background.tertiary}
+              backgroundColor={themeCssVariables.background.tertiary}
               withBorderRadius
             />
           </StyledSection>
 
           {isDefined(lastMessage) && (
             <>
-              <HorizontalSeparator noMargin color={theme.background.tertiary} />
+              <HorizontalSeparator
+                noMargin
+                color={themeCssVariables.background.tertiary}
+              />
               <StyledSection>
                 <StyledSectionTitle>{t`Last message`}</StyledSectionTitle>
                 <SettingsBillingLabelValueItem
@@ -206,7 +207,10 @@ export const AIChatContextUsageButton = () => {
             </>
           )}
 
-          <HorizontalSeparator noMargin color={theme.background.tertiary} />
+          <HorizontalSeparator
+            noMargin
+            color={themeCssVariables.background.tertiary}
+          />
           <StyledSection>
             <StyledSectionTitle>{t`Conversation`}</StyledSectionTitle>
             <SettingsBillingLabelValueItem

packages/twenty-front/src/modules/ai/components/internal/AIChatSkeletonLoader.tsx

@@ -5,8 +5,7 @@ import { useAtomStateValue } from '@/ui/utilities/state/jotai/hooks/useAtomState
 import { styled } from '@linaria/react';
 import { useContext } from 'react';
 import Skeleton, { SkeletonTheme } from 'react-loading-skeleton';
-import { ThemeContext } from 'twenty-ui/theme';
-import { themeCssVariables } from 'twenty-ui/theme-constants';
+import { ThemeContext, themeCssVariables } from 'twenty-ui/theme-constants';
 
 const StyledSkeletonContainer = styled.div`
   display: flex;

packages/twenty-front/src/modules/ai/components/internal/AgentChatFilePreview.tsx

@@ -13,7 +13,7 @@ import { isDefined } from 'twenty-shared/utils';
 import { AvatarOrIcon, Chip, ChipVariant } from 'twenty-ui/components';
 import { type IconComponent, IconX } from 'twenty-ui/display';
 import { Loader } from 'twenty-ui/feedback';
-import { ThemeContext } from 'twenty-ui/theme';
+import { ThemeContext } from 'twenty-ui/theme-constants';
 
 const StyledClickableContainer = styled.div<{ clickable: boolean }>`
   cursor: ${({ clickable }: { clickable: boolean }) =>

packages/twenty-front/src/modules/ai/components/internal/ContextUsageProgressRing.tsx

@@ -1,6 +1,4 @@
 import { styled } from '@linaria/react';
-import { useContext } from 'react';
-import { ThemeContext } from 'twenty-ui/theme';
 import { themeCssVariables } from 'twenty-ui/theme-constants';
 
 type ContextUsageProgressRingProps = {
@@ -32,8 +30,6 @@ export const ContextUsageProgressRing = ({
   size = 16,
   strokeWidth = 2,
 }: ContextUsageProgressRingProps) => {
-  const { theme } = useContext(ThemeContext);
-
   const normalizedPercentage = Math.min(Math.max(percentage, 0), 100);
   const radius = (size - strokeWidth) / 2;
   const circumference = 2 * Math.PI * radius;
@@ -42,10 +38,10 @@ export const ContextUsageProgressRing = ({
 
   const progressColor =
     normalizedPercentage > 80
-      ? theme.color.red
+      ? themeCssVariables.color.red
       : normalizedPercentage > 60
-        ? theme.color.orange
-        : theme.color.blue;
+        ? themeCssVariables.color.orange
+        : themeCssVariables.color.blue;
 
   return (
     <StyledSvg width={size} height={size}>
@@ -60,7 +56,7 @@ export const ContextUsageProgressRing = ({
         cy={size / 2}
         r={radius}
         strokeWidth={strokeWidth}
-        stroke={progressColor}
+        style={{ stroke: progressColor }}
         strokeDasharray={circumference}
         strokeDashoffset={strokeDashoffset}
         strokeLinecap="round"