Migrate from ESLint to OxLint (#18443)

## Summary

Fully replaces ESLint with OxLint across the entire monorepo:

- **Replaced all ESLint configs** (`eslint.config.mjs`) with OxLint
configs (`.oxlintrc.json`) for every package: `twenty-front`,
`twenty-server`, `twenty-emails`, `twenty-ui`, `twenty-shared`,
`twenty-sdk`, `twenty-zapier`, `twenty-docs`, `twenty-website`,
`twenty-apps/*`, `create-twenty-app`
- **Migrated custom lint rules** from ESLint plugin format to OxLint JS
plugin system (`@oxlint/plugins`), including
`styled-components-prefixed-with-styled`, `no-hardcoded-colors`,
`sort-css-properties-alphabetically`,
`graphql-resolvers-should-be-guarded`,
`rest-api-methods-should-be-guarded`, `max-consts-per-file`, and
Jotai-related rules
- **Migrated custom rule tests** from ESLint `RuleTester` + Jest to
`oxlint/plugins-dev` `RuleTester` + Vitest
- **Removed all ESLint dependencies** from `package.json` files and
regenerated lockfiles
- **Updated Nx targets** (`lint`, `lint:diff-with-main`, `fmt`) in
`nx.json` and per-project `project.json` to use `oxlint` commands with
proper `dependsOn` for plugin builds
- **Updated CI workflows** (`.github/workflows/ci-*.yaml`) — no more
ESLint executor
- **Updated IDE setup**: replaced `dbaeumer.vscode-eslint` with
`oxc.oxc-vscode` extension, configured `source.fixAll.oxc` and
format-on-save with Prettier
- **Replaced all `eslint-disable` comments** with `oxlint-disable`
equivalents across the codebase
- **Updated docs** (`twenty-docs`) to reference OxLint instead of ESLint
- **Renamed** `twenty-eslint-rules` package to `twenty-oxlint-rules`

### Temporarily disabled rules (tracked in `OXLINT_MIGRATION_TODO.md`)

| Rule | Package | Violations | Auto-fixable |
|------|---------|-----------|-------------|
| `twenty/sort-css-properties-alphabetically` | twenty-front | 578 | Yes
|
| `typescript/consistent-type-imports` | twenty-server | 3814 | Yes |
| `twenty/max-consts-per-file` | twenty-server | 94 | No |

### Dropped plugins (no OxLint equivalent)

`eslint-plugin-project-structure`, `lingui/*`, `@stylistic/*`,
`import/order`, `prefer-arrow/prefer-arrow-functions`,
`eslint-plugin-mdx`, `@next/eslint-plugin-next`,
`eslint-plugin-storybook`, `eslint-plugin-react-refresh`. Partial
coverage for `jsx-a11y` and `unused-imports`.

### Additional fixes (pre-existing issues exposed by merge)

- Fixed `EmailThreadPreview.tsx` broken import from main rename
(`useOpenEmailThreadInSidePanel`)
- Restored truthiness guard in `getActivityTargetObjectRecords.ts`
- Fixed `AgentTurnResolver` return types to match entity (virtual
`fileMediaType`/`fileUrl` are resolved via `@ResolveField()`)

## Test plan

- [x] `npx nx lint twenty-front` passes
- [x] `npx nx lint twenty-server` passes
- [x] `npx nx lint twenty-docs` passes
- [x] Custom oxlint rules validated with Vitest: `npx nx test
twenty-oxlint-rules`
- [x] `npx nx typecheck twenty-front` passes
- [x] `npx nx typecheck twenty-server` passes
- [x] CI workflows trigger correctly with `dependsOn:
["twenty-oxlint-rules:build"]`
- [x] IDE linting works with `oxc.oxc-vscode` extension

packages/twenty-front/src/modules/settings/components/SettingsCard.tsx

@@ -5,6 +5,7 @@ import { t } from '@lingui/core/macro';
 import { Card, CardContent } from 'twenty-ui/layout';
 import { IconChevronRight } from 'twenty-ui/display';
 import { Pill } from 'twenty-ui/components';
+import { isDefined } from 'twenty-shared/utils';
 import { ThemeContext, themeCssVariables } from 'twenty-ui/theme-constants';
 
 type SettingsCardProps = {
@@ -113,7 +114,7 @@ export const SettingsCard = ({
                 {title}
                 {soon && <Pill label={t`Soon`} />}
               </StyledTitle>
-              {Status && Status}
+              {isDefined(Status) && Status}
               <StyledIconChevronRightContainer>
                 <IconChevronRight size={theme.icon.size.sm} />
               </StyledIconChevronRightContainer>

packages/twenty-front/src/modules/settings/components/SettingsDnsRecordsTable.tsx

@@ -46,7 +46,7 @@ export const SettingsDnsRecordsTable = ({
 }: SettingsDnsRecordsTableProps) => {
   const { copyToClipboard } = useCopyToClipboard();
 
-  if (!records || records.length === 0) {
+  if (records.length === 0) {
     return null;
   }
 

packages/twenty-front/src/modules/settings/components/SettingsMorphRelationMultiSelect.tsx

@@ -153,7 +153,7 @@ export const SettingsMorphRelationMultiSelect = ({
   const { setSelectedItemId } = useSelectableList(dropdownId);
 
   const handleDropdownOpen = () => {
-    if (selectedOptions && selectedOptions.length > 0 && !searchInputValue) {
+    if (selectedOptions.length > 0 && !searchInputValue) {
       setSelectedItemId(selectedOptions[0].label);
     }
   };

packages/twenty-front/src/modules/settings/components/SettingsOptions/SettingsOptionCardContentButton.tsx

@@ -11,6 +11,7 @@ import {
   type IconComponent,
   OverflowingTextWithTooltip,
 } from 'twenty-ui/display';
+import { isDefined } from 'twenty-shared/utils';
 
 type SettingsOptionCardContentButtonProps = {
   Icon?: IconComponent;
@@ -47,7 +48,7 @@ export const SettingsOptionCardContentButton = ({
           </StyledSettingsCardDescription>
         )}
       </StyledSettingsCardTextContainer>
-      {Button && <StyledButtonContainer>{Button}</StyledButtonContainer>}
+      {isDefined(Button) && <StyledButtonContainer>{Button}</StyledButtonContainer>}
     </StyledSettingsCardContent>
   );
 };

packages/twenty-front/src/modules/settings/components/SettingsPageContainer.tsx

@@ -11,6 +11,7 @@ import { themeCssVariables } from 'twenty-ui/theme-constants';
 
 const StyledSettingsPageContainer = styled.div<{
   width?: number;
+  isMobile?: boolean;
 }>`
   display: flex;
   flex-direction: column;
@@ -18,11 +19,11 @@ const StyledSettingsPageContainer = styled.div<{
   overflow: auto;
   padding: ${themeCssVariables.spacing[6]} ${themeCssVariables.spacing[8]}
     ${themeCssVariables.spacing[8]};
-  width: ${({ width }) => {
+  width: ${({ width, isMobile }) => {
     if (isDefined(width)) {
       return width + 'px';
     }
-    if (useIsMobile()) {
+    if (isMobile) {
       return 'unset';
     }
     return OBJECT_SETTINGS_WIDTH + 'px';
@@ -35,6 +36,7 @@ export const SettingsPageContainer = ({
 }: {
   children: ReactNode;
 }) => {
+  const isMobile = useIsMobile();
   const location = useLocation();
   const settingsPath = useMemo(() => {
     const sortedPaths = Object.values(SettingsPath).sort(
@@ -54,7 +56,9 @@ export const SettingsPageContainer = ({
 
   return (
     <ScrollWrapper componentInstanceId={componentInstanceId}>
-      <StyledSettingsPageContainer>{children}</StyledSettingsPageContainer>
+      <StyledSettingsPageContainer isMobile={isMobile}>
+        {children}
+      </StyledSettingsPageContainer>
     </ScrollWrapper>
   );
 };