fix: Enable Lingui recommended rules and fix all translation violations (#14133)

- Enable lingui/no-single-variables-to-translate and all other
recommended Lingui rules
- Fix single variable translation patterns (t`${variable}` → variable)
- Fix expression-in-message violations by extracting variables
- Fix t-call-in-function violations by moving translations inside
functions
- Update ESLint configs to use linguiPlugin.configs['flat/recommended']
- Clean up unused imports and improve translation patterns

packages/twenty-front/src/modules/ui/navigation/navigation-drawer/components/MultiWorkspaceDropdown/internal/MultiWorkspaceDropdownThemesComponents.tsx

@@ -35,7 +35,13 @@ export const MultiWorkspaceDropdownThemesComponents = () => {
           <MenuItem
             key={theme.id}
             LeftIcon={theme.icon}
-            text={t`${theme.id}`}
+            text={
+              theme.id === 'System'
+                ? t`System`
+                : theme.id === 'Dark'
+                  ? t`Dark`
+                  : t`Light`
+            }
             onClick={() => setColorScheme(theme.id)}
             RightIcon={theme.id === colorScheme ? IconCheck : undefined}
           />