Pin the UI locale to the language setting and add theme + language selectors with a dark palette

src/shared/commands/organization.ts

@@ -1,9 +1,14 @@
-import type { ApprovalState, IdentitySource, PrincipalType, RiskLevel, RoleKey, TaskPriority, TaskStatus } from "../domain";
+import type { ApprovalState, IdentitySource, PrincipalType, RiskLevel, RoleKey, TaskPriority, TaskStatus, UiLanguage, UiTheme } from "../domain";
 
 export interface SetActiveOrganizationInput {
   orgId: string;
 }
 
+export interface SetUiPreferencesInput {
+  theme?: UiTheme;
+  language?: UiLanguage;
+}
+
 export interface DeleteOrganizationInput {
   orgId: string;
 }