Add i18n foundation and translations (#1027)

* feat: add i18n foundation

* feat: localize sessions sidebar

* Localize multirun/scheduled tasks and fix dialog dropdown interactions

* localize git sidebar surface and add zh-CN keys

* feat(ui): localize context panel, diff/plan views, and context sidebar content

* fix(config): resolve user config home via fs/home before embedded home

* localize header/chat UI and complete model/worktree panel strings

* localize worktree + github issue/pr dialog flows

* localize settings sections and split settings i18n dictionaries

* localize additional settings sections and sidebars

* localize more settings pages and dialogs

* fix settings select trigger localization

* localize tunnel settings ui surface

* localize additional settings sections

* localize keyboard shortcuts labels in settings

* localize terminal and utility dialogs surfaces

* feat(i18n): localize remaining UI strings

* Add Ukrainian locale

* Add Spanish locale

* Add Brazilian Portuguese locale

* Polish locale translations

packages/ui/src/lib/utils.ts

@@ -2,6 +2,7 @@ import { clsx, type ClassValue } from "clsx";
 import { twMerge } from "tailwind-merge";
 import { isTauriShell } from "@/lib/desktop";
 import { matchesFuzzyQuery } from "@/lib/search/fuzzySearch";
+import type { I18nKey } from "@/lib/i18n";
 
 export function cn(...inputs: ClassValue[]) {
   return twMerge(clsx(inputs));
@@ -21,10 +22,10 @@ export const isWindows = (): boolean => {
   return /Windows/.test(navigator.userAgent || '');
 };
 
-export const getRevealLabel = (): string => {
-  if (isMacOS()) return 'Reveal in Finder';
-  if (isWindows()) return 'Open in File Explorer';
-  return 'Open in File Manager';
+export const getRevealLabelKey = (): I18nKey => {
+  if (isMacOS()) return 'common.revealPath.finder';
+  if (isWindows()) return 'common.revealPath.fileExplorer';
+  return 'common.revealPath.fileManager';
 };
 
 /**