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/components/chat/ChangedFilesList.tsx

@@ -1,6 +1,7 @@
 import React from 'react';
 import { FileTypeIcon } from '@/components/icons/FileTypeIcon';
 import { type ChangedFileEntry, getDisplayPath, getFileStats } from './changedFiles';
+import { useI18n } from '@/lib/i18n';
 
 interface ChangedFilesListProps {
     files: ChangedFileEntry[];
@@ -9,10 +10,11 @@ interface ChangedFilesListProps {
 }
 
 export const ChangedFilesList: React.FC<ChangedFilesListProps> = ({ files, currentDirectory, onOpenFile }) => {
+    const { t } = useI18n();
     return (
         <>
             <div className="flex items-center gap-1.5 px-2 py-1 typography-ui-label font-medium text-muted-foreground">
-                <span>Changed files</span>
+                <span>{t('chat.changedFiles.title')}</span>
                 <span className="typography-meta tabular-nums">{files.length}</span>
             </div>
 
@@ -26,7 +28,7 @@ export const ChangedFilesList: React.FC<ChangedFilesListProps> = ({ files, curre
                             key={`${file.path}:${index}`}
                             type="button"
                             className="relative flex w-full cursor-pointer items-center gap-2 rounded-lg px-2 py-1 typography-ui-label outline-hidden select-none text-left hover:bg-interactive-hover"
-                            title={`Open ${file.path}`}
+                            title={t('chat.changedFiles.actions.openFileTitle', { path: file.path })}
                             onClick={() => onOpenFile(file)}
                         >
                             <FileTypeIcon filePath={file.path} className="h-3.5 w-3.5 flex-shrink-0" />