feat(i18n): add Japanese language support

src/i18n/config.js

@@ -20,6 +20,7 @@ import enAuth from './locales/en/auth.json';
 import enSidebar from './locales/en/sidebar.json';
 import enChat from './locales/en/chat.json';
 import enCodeEditor from './locales/en/codeEditor.json';
+import enTasks from './locales/en/tasks.json';
 
 import koCommon from './locales/ko/common.json';
 import koSettings from './locales/ko/settings.json';
@@ -35,6 +36,14 @@ import zhSidebar from './locales/zh-CN/sidebar.json';
 import zhChat from './locales/zh-CN/chat.json';
 import zhCodeEditor from './locales/zh-CN/codeEditor.json';
 
+import jaCommon from './locales/ja/common.json';
+import jaSettings from './locales/ja/settings.json';
+import jaAuth from './locales/ja/auth.json';
+import jaSidebar from './locales/ja/sidebar.json';
+import jaChat from './locales/ja/chat.json';
+import jaCodeEditor from './locales/ja/codeEditor.json';
+import jaTasks from './locales/ja/tasks.json';
+
 // Import supported languages configuration
 import { languages } from './languages.js';
 
@@ -66,6 +75,7 @@ i18n
         sidebar: enSidebar,
         chat: enChat,
         codeEditor: enCodeEditor,
+        tasks: enTasks,
       },
       ko: {
         common: koCommon,
@@ -83,6 +93,15 @@ i18n
         chat: zhChat,
         codeEditor: zhCodeEditor,
       },
+      ja: {
+        common: jaCommon,
+        settings: jaSettings,
+        auth: jaAuth,
+        sidebar: jaSidebar,
+        chat: jaChat,
+        codeEditor: jaCodeEditor,
+        tasks: jaTasks,
+      },
     },
 
     // Default language
@@ -95,7 +114,7 @@ i18n
     debug: import.meta.env.DEV,
 
     // Namespaces - load only what's needed
-    ns: ['common', 'settings', 'auth', 'sidebar', 'chat', 'codeEditor'],
+    ns: ['common', 'settings', 'auth', 'sidebar', 'chat', 'codeEditor', 'tasks'],
     defaultNS: 'common',
 
     // Key separator for nested keys (default: '.')

src/i18n/languages.js

@@ -24,6 +24,11 @@ export const languages = [
     label: 'Simplified Chinese',
     nativeName: '简体中文',
   },
+  {
+    value: 'ja',
+    label: 'Japanese',
+    nativeName: '日本語',
+  },
 ];
 
 /**

src/i18n/locales/en/tasks.json

@@ -0,0 +1,142 @@
+{
+  "notConfigured": {
+    "title": "TaskMaster AI is not configured",
+    "description": "TaskMaster helps break down complex projects into manageable tasks with AI-powered assistance",
+    "whatIsTitle": "🎯 What is TaskMaster?",
+    "features": {
+      "aiPowered": "AI-Powered Task Management: Break complex projects into manageable subtasks",
+      "prdTemplates": "PRD Templates: Generate tasks from Product Requirements Documents",
+      "dependencyTracking": "Dependency Tracking: Understand task relationships and execution order",
+      "progressVisualization": "Progress Visualization: Kanban boards and detailed task analytics",
+      "cliIntegration": "CLI Integration: Use taskmaster commands for advanced workflows"
+    },
+    "initializeButton": "Initialize TaskMaster AI"
+  },
+  "gettingStarted": {
+    "title": "Getting Started with TaskMaster",
+    "subtitle": "TaskMaster is initialized! Here's what to do next:",
+    "steps": {
+      "createPRD": {
+        "title": "Create a Product Requirements Document (PRD)",
+        "description": "Discuss your project idea and create a PRD that describes what you want to build.",
+        "addButton": "Add PRD",
+        "existingPRDs": "Existing PRDs:"
+      },
+      "generateTasks": {
+        "title": "Generate Tasks from PRD",
+        "description": "Once you have a PRD, ask your AI assistant to parse it and TaskMaster will automatically break it down into manageable tasks with implementation details."
+      },
+      "analyzeTasks": {
+        "title": "Analyze & Expand Tasks",
+        "description": "Ask your AI assistant to analyze task complexity and expand them into detailed subtasks for easier implementation."
+      },
+      "startBuilding": {
+        "title": "Start Building",
+        "description": "Ask your AI assistant to begin working on tasks, update their status, and add new tasks as your project evolves."
+      }
+    },
+    "tip": "💡 Tip: Start with a PRD to get the most out of TaskMaster's AI-powered task generation"
+  },
+  "setupModal": {
+    "title": "TaskMaster Setup",
+    "subtitle": "Interactive CLI for {{projectName}}",
+    "willStart": "TaskMaster initialization will start automatically",
+    "completed": "TaskMaster setup completed! You can now close this window.",
+    "closeButton": "Close",
+    "closeContinueButton": "Close & Continue"
+  },
+  "helpGuide": {
+    "title": "Getting Started with TaskMaster",
+    "subtitle": "Your guide to productive task management",
+    "examples": {
+      "parsePRD": "💬 Example:\n\"I've just initialized a new project with Claude Task Master. I have a PRD at .taskmaster/docs/prd.txt. Can you help me parse it and set up the initial tasks?\"",
+      "expandTask": "💬 Example:\n\"Task 5 seems complex. Can you break it down into subtasks?\"",
+      "addTask": "💬 Example:\n\"Please add a new task to implement user profile image uploads using Cloudinary, research the best approach.\""
+    },
+    "moreExamples": "View more examples and usage patterns →",
+    "proTips": {
+      "title": "💡 Pro Tips",
+      "search": "Use the search bar to quickly find specific tasks",
+      "views": "Switch between Kanban, List, and Grid views using the view toggles",
+      "filters": "Use filters to focus on specific task statuses or priorities",
+      "details": "Click on any task to view detailed information and manage subtasks"
+    },
+    "learnMore": {
+      "title": "📚 Learn More",
+      "description": "TaskMaster AI is an advanced task management system built for developers. Get documentation, examples, and contribute to the project.",
+      "githubButton": "View on GitHub"
+    }
+  },
+  "search": {
+    "placeholder": "Search tasks..."
+  },
+  "filters": {
+    "button": "Filters",
+    "status": "Status",
+    "priority": "Priority",
+    "sortBy": "Sort By",
+    "allStatuses": "All Statuses",
+    "allPriorities": "All Priorities",
+    "showing": "Showing {{filtered}} of {{total}} tasks",
+    "clearFilters": "Clear Filters"
+  },
+  "sort": {
+    "id": "ID",
+    "status": "Status",
+    "priority": "Priority",
+    "idAsc": "ID (Ascending)",
+    "idDesc": "ID (Descending)",
+    "titleAsc": "Title (A-Z)",
+    "titleDesc": "Title (Z-A)",
+    "statusAsc": "Status (Pending First)",
+    "statusDesc": "Status (Done First)",
+    "priorityAsc": "Priority (High First)",
+    "priorityDesc": "Priority (Low First)"
+  },
+  "views": {
+    "kanban": "Kanban view",
+    "list": "List view",
+    "grid": "Grid view"
+  },
+  "kanban": {
+    "pending": "📋 To Do",
+    "inProgress": "🚀 In Progress",
+    "done": "✅ Done",
+    "blocked": "🚫 Blocked",
+    "deferred": "⏳ Deferred",
+    "cancelled": "❌ Cancelled",
+    "noTasksYet": "No tasks yet",
+    "tasksWillAppear": "Tasks will appear here",
+    "moveTasksHere": "Move tasks here when started",
+    "completedTasksHere": "Completed tasks appear here",
+    "statusTasksHere": "Tasks with this status will appear here"
+  },
+  "buttons": {
+    "help": "TaskMaster Getting Started Guide",
+    "prds": "PRDs",
+    "addPRD": "Add PRD",
+    "addTask": "Add Task",
+    "createNewPRD": "Create New PRD",
+    "prdsAvailable": "{{count}} PRD(s) available"
+  },
+  "prd": {
+    "modified": "Modified: {{date}}"
+  },
+  "statuses": {
+    "pending": "Pending",
+    "in-progress": "In Progress",
+    "done": "Done",
+    "blocked": "Blocked",
+    "deferred": "Deferred",
+    "cancelled": "Cancelled"
+  },
+  "priorities": {
+    "high": "High",
+    "medium": "Medium",
+    "low": "Low"
+  },
+  "noMatchingTasks": {
+    "title": "No tasks match your filters",
+    "description": "Try adjusting your search or filter criteria."
+  }
+}

src/i18n/locales/ja/auth.json

@@ -0,0 +1,37 @@
+{
+  "login": {
+    "title": "おかえりなさい",
+    "description": "Claude Code UIアカウントにサインイン",
+    "username": "ユーザー名",
+    "password": "パスワード",
+    "submit": "サインイン",
+    "loading": "サインイン中...",
+    "errors": {
+      "invalidCredentials": "ユーザー名またはパスワードが正しくありません",
+      "requiredFields": "すべての項目を入力してください",
+      "networkError": "ネットワークエラー。もう一度お試しください。"
+    },
+    "placeholders": {
+      "username": "ユーザー名を入力",
+      "password": "パスワードを入力"
+    }
+  },
+  "register": {
+    "title": "アカウント作成",
+    "username": "ユーザー名",
+    "password": "パスワード",
+    "confirmPassword": "パスワードの確認",
+    "submit": "アカウントを作成",
+    "loading": "アカウントを作成中...",
+    "errors": {
+      "passwordMismatch": "パスワードが一致しません",
+      "usernameTaken": "このユーザー名は既に使用されています",
+      "weakPassword": "パスワードが弱すぎます"
+    }
+  },
+  "logout": {
+    "title": "サインアウト",
+    "confirm": "サインアウトしてもよろしいですか？",
+    "button": "サインアウト"
+  }
+}