feat: complete internationalization (i18n) for components

Implemented comprehensive i18n translation support for the following components:

1. GitSettings.jsx - Git configuration interface
2. ApiKeysSettings.jsx - API keys settings
3. CredentialsSettings.jsx - Credentials settings (GitHub tokens)
4. TasksSettings.jsx - TaskMaster task management settings
5. ChatInterface.jsx - Chat interface (major translation work)

New translation files:
- src/i18n/locales/en/chat.json - English chat interface translations
- src/i18n/locales/zh-CN/chat.json - Chinese chat interface translations

ChatInterface.jsx translations:
- Code block copy buttons (Copy, Copied, Copy code)
- Message type labels (User, Error, Tool, Claude, Cursor, Codex)
- Tool settings tooltip
- Search result display (pattern, in, results)
- Codex permission modes (Default, Accept Edits, Bypass Permissions, Plan)
- Input placeholder and hint text
- Keyboard shortcut hints (Ctrl+Enter/Enter modes)
- Command menu button

i18n configuration updates:
- Registered chat namespace in config.js
- Extended settings.json translations (git, apiKeys, tasks, agents, mcpServers sections)

完成以下组件的 i18n 翻译工作：

1. GitSettings.jsx - Git 配置界面
2. ApiKeysSettings.jsx - API 密钥设置
3. CredentialsSettings.jsx - 凭据设置（GitHub Token）
4. TasksSettings.jsx - TaskMaster 任务管理设置
5. ChatInterface.jsx - 聊天界面（主要翻译工作）

新增翻译文件：
- src/i18n/locales/en/chat.json - 英文聊天界面翻译
- src/i18n/locales/zh-CN/chat.json - 中文聊天界面翻译

ChatInterface.jsx 翻译内容：
- 代码块复制按钮
- 消息类型标签
- 工具设置提示
- 搜索结果显示
- Codex 权限模式（默认、编辑、无限制、计划模式）
- 输入框占位符和提示文本
- 键盘快捷键提示
- 命令菜单按钮

更新 i18n 配置：
- 在 config.js 中注册 chat 命名空间
- 扩展 settings.json 翻译（git、apiKeys、tasks、agents、mcpServers 等部分）

src/i18n/locales/en/settings.json

@@ -7,6 +7,7 @@
     "appearance": "Appearance"
   },
   "account": {
+    "title": "Account",
     "language": "Language",
     "languageLabel": "Display Language",
     "languageDescription": "Choose your preferred language for the interface",
@@ -15,13 +16,6 @@
     "profile": "Profile",
     "changePassword": "Change Password"
   },
-  "permissions": {
-    "allowedTools": "Allowed Tools",
-    "disallowedTools": "Disallowed Tools",
-    "addTool": "Add Tool",
-    "removeTool": "Remove Tool",
-    "description": "Configure which tools Claude can use. Tools must be enabled here before Claude can access them."
-  },
   "mcp": {
     "title": "MCP Servers",
     "addServer": "Add Server",
@@ -71,5 +65,337 @@
     "autoScrollToBottom": "Auto-scroll to bottom",
     "sendByCtrlEnter": "Send by Ctrl+Enter",
     "sendByCtrlEnterDescription": "When enabled, pressing Ctrl+Enter will send the message instead of just Enter. This is useful for IME users to avoid accidental sends."
+  },
+  "mainTabs": {
+    "agents": "Agents",
+    "appearance": "Appearance",
+    "git": "Git",
+    "apiTokens": "API & Tokens",
+    "tasks": "Tasks"
+  },
+  "appearanceSettings": {
+    "darkMode": {
+      "label": "Dark Mode",
+      "description": "Toggle between light and dark themes"
+    },
+    "projectSorting": {
+      "label": "Project Sorting",
+      "description": "How projects are ordered in the sidebar",
+      "alphabetical": "Alphabetical",
+      "recentActivity": "Recent Activity"
+    },
+    "codeEditor": {
+      "title": "Code Editor",
+      "theme": {
+        "label": "Editor Theme",
+        "description": "Default theme for the code editor"
+      },
+      "wordWrap": {
+        "label": "Word Wrap",
+        "description": "Enable word wrapping by default in the editor"
+      },
+      "showMinimap": {
+        "label": "Show Minimap",
+        "description": "Display a minimap for easier navigation in diff view"
+      },
+      "lineNumbers": {
+        "label": "Show Line Numbers",
+        "description": "Display line numbers in the editor"
+      },
+      "fontSize": {
+        "label": "Font Size",
+        "description": "Editor font size in pixels"
+      }
+    }
+  },
+  "mcpForm": {
+    "title": {
+      "add": "Add MCP Server",
+      "edit": "Edit MCP Server"
+    },
+    "importMode": {
+      "form": "Form Input",
+      "json": "JSON Import"
+    },
+    "scope": {
+      "label": "Scope",
+      "userGlobal": "User (Global)",
+      "projectLocal": "Project (Local)",
+      "userDescription": "User scope: Available across all projects on your machine",
+      "projectDescription": "Local scope: Only available in the selected project",
+      "cannotChange": "Scope cannot be changed when editing an existing server"
+    },
+    "fields": {
+      "serverName": "Server Name",
+      "transportType": "Transport Type",
+      "command": "Command",
+      "arguments": "Arguments (one per line)",
+      "jsonConfig": "JSON Configuration",
+      "url": "URL",
+      "envVars": "Environment Variables (KEY=value, one per line)",
+      "headers": "Headers (KEY=value, one per line)",
+      "selectProject": "Select a project..."
+    },
+    "placeholders": {
+      "serverName": "my-server"
+    },
+    "validation": {
+      "missingType": "Missing required field: type",
+      "stdioRequiresCommand": "stdio type requires a command field",
+      "httpRequiresUrl": "{{type}} type requires a url field",
+      "invalidJson": "Invalid JSON format",
+      "jsonHelp": "Paste your MCP server configuration in JSON format. Example formats:",
+      "jsonExampleStdio": "• stdio: {\"type\":\"stdio\",\"command\":\"npx\",\"args\":[\"@upstash/context7-mcp\"]}",
+      "jsonExampleHttp": "• http/sse: {\"type\":\"http\",\"url\":\"https://api.example.com/mcp\"}"
+    },
+    "configDetails": "Configuration Details (from {{configFile}})",
+    "projectPath": "Path: {{path}}",
+    "actions": {
+      "cancel": "Cancel",
+      "saving": "Saving...",
+      "addServer": "Add Server",
+      "updateServer": "Update Server"
+    }
+  },
+  "saveStatus": {
+    "success": "Settings saved successfully!",
+    "error": "Failed to save settings",
+    "saving": "Saving..."
+  },
+  "footerActions": {
+    "save": "Save Settings",
+    "cancel": "Cancel"
+  },
+  "git": {
+    "title": "Git Configuration",
+    "description": "Configure your git identity for commits. These settings will be applied globally via <code />git config --global<code />",
+    "name": {
+      "label": "Git Name",
+      "help": "Your name for git commits"
+    },
+    "email": {
+      "label": "Git Email",
+      "help": "Your email for git commits"
+    },
+    "actions": {
+      "save": "Save Configuration",
+      "saving": "Saving..."
+    },
+    "status": {
+      "success": "Saved successfully"
+    }
+  },
+  "apiKeys": {
+    "title": "API Keys",
+    "description": "Generate API keys to access the external API from other applications.",
+    "newKey": {
+      "alertTitle": "⚠️ Save Your API Key",
+      "alertMessage": "This is the only time you'll see this key. Store it securely.",
+      "iveSavedIt": "I've saved it"
+    },
+    "form": {
+      "placeholder": "API Key Name (e.g., Production Server)",
+      "createButton": "Create",
+      "cancelButton": "Cancel"
+    },
+    "newButton": "New API Key",
+    "empty": "No API keys created yet.",
+    "list": {
+      "created": "Created:",
+      "lastUsed": "Last used:"
+    },
+    "confirmDelete": "Are you sure you want to delete this API key?",
+    "status": {
+      "active": "Active",
+      "inactive": "Inactive"
+    },
+    "github": {
+      "title": "GitHub Tokens",
+      "description": "Add GitHub Personal Access Tokens to clone private repositories via the external API.",
+      "descriptionAlt": "Add GitHub Personal Access Tokens to clone private repositories. You can also pass tokens directly in API requests without storing them.",
+      "addButton": "Add Token",
+      "form": {
+        "namePlaceholder": "Token Name (e.g., Personal Repos)",
+        "tokenPlaceholder": "GitHub Personal Access Token (ghp_...)",
+        "descriptionPlaceholder": "Description (optional)",
+        "addButton": "Add Token",
+        "cancelButton": "Cancel",
+        "howToCreate": "How to create a GitHub Personal Access Token →"
+      },
+      "empty": "No GitHub tokens added yet.",
+      "added": "Added:",
+      "confirmDelete": "Are you sure you want to delete this GitHub token?"
+    },
+    "apiDocsLink": "API Documentation",
+    "documentation": {
+      "title": "External API Documentation",
+      "description": "Learn how to use the external API to trigger Claude/Cursor sessions from your applications.",
+      "viewLink": "View API Documentation →"
+    },
+    "loading": "Loading...",
+    "version": {
+      "updateAvailable": "Update available: v{{version}}"
+    }
+  },
+  "tasks": {
+    "checking": "Checking TaskMaster installation...",
+    "notInstalled": {
+      "title": "TaskMaster AI CLI Not Installed",
+      "description": "TaskMaster CLI is required to use task management features. Install it to get started:",
+      "installCommand": "npm install -g task-master-ai",
+      "viewOnGitHub": "View on GitHub",
+      "afterInstallation": "After installation:",
+      "steps": {
+        "restart": "Restart this application",
+        "autoAvailable": "TaskMaster features will automatically become available",
+        "initCommand": "Use task-master init in your project directory"
+      }
+    },
+    "settings": {
+      "enableLabel": "Enable TaskMaster Integration",
+      "enableDescription": "Show TaskMaster tasks, banners, and sidebar indicators across the interface"
+    }
+  },
+  "agents": {
+    "authStatus": {
+      "checking": "Checking...",
+      "connected": "Connected",
+      "notConnected": "Not connected",
+      "disconnected": "Disconnected",
+      "checkingAuth": "Checking authentication status...",
+      "loggedInAs": "Logged in as {{email}}",
+      "authenticatedUser": "authenticated user"
+    },
+    "account": {
+      "claude": {
+        "description": "Anthropic Claude AI assistant"
+      },
+      "cursor": {
+        "description": "Cursor AI-powered code editor"
+      },
+      "codex": {
+        "description": "OpenAI Codex AI assistant"
+      }
+    },
+    "connectionStatus": "Connection Status",
+    "login": {
+      "title": "Login",
+      "reAuthenticate": "Re-authenticate",
+      "description": "Sign in to your {{agent}} account to enable AI features",
+      "reAuthDescription": "Sign in with a different account or refresh credentials",
+      "button": "Login",
+      "reLoginButton": "Re-login"
+    },
+    "error": "Error: {{error}}"
+  },
+  "permissions": {
+    "title": "Permission Settings",
+    "skipPermissions": {
+      "label": "Skip permission prompts (use with caution)",
+      "claudeDescription": "Equivalent to --dangerously-skip-permissions flag",
+      "cursorDescription": "Equivalent to -f flag in Cursor CLI"
+    },
+    "allowedTools": {
+      "title": "Allowed Tools",
+      "description": "Tools that are automatically allowed without prompting for permission",
+      "placeholder": "e.g., \"Bash(git log:*)\" or \"Write\"",
+      "quickAdd": "Quick add common tools:",
+      "empty": "No allowed tools configured"
+    },
+    "blockedTools": {
+      "title": "Blocked Tools",
+      "description": "Tools that are automatically blocked without prompting for permission",
+      "placeholder": "e.g., \"Bash(rm:*)\"",
+      "empty": "No blocked tools configured"
+    },
+    "allowedCommands": {
+      "title": "Allowed Shell Commands",
+      "description": "Shell commands that are automatically allowed without prompting",
+      "placeholder": "e.g., \"Shell(ls)\" or \"Shell(git status)\"",
+      "quickAdd": "Quick add common commands:",
+      "empty": "No allowed commands configured"
+    },
+    "blockedCommands": {
+      "title": "Blocked Shell Commands",
+      "description": "Shell commands that are automatically blocked",
+      "placeholder": "e.g., \"Shell(rm -rf)\" or \"Shell(sudo)\"",
+      "empty": "No blocked commands configured"
+    },
+    "toolExamples": {
+      "title": "Tool Pattern Examples:",
+      "bashGitLog": "- Allow all git log commands",
+      "bashGitDiff": "- Allow all git diff commands",
+      "write": "- Allow all Write tool usage",
+      "bashRm": "- Block all rm commands (dangerous)"
+    },
+    "shellExamples": {
+      "title": "Shell Command Examples:",
+      "ls": "- Allow ls command",
+      "gitStatus": "- Allow git status",
+      "npmInstall": "- Allow npm install",
+      "rmRf": "- Block recursive delete"
+    },
+    "codex": {
+      "permissionMode": "Permission Mode",
+      "description": "Controls how Codex handles file modifications and command execution",
+      "modes": {
+        "default": {
+          "title": "Default",
+          "description": "Only trusted commands (ls, cat, grep, git status, etc.) run automatically. Other commands are skipped. Can write to workspace."
+        },
+        "acceptEdits": {
+          "title": "Accept Edits",
+          "description": "All commands run automatically within the workspace. Full auto mode with sandboxed execution."
+        },
+        "bypassPermissions": {
+          "title": "Bypass Permissions",
+          "description": "Full system access with no restrictions. All commands run automatically with full disk and network access. Use with caution."
+        }
+      },
+      "technicalDetails": "Technical details",
+      "technicalInfo": {
+        "default": "sandboxMode=workspace-write, approvalPolicy=untrusted. Trusted commands: cat, cd, grep, head, ls, pwd, tail, git status/log/diff/show, find (without -exec), etc.",
+        "acceptEdits": "sandboxMode=workspace-write, approvalPolicy=never. All commands auto-execute within project directory.",
+        "bypassPermissions": "sandboxMode=danger-full-access, approvalPolicy=never. Full system access, use only in trusted environments.",
+        "overrideNote": "You can override this per-session using the mode button in the chat interface."
+      }
+    },
+    "actions": {
+      "add": "Add"
+    }
+  },
+  "mcpServers": {
+    "title": "MCP Servers",
+    "description": {
+      "claude": "Model Context Protocol servers provide additional tools and data sources to Claude",
+      "cursor": "Model Context Protocol servers provide additional tools and data sources to Cursor",
+      "codex": "Model Context Protocol servers provide additional tools and data sources to Codex"
+    },
+    "addButton": "Add MCP Server",
+    "empty": "No MCP servers configured",
+    "serverType": "Type",
+    "scope": {
+      "local": "local",
+      "user": "user"
+    },
+    "config": {
+      "command": "Command",
+      "url": "URL",
+      "args": "Args",
+      "environment": "Environment"
+    },
+    "tools": {
+      "title": "Tools",
+      "count": "({{count}}):",
+      "more": "+{{count}} more"
+    },
+    "actions": {
+      "edit": "Edit server",
+      "delete": "Delete server"
+    },
+    "help": {
+      "title": "About Codex MCP",
+      "description": "Codex supports stdio-based MCP servers. You can add servers that extend Codex's capabilities with additional tools and resources."
+    }
   }
 }