fix(ui): improve AboutSection styling and version detection

- Add framer-motion animations for smooth page transitions
- Unify button sizes and add icons for consistency
- Add gradient backgrounds and hover effects to cards
- Add notInstalled i18n translations (zh/en/ja)
- Fix version detection when stdout/stderr is empty

src/i18n/locales/en.json

@@ -17,6 +17,7 @@
     "about": "About",
     "version": "Version",
     "loading": "Loading...",
+    "notInstalled": "Not installed",
     "success": "Success",
     "error": "Error",
     "unknown": "Unknown",
@@ -28,7 +29,10 @@
     "formatError": "Format failed: {{error}}",
     "copy": "Copy",
     "view": "View",
-    "back": "Back"
+    "back": "Back",
+    "refresh": "Refresh",
+    "refreshing": "Refreshing...",
+    "notInstalled": "Not installed"
   },
   "apiKeyInput": {
     "placeholder": "Enter API Key",
@@ -205,6 +209,11 @@
     "releaseNotes": "Release Notes",
     "viewReleaseNotes": "View release notes for this version",
     "viewCurrentReleaseNotes": "View current version release notes",
+    "oneClickInstall": "One-click Install",
+    "oneClickInstallHint": "Install Claude Code / Codex / Gemini CLI",
+    "localEnvCheck": "Local environment check",
+    "installCommandsCopied": "Install commands copied",
+    "installCommandsCopyFailed": "Copy failed, please copy manually.",
     "importFailedError": "Import config failed: {{message}}",
     "exportFailedError": "Export config failed:",
     "restartRequired": "Restart Required",

src/i18n/locales/ja.json

@@ -17,6 +17,7 @@
     "about": "バージョン情報",
     "version": "バージョン",
     "loading": "読み込み中...",
+    "notInstalled": "未インストール",
     "success": "成功",
     "error": "エラー",
     "unknown": "不明",
@@ -28,7 +29,10 @@
     "formatError": "整形に失敗しました: {{error}}",
     "copy": "コピー",
     "view": "表示",
-    "back": "戻る"
+    "back": "戻る",
+    "refresh": "更新",
+    "refreshing": "更新中...",
+    "notInstalled": "未インストール"
   },
   "apiKeyInput": {
     "placeholder": "API Key を入力",
@@ -205,6 +209,11 @@
     "releaseNotes": "リリースノート",
     "viewReleaseNotes": "このバージョンのリリースノートを見る",
     "viewCurrentReleaseNotes": "現在のバージョンのリリースノートを見る",
+    "oneClickInstall": "ワンクリックインストール",
+    "oneClickInstallHint": "Claude Code / Codex / Gemini CLI をインストール",
+    "localEnvCheck": "ローカル環境チェック",
+    "installCommandsCopied": "インストールコマンドをコピーしました",
+    "installCommandsCopyFailed": "コピーに失敗しました。手動でコピーしてください。",
     "importFailedError": "設定のインポートに失敗しました: {{message}}",
     "exportFailedError": "設定のエクスポートに失敗しました:",
     "restartRequired": "再起動が必要です",

src/i18n/locales/zh.json

@@ -17,6 +17,7 @@
     "about": "关于",
     "version": "版本",
     "loading": "加载中...",
+    "notInstalled": "未安装",
     "success": "成功",
     "error": "错误",
     "unknown": "未知",
@@ -28,7 +29,10 @@
     "formatError": "格式化失败：{{error}}",
     "copy": "复制",
     "view": "查看",
-    "back": "返回"
+    "back": "返回",
+    "refresh": "刷新",
+    "refreshing": "刷新中...",
+    "notInstalled": "未安装"
   },
   "apiKeyInput": {
     "placeholder": "请输入API Key",
@@ -205,6 +209,11 @@
     "releaseNotes": "更新日志",
     "viewReleaseNotes": "查看该版本更新日志",
     "viewCurrentReleaseNotes": "查看当前版本更新日志",
+    "oneClickInstall": "一键安装",
+    "oneClickInstallHint": "安装 Claude Code / Codex / Gemini CLI",
+    "localEnvCheck": "本地环境检查",
+    "installCommandsCopied": "安装命令已复制",
+    "installCommandsCopyFailed": "复制失败，请手动复制。",
     "importFailedError": "导入配置失败：{{message}}",
     "exportFailedError": "导出配置失败:",
     "restartRequired": "需要重启应用",