feat(openclaw): add agents.defaults config support

- Add types for default model config (primary + fallbacks)
- Add types for model catalog/allowlist with aliases
- Extend OpenClawModelEntry with cost and contextWindow fields
- Add Tauri commands: get/set_openclaw_default_model, get/set_openclaw_model_catalog
- Create frontend API (src/lib/api/openclaw.ts)
- Add suggestedDefaults to provider presets with model metadata
- Add i18n translations (zh/en/ja) for openclawConfig.*

src/i18n/locales/en.json

@@ -1745,5 +1745,34 @@
       "unspecifiedHigh": "Uncategorized high-effort task category for tasks that don't fit other categories with large workload. Defaults to Claude Opus 4.6 max variant.",
       "writing": "Writing category for documentation, prose and technical writing. Defaults to Gemini 3 Flash fast generation model."
     }
+  },
+  "openclawConfig": {
+    "defaultModel": {
+      "title": "Default Model",
+      "description": "Configure the default primary model and fallback models for OpenClaw",
+      "primary": "Primary Model",
+      "primaryPlaceholder": "e.g., deepseek/deepseek-chat",
+      "fallbacks": "Fallback Models",
+      "fallbacksPlaceholder": "e.g., openrouter/anthropic/claude-sonnet-4.5",
+      "addFallback": "Add Fallback Model",
+      "saved": "Default model configuration saved",
+      "saveFailed": "Failed to save default model"
+    },
+    "modelCatalog": {
+      "title": "Model Catalog",
+      "description": "Configure model aliases and allowlist",
+      "modelId": "Model ID",
+      "modelIdPlaceholder": "e.g., deepseek/deepseek-chat",
+      "alias": "Alias",
+      "aliasPlaceholder": "e.g., DeepSeek",
+      "addEntry": "Add Model",
+      "removeEntry": "Remove",
+      "saved": "Model catalog saved",
+      "saveFailed": "Failed to save model catalog",
+      "empty": "No model catalog entries",
+      "emptyHint": "Add models to the catalog to configure aliases"
+    },
+    "suggestedDefaults": "Apply Suggested Defaults",
+    "suggestedDefaultsHint": "Use this preset's recommended default model configuration"
   }
 }

src/i18n/locales/ja.json

@@ -1726,5 +1726,34 @@
       "unspecifiedHigh": "未分類の高作業量タスクカテゴリ。他のカテゴリに該当せず作業量が大きいタスクに適用。デフォルトで Claude Opus 4.6 の max バリアントを使用。",
       "writing": "ライティングカテゴリ。ドキュメント、散文、技術文書に特化。デフォルトで Gemini 3 Flash 高速生成モデルを使用。"
     }
+  },
+  "openclawConfig": {
+    "defaultModel": {
+      "title": "デフォルトモデル",
+      "description": "OpenClaw のデフォルトのプライマリモデルとフォールバックモデルを設定します",
+      "primary": "プライマリモデル",
+      "primaryPlaceholder": "例: deepseek/deepseek-chat",
+      "fallbacks": "フォールバックモデル",
+      "fallbacksPlaceholder": "例: openrouter/anthropic/claude-sonnet-4.5",
+      "addFallback": "フォールバックモデルを追加",
+      "saved": "デフォルトモデル設定を保存しました",
+      "saveFailed": "デフォルトモデルの保存に失敗しました"
+    },
+    "modelCatalog": {
+      "title": "モデルカタログ",
+      "description": "モデルのエイリアスと許可リストを設定します",
+      "modelId": "モデル ID",
+      "modelIdPlaceholder": "例: deepseek/deepseek-chat",
+      "alias": "エイリアス",
+      "aliasPlaceholder": "例: DeepSeek",
+      "addEntry": "モデルを追加",
+      "removeEntry": "削除",
+      "saved": "モデルカタログを保存しました",
+      "saveFailed": "モデルカタログの保存に失敗しました",
+      "empty": "モデルカタログエントリがありません",
+      "emptyHint": "エイリアスを設定するにはカタログにモデルを追加してください"
+    },
+    "suggestedDefaults": "推奨デフォルト設定を適用",
+    "suggestedDefaultsHint": "このプリセットの推奨デフォルトモデル設定を使用します"
   }
 }

src/i18n/locales/zh.json

@@ -1745,5 +1745,34 @@
       "unspecifiedHigh": "未归类高工作量任务类别，适用于不适合其他类别且工作量较大的任务，默认使用 Claude Opus 4.6 的最大变体。",
       "writing": "写作类别，专注于文档、散文和技术写作，默认使用 Gemini 3 Flash 快速生成模型。"
     }
+  },
+  "openclawConfig": {
+    "defaultModel": {
+      "title": "默认模型",
+      "description": "配置 OpenClaw 的默认主模型和回退模型",
+      "primary": "主模型",
+      "primaryPlaceholder": "例如: deepseek/deepseek-chat",
+      "fallbacks": "回退模型",
+      "fallbacksPlaceholder": "例如: openrouter/anthropic/claude-sonnet-4.5",
+      "addFallback": "添加回退模型",
+      "saved": "默认模型配置已保存",
+      "saveFailed": "保存默认模型失败"
+    },
+    "modelCatalog": {
+      "title": "模型目录",
+      "description": "配置可用模型的别名和允许列表",
+      "modelId": "模型 ID",
+      "modelIdPlaceholder": "例如: deepseek/deepseek-chat",
+      "alias": "别名",
+      "aliasPlaceholder": "例如: DeepSeek",
+      "addEntry": "添加模型",
+      "removeEntry": "移除",
+      "saved": "模型目录已保存",
+      "saveFailed": "保存模型目录失败",
+      "empty": "暂无模型目录配置",
+      "emptyHint": "添加模型到目录以配置别名"
+    },
+    "suggestedDefaults": "应用建议默认配置",
+    "suggestedDefaultsHint": "使用此预设推荐的默认模型配置"
   }
 }