refactor(api): standardize responses and restore media config contracts

app/locales/en-US.json

@@ -97,6 +97,7 @@
     }
   },
   "messages": {
+    "调用工具失败": "Tool call failed",
     "无效的媒体来源": "Invalid media source",
     "该媒体来源不支持此音乐接口": "This media source is not supported by this music endpoint",
     "媒体来源和媒体 ID 必须同时提供": "Media source and media ID must be provided together",
@@ -1370,6 +1371,10 @@
       "source": "同步媒体服务器 - {name}",
       "target": "Sync Media Server - {name}"
     },
+    {
+      "source": "调用工具失败: {error}",
+      "target": "Tool call failed: {error}"
+    },
     {
       "source": "{name} 执行完成",
       "target": "{name_i18n} completed"

app/locales/zh-TW.json

@@ -97,6 +97,7 @@
     }
   },
   "messages": {
+    "调用工具失败": "調用工具失敗",
     "媒体来源和媒体 ID 必须同时提供": "媒體來源和媒體 ID 必須同時提供",
     "media_source 和 media_id 必须同时提供": "media_source 和 media_id 必須同時提供",
     "模块不支持测试": "模組不支援測試",
@@ -1366,6 +1367,10 @@
       "source": "同步媒体服务器 - {name}",
       "target": "同步媒體伺服器 - {name}"
     },
+    {
+      "source": "调用工具失败: {error}",
+      "target": "調用工具失敗: {error}"
+    },
     {
       "source": "{name} 执行完成",
       "target": "{name_i18n} 執行完成"