feat: Display Vercel configuration sync status and last sync time, and clear API tester streaming output before new requests.

webui/src/locales/en.json

@@ -221,6 +221,10 @@
         "syncSucceeded": "Sync succeeded",
         "syncFailedLabel": "Sync failed",
         "openDeployment": "Open deployment",
+        "statusSynced": "Synced",
+        "statusNotSynced": "Not synced",
+        "statusNeverSynced": "Never synced",
+        "lastSyncTime": "Last sync: {time}",
         "howItWorks": "How it works",
         "steps": {
             "one": "The current configuration (keys and accounts) is exported as JSON.",
@@ -229,4 +233,4 @@
             "four": "Trigger a redeploy to apply the updated environment variables."
         }
     }
-}
+}

webui/src/locales/zh.json

@@ -221,6 +221,10 @@
         "syncSucceeded": "同步成功",
         "syncFailedLabel": "同步失败",
         "openDeployment": "访问部署地址",
+        "statusSynced": "已同步",
+        "statusNotSynced": "未同步",
+        "statusNeverSynced": "从未同步",
+        "lastSyncTime": "上次同步: {time}",
         "howItWorks": "工作原理",
         "steps": {
             "one": "当前配置 (密钥和账号) 被导出为 JSON 字符串。",
@@ -229,4 +233,4 @@
             "four": "触发重新部署以应用新的环境变量。"
         }
     }
-}
+}