fix(publish): clarify duplicate version upload errors

web/src/i18n/locales/en.json

@@ -472,6 +472,8 @@
     "error": "Publish Failed",
     "timeoutTitle": "Publish timed out",
     "timeoutDescription": "The publish request took too long. Please check the skill list later or try again.",
+    "versionExistsTitle": "Version already exists",
+    "versionExistsDescription": "This skill version has already been published. Update the version in SKILL.md, rebuild the package, and upload it again.",
     "selectRequired": "Please select namespace and file"
   },
   "toast": {

web/src/i18n/locales/zh.json

@@ -472,6 +472,8 @@
     "error": "发布失败",
     "timeoutTitle": "发布请求超时",
     "timeoutDescription": "本次发布等待时间过长，请稍后到技能列表确认结果，或重新尝试发布。",
+    "versionExistsTitle": "版本号已存在",
+    "versionExistsDescription": "当前技能版本已经发布过，请修改 SKILL.md 中的 version 后重新打包上传。",
     "selectRequired": "请选择命名空间和文件"
   },
   "toast": {

web/src/pages/dashboard/publish.tsx

@@ -10,6 +10,16 @@ import { useMyNamespaces, usePublishSkill } from '@/shared/hooks/use-skill-queri
 import { toast } from '@/shared/lib/toast'
 import { ApiError } from '@/api/client'
 
+function isVersionExistsMessage(message?: string): boolean {
+  if (!message) {
+    return false
+  }
+
+  return message.includes('error.skill.version.exists')
+    || message.includes('Version already exists')
+    || message.includes('版本已存在')
+}
+
 export function PublishPage() {
   const { t } = useTranslation()
   const navigate = useNavigate()
@@ -44,6 +54,15 @@ export function PublishPage() {
         toast.error(t('publish.timeoutTitle'), t('publish.timeoutDescription'))
         return
       }
+
+      if (error instanceof ApiError && isVersionExistsMessage(error.serverMessage || error.message)) {
+        toast.error(
+          t('publish.versionExistsTitle'),
+          t('publish.versionExistsDescription'),
+        )
+        return
+      }
+
       toast.error(t('publish.error'), error instanceof Error ? error.message : '')
     }
   }