节点市场如果节点已存在就显示已安装

apps/jingrow/frontend/src/locales/zh-CN.json

@@ -897,6 +897,7 @@
   "Repository": "仓库",
   "Install": "安装",
   "Update": "更新",
+  "Installed": "已安装",
   "Loading applications...": "正在加载应用...",
   "No applications found": "未找到应用",
   "View details feature coming soon": "查看详情功能即将推出",

apps/jingrow/frontend/src/views/dev/NodeDetail.vue

@@ -19,10 +19,10 @@
           >
             <template #icon>
               <n-icon>
-                <Icon :icon="isCurrentNodeInstalled ? 'tabler:refresh' : 'tabler:download'" />
+                <Icon :icon="isCurrentNodeInstalled ? 'tabler:check' : 'tabler:download'" />
               </n-icon>
             </template>
-            {{ isCurrentNodeInstalled ? t('Update') : t('Install') }}
+            {{ isCurrentNodeInstalled ? t('Installed') : t('Install') }}
           </n-button>
         </div>
       </div>

apps/jingrow/frontend/src/views/dev/NodeMarketplace.vue

@@ -95,7 +95,7 @@
                 type="warning" 
                 @click="installNode(node)"
               >
-                {{ t('Update') }}
+                {{ t('Installed') }}
               </n-button>
               <n-button 
                 v-else