应用市场如果应用已存在显示为已安装

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

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

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

@@ -99,7 +99,7 @@
               type="warning" 
               @click="installApp(app)"
             >
-              {{ t('Update') }}
+              {{ t('Installed') }}
             </n-button>
             <n-button 
               v-else