feat(instance): add getInstanceInfo endpoint and refactor instance loading

- Add new getInstanceInfo API endpoint to fetch complete instance details
- Refactor instance loading logic to use single API call instead of multiple
- Update Instances.vue and InstanceDetail.vue to use new endpoint
- Remove redundant status/config loading functions

src/api/index.js

@@ -82,6 +82,8 @@ export const instanceApi = {
         api.post('/frpcAct/instanceMgr/stop', { instanceID }),
     restartInstance: (instanceID) => 
         api.post('/frpcAct/instanceMgr/restart', { instanceID }),
+    getInstanceInfo: (instanceID) => 
+        api.get(`/frpcAct/instanceMgr/getInfo?instanceID=${instanceID}`),
     getInstanceStatus: (instanceID) => 
         api.get(`/frpcAct/instanceMgr/status?instanceID=${instanceID}`),
     getInstanceLogs: (instanceID) =>