feat(proxy): add edit and delete functionality for proxies

- Add new API endpoints for modifying and deleting proxies
- Implement UI components for edit and delete actions
- Update proxy form to handle both create and edit modes
- Add confirmation modal for delete operation

src/api/index.js

@@ -94,7 +94,11 @@ export const instanceApi = {
     getInstanceProxies: (instanceID) => 
         api.get(`/frpcAct/proxyMgr/list?instanceID=${instanceID}`),
     createProxy: (instanceID, proxyInfo) => 
-        api.post('/frpcAct/proxyMgr/create', { instanceID, proxyInfo })
+        api.post('/frpcAct/proxyMgr/create', { instanceID, proxyInfo }),
+    modifyProxy: (instanceID, proxyInfo) => 
+        api.post('/frpcAct/proxyMgr/modify', { instanceID, proxyInfo }),
+    deleteProxy: (instanceID, proxyName) => 
+        api.post('/frpcAct/proxyMgr/delete', { instanceID, proxyName })
 };
 
 export const logApi = {