feat(instanceDetails): replace API logs with WebSocket for real-time updates

Implement WebSocket connection for instance logs to enable real-time updates instead of periodic API polling. Remove deprecated API endpoints and update log display styling with level-specific backgrounds. Add cleanup on component unmount to prevent memory leaks.

src/api/index.js

@@ -86,8 +86,6 @@ export const instanceApi = {
         api.get(`/frpcAct/instanceMgr/getInfo?instanceID=${instanceID}`),
     getInstanceStatus: (instanceID) => 
         api.get(`/frpcAct/instanceMgr/status?instanceID=${instanceID}`),
-    getInstanceLogs: (instanceID) => 
-        api.post('/frpcAct/instanceMgr/logs', { instanceID }),
     getInstanceProxies: (instanceID) => 
         api.get(`/frpcAct/proxyMgr/list?instanceID=${instanceID}`),
     createProxy: (instanceID, proxyInfo) => 
@@ -109,9 +107,6 @@ export const systemInfoApi = {
 export default api;
 
 export const TODO_API_NOTES = {
-    instanceLogs: 'TODO: /frpcAct/instanceMgr/logs - 获取实例日志 API 未在 api-backend.md 中定义',
-    instanceProxies: 'TODO: /frpcAct/instanceMgr/proxies - 获取实例代理列表 API 未在 api-backend.md 中定义',
-    logList: 'TODO: /logMgr/list - 获取系统日志 API 未在 api-backend.md 中定义',
     monitorStats: 'TODO: /monitor/stats - 获取系统监控数据 API 未在 api-backend.md 中定义',
     systemInfo: 'TODO: /system/info - 获取系统信息 API 未在 api-backend.md 中定义'
 };