Fix shutdown API, update connection state after shutdown

src/api.rs

@@ -253,30 +253,20 @@ impl ProxmoxClient {
 
     pub async fn shutdown_node(&self, node: &str) -> Result<String, String> {
         let url = format!("{}/nodes/{}/status", self.base_url, node);
-        println!("[API] 关机请求: POST {}", url);
-        println!("[API] Headers: Authorization={}", self.auth_header());
         
         let resp = self.client
             .post(&url)
             .header("Authorization", self.auth_header())
-            .header("Content-Type", "application/json")
-            .json(&serde_json::json!({"command": "shutdown"}))
+            .form(&[("command", "shutdown")])
             .send()
             .await
-            .map_err(|e| {
-                let err = format!("网络错误: {}", e);
-                println!("[API] {}", err);
-                err
-            })?;
+            .map_err(|e| format!("网络错误: {}", e))?;
         
         let status = resp.status();
-        let body = resp.text().await.unwrap_or_default();
-        println!("[API] 响应状态: {}", status);
-        println!("[API] 响应内容: {}", body);
-        
         if !status.is_success() {
+            let body = resp.text().await.unwrap_or_default();
             return Err(format!("HTTP {}: {}", status, body));
         }
-        Ok(body)
+        Ok("ok".to_string())
     }
 }

src/gui.rs

@@ -530,8 +530,10 @@ impl eframe::App for App {
                             if let Some(c) = client.as_ref() {
                                 match c.shutdown_node(&node).await {
                                     Ok(response) => {
-                                        state.write().unwrap().add_log("✓ 关机命令发送成功");
-                                        state.write().unwrap().add_log(&format!("响应: {}", response));
+                                        let mut s = state.write().unwrap();
+                                        s.add_log("✓ 关机命令发送成功");
+                                        s.add_log(&format!("响应: {}", response));
+                                        s.is_connected = false;
                                     }
                                     Err(e) => {
                                         state.write().unwrap().add_log(&format!("✗ 关机失败: {}", e));