feat: 添加后端服务地址自定义配置功能

- 在设置面板添加后端服务地址配置项
   - 支持保存、加载和重置自定义配置
   - 配置持久化存储，重启后保留
   - 添加 SSE 请求日志用于验证配置

src/views/ICViewProvider.ts

@@ -13,6 +13,7 @@ import {
   abortCurrentDialog,
   handleOptimizePrompt,
 } from "../utils/messageHandler";
+import { setCustomConfig } from "../config/settings";
 
 /**
  * 创建并显示IC 侧边栏视图
@@ -141,6 +142,21 @@ export function showICHelperPanel(context: vscode.ExtensionContext) {
         case "optimizePrompt":
           handleOptimizePrompt(panel, message.prompt);
           break;
+        // 保存通用设置
+        case "saveGeneralSettings":
+          context.globalState.update('generalSettings', message.settings);
+          // 更新运行时配置（包括清空）
+          setCustomConfig({ backendUrl: message.settings.backendUrl || '' });
+          vscode.window.showInformationMessage('设置已保存');
+          break;
+        // 加载通用设置
+        case "loadGeneralSettings":
+          const settings = context.globalState.get('generalSettings');
+          panel.webview.postMessage({
+            command: 'loadedGeneralSettings',
+            settings: settings
+          });
+          break;
       }
     },
     undefined,
@@ -213,6 +229,20 @@ export class ICViewProvider implements vscode.WebviewViewProvider {
           if (message.url) {
             vscode.env.openExternal(vscode.Uri.parse(message.url));
           }
+        } else if (message.command === "saveGeneralSettings") {
+          // 保存通用设置
+          this.context.globalState.update('generalSettings', message.settings);
+          if (message.settings.backendUrl) {
+            setCustomConfig({ backendUrl: message.settings.backendUrl });
+          }
+          vscode.window.showInformationMessage('设置已保存');
+        } else if (message.command === "loadGeneralSettings") {
+          // 加载通用设置
+          const settings = this.context.globalState.get('generalSettings');
+          webviewView.webview.postMessage({
+            command: 'loadedGeneralSettings',
+            settings: settings
+          });
         }
       },
       undefined,