diff --git a/cmd/ohos/HomeAgent/entry/src/main/ets/common/ConnStore.ets b/cmd/ohos/HomeAgent/entry/src/main/ets/common/ConnStore.ets
index 8b0a299..49e62b4 100644
--- a/cmd/ohos/HomeAgent/entry/src/main/ets/common/ConnStore.ets
+++ b/cmd/ohos/HomeAgent/entry/src/main/ets/common/ConnStore.ets
@@ -1,7 +1,7 @@
 import { preferences } from '@kit.ArkData';
 import { Context } from '@kit.AbilityKit';
 import { deviceInfo } from '@kit.BasicServicesKit';
-import { ConnectionConfig, AppSettings, emptySettings, defaultConnection } from '../model/Model';
+import { ConnectionConfig, AppSettings, emptySettings, defaultConnection, normalizeBaseUrl } from '../model/Model';
 
 const PREF_NAME: string = 'homeagent_prefs';
 const KEY_CONNECTIONS: string = 'connections_json';
@@ -31,6 +31,12 @@ export class ConnStore {
       } catch (e) {
         this.connections = [];
       }
+      // 存量数据可能是旧版本存进去的裸域名或带尾斜杠的地址，读出来时一并规范化，
+      // 否则老用户升级后仍然会拼出错误的请求地址。
+      for (let i = 0; i < this.connections.length; i++) {
+        const c: ConnectionConfig = this.connections[i];
+        c.url = normalizeBaseUrl(c.url);
+      }
     }
     const settingsJson: string = await this.prefs.get(KEY_SETTINGS, '') as string;
     if (settingsJson.length > 0) {
@@ -42,18 +48,8 @@ export class ConnStore {
     }
   }
 
-  // 首次启动时预置默认连接（用户后端），避免所有页面空白
-  async ensureDefaultConnection(): Promise<void> {
-    await this.load();
-    if (this.connections.length > 0) {
-      return;
-    }
-    const conn: ConnectionConfig = defaultConnection();
-    conn.id = 'default';
-    this.connections.push(conn);
-    this.settings.currentConnId = conn.id;
-    await this.save();
-  }
+  // 不预置任何连接：地址与密钥属于用户私有配置，不能随源码分发。
+  // 连接列表为空时各页面走"尚未配置后端连接"的统一提示，用户到设置页添加。
 
   getConnections(): ConnectionConfig[] {
     return this.connections;
@@ -82,7 +78,7 @@ export class ConnStore {
     const conn: ConnectionConfig = defaultConnection();
     conn.id = Date.now().toString(36) + Math.floor(Math.random() * 10000).toString(36);
     conn.name = name;
-    conn.url = url;
+    conn.url = normalizeBaseUrl(url);
     conn.apiKey = apiKey;
     conn.type = 'webui';
     this.connections.push(conn);
@@ -99,7 +95,7 @@ export class ConnStore {
       const c: ConnectionConfig = this.connections[i];
       if (c.id === id) {
         c.name = name;
-        c.url = url;
+        c.url = normalizeBaseUrl(url);
         c.apiKey = apiKey;
         break;
       }
diff --git a/cmd/ohos/HomeAgent/entry/src/main/ets/entryability/EntryAbility.ets b/cmd/ohos/HomeAgent/entry/src/main/ets/entryability/EntryAbility.ets
index bcc6163..7962c91 100644
--- a/cmd/ohos/HomeAgent/entry/src/main/ets/entryability/EntryAbility.ets
+++ b/cmd/ohos/HomeAgent/entry/src/main/ets/entryability/EntryAbility.ets
@@ -81,7 +81,6 @@ export default class EntryAbility extends UIAbility {
     windowStage.getMainWindow((err: BusinessError, win: window.Window) => {
       if (err.code !== 0) {
         connStore.init(this.context).then(async () => {
-          await connStore.ensureDefaultConnection();
           const cur = connStore.getCurrentConnection();
           if (cur !== null) {
             apiClient.setConnection(cur);
@@ -100,7 +99,6 @@ export default class EntryAbility extends UIAbility {
         console.warn('[HomeAgent] setWindowLayoutFullScreen failed: ' + (e as Error).message);
       }
       connStore.init(this.context).then(async () => {
-        await connStore.ensureDefaultConnection();
         const cur = connStore.getCurrentConnection();
         if (cur !== null) {
           apiClient.setConnection(cur);
diff --git a/cmd/ohos/HomeAgent/entry/src/main/ets/model/Model.ets b/cmd/ohos/HomeAgent/entry/src/main/ets/model/Model.ets
index b291562..d12dad6 100644
--- a/cmd/ohos/HomeAgent/entry/src/main/ets/model/Model.ets
+++ b/cmd/ohos/HomeAgent/entry/src/main/ets/model/Model.ets
@@ -163,12 +163,45 @@ export function emptySettings(): AppSettings {
   return s;
 }
 
+/**
+ * 规范化用户填写的后端地址。
+ *
+ * 用户习惯直接敲域名（homeagent.example.xyz）或粘贴带路径的地址。
+ * 三件事必须在存库前做掉，否则请求会以各种方式失败：
+ *
+ * 1) 补协议，且默认 https。
+ *    很多反代把 http 整站 302 到别的主机（例如门户站 www.xxx），
+ *    重定向后的主机没有 API，客户端只会拿到 404 页面而不是 401/200，
+ *    表现为"连接直接失败"且看不出原因。默认 https 可以绕过整类问题。
+ *    只有明确写了 http:// 的内网地址才走明文。
+ * 2) 去掉结尾斜杠，避免拼出 //api/v1。
+ * 3) 去掉用户误粘的 /api/v1 后缀，避免拼成 /api/v1/api/v1。
+ */
+export function normalizeBaseUrl(raw: string): string {
+  let u: string = raw.trim();
+  if (u.length === 0) {
+    return '';
+  }
+  const lower: string = u.toLowerCase();
+  if (!lower.startsWith('http://') && !lower.startsWith('https://')) {
+    u = 'https://' + u;
+  }
+  u = u.replace(/\/+$/, '');
+  u = u.replace(/\/api\/v1$/, '');
+  return u;
+}
+
+/**
+ * 新建连接用的空白模板。
+ * 这里不能写死任何地址或密钥：源码是公开的，硬编码等于把内网地址和访问凭据一起发布。
+ * 地址与 API Key 由用户在「设置 - 连接」里填写，未配置时各页面统一提示（见 UserError.MSG_NO_CONN）。
+ */
 export function defaultConnection(): ConnectionConfig {
   const c: ConnectionConfig = {
     id: '',
     name: 'HomeAgent',
-    url: 'http://192.168.2.60:8080',
-    apiKey: 'jinrui233719',
+    url: '',
+    apiKey: '',
     type: 'webui',
   };
   return c;
diff --git a/cmd/ohos/HomeAgent/entry/src/main/ets/pages/SettingsPage.ets b/cmd/ohos/HomeAgent/entry/src/main/ets/pages/SettingsPage.ets
index de3ad16..d2222dc 100644
--- a/cmd/ohos/HomeAgent/entry/src/main/ets/pages/SettingsPage.ets
+++ b/cmd/ohos/HomeAgent/entry/src/main/ets/pages/SettingsPage.ets
@@ -854,7 +854,7 @@ export struct SettingsPage {
             .onChange((v: string) => {
               this.editName = v;
             })
-          TextInput({ placeholder: '地址 (如 http://192.168.1.100:8080)', text: this.editUrl })
+          TextInput({ placeholder: '地址 (域名或 http://192.168.1.100:8080)', text: this.editUrl })
             .height(36).fontSize(13).fontColor(this.palette().textPrimary)
             .placeholderColor(this.palette().textMuted).backgroundColor(this.palette().bgInput)
             .borderRadius(RADIUS_SM).border({ width: 1, color: this.palette().border })