feat: replace with native Android empty-shell UI (Main/Settings + stub ServerClient/WatchBridge)

app/src/main/AndroidManifest.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <application
+        android:allowBackup="true"
+        android:label="@string/app_name"
+        android:theme="@style/Theme.DSHWatch">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+        <activity
+            android:name=".SettingsActivity"
+            android:exported="false" />
+    </application>
+</manifest>

app/src/main/java/com/dshwatch/app/MainActivity.java

@@ -0,0 +1,38 @@
+package com.dshwatch.app;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+public class MainActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        TextView status = findViewById(R.id.status_text);
+        status.setText(getString(R.string.status_disconnected));
+
+        Button settings = findViewById(R.id.btn_settings);
+        settings.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                startActivity(new Intent(MainActivity.this, SettingsActivity.class));
+            }
+        });
+
+        Button refresh = findViewById(R.id.btn_refresh);
+        refresh.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                // 空壳：后续调用 ServerClient 拉取 Harness 状态
+                status.setText(R.string.status_disconnected);
+            }
+        });
+    }
+}

app/src/main/java/com/dshwatch/app/ServerClient.java

@@ -0,0 +1,31 @@
+package com.dshwatch.app;
+
+/**
+ * Harness 服务器客户端（空壳）。
+ * 后续接入 WebSocket（OkHttp ws），通过 DSHWatch_Server 或直连 dsh-watch 插件，
+ * 实现 harness.status / session.prompt / session.list 等 RPC。
+ */
+public class ServerClient {
+    private String serverUrl;
+    private String userId;
+    private String token;
+
+    public ServerClient(String serverUrl, String userId, String token) {
+        this.serverUrl = serverUrl;
+        this.userId = userId;
+        this.token = token;
+    }
+
+    public void connect() {
+        // 空壳：TODO 实现 WebSocket 握手 + 请求/响应 + 事件回调
+    }
+
+    public void sendRequest(String method, String paramsJson, Callback cb) {
+        // 空壳：TODO
+    }
+
+    public interface Callback {
+        void onResult(String json);
+        void onError(String message);
+    }
+}

app/src/main/java/com/dshwatch/app/SettingsActivity.java

@@ -0,0 +1,35 @@
+package com.dshwatch.app;
+
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.Toast;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+public class SettingsActivity extends AppCompatActivity {
+
+    private EditText serverUrl;
+    private EditText userId;
+    private EditText token;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_settings);
+
+        serverUrl = findViewById(R.id.input_server);
+        userId = findViewById(R.id.input_user);
+        token = findViewById(R.id.input_token);
+
+        Button save = findViewById(R.id.btn_save);
+        save.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                // 空壳：后续持久化到 SharedPreferences / 安全存储
+                Toast.makeText(SettingsActivity.this, "保存(空壳): " + serverUrl.getText(), Toast.LENGTH_SHORT).show();
+            }
+        });
+    }
+}

app/src/main/java/com/dshwatch/app/WatchBridge.java

@@ -0,0 +1,15 @@
+package com.dshwatch.app;
+
+/**
+ * 手表 BLE 互联桥（空壳）。
+ * 后续接入小米穿戴 SDK：Wearable / MessageApi / sendMessage / addListener，
+ * 用于把手表(DSHWatch) 与手机端双向转发。
+ */
+public interface WatchBridge {
+    /** 连接手表（小米穿戴服务） */
+    void connect();
+    /** 发送消息给手表 */
+    void sendToWatch(String json);
+    /** 接收来自手表的消息 */
+    String onWatchMessage(String json);
+}

app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:padding="24dp"
+    android:background="@color/deep_blue">
+
+    <TextView
+        android:id="@+id/title"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/app_name"
+        android:textColor="@color/white"
+        android:textSize="24sp"
+        android:textStyle="bold" />
+
+    <TextView
+        android:id="@+id/status_text"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="24dp"
+        android:text="@string/status_disconnected"
+        android:textColor="@color/white"
+        android:textSize="16sp" />
+
+    <Button
+        android:id="@+id/btn_refresh"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="@string/btn_refresh" />
+
+    <Button
+        android:id="@+id/btn_settings"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="12dp"
+        android:text="@string/btn_settings" />
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="32dp"
+        android:text="@string/shell_hint"
+        android:textColor="@color/light_blue"
+        android:textSize="13sp" />
+</LinearLayout>

app/src/main/res/layout/activity_settings.xml

@@ -0,0 +1,69 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:padding="24dp"
+    android:background="@color/deep_blue">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/settings_title"
+        android:textColor="@color/white"
+        android:textSize="22sp"
+        android:textStyle="bold" />
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="20dp"
+        android:text="@string/label_server"
+        android:textColor="@color/light_blue" />
+
+    <EditText
+        android:id="@+id/input_server"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:hint="@string/hint_server"
+        android:textColor="@color/white"
+        android:textColorHint="@color/light_blue" />
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="@string/label_user"
+        android:textColor="@color/light_blue" />
+
+    <EditText
+        android:id="@+id/input_user"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:hint="@string/hint_user"
+        android:textColor="@color/white"
+        android:textColorHint="@color/light_blue" />
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="@string/label_token"
+        android:textColor="@color/light_blue" />
+
+    <EditText
+        android:id="@+id/input_token"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:hint="@string/hint_token"
+        android:inputType="textPassword"
+        android:textColor="@color/white"
+        android:textColorHint="@color/light_blue" />
+
+    <Button
+        android:id="@+id/btn_save"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="24dp"
+        android:text="@string/btn_save" />
+</LinearLayout>

app/src/main/res/values/colors.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="deep_blue">#0B1220</color>
+    <color name="white">#FFFFFF</color>
+    <color name="light_blue">#B7C8E8</color>
+</resources>

app/src/main/res/values/strings.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">DSHWatch Phone</string>
+    <string name="status_disconnected">未连接（空壳）</string>
+    <string name="btn_refresh">刷新状态</string>
+    <string name="btn_settings">设置</string>
+    <string name="settings_title">设置</string>
+    <string name="label_server">服务器地址</string>
+    <string name="hint_server">ws://host:port</string>
+    <string name="label_user">用户ID</string>
+    <string name="hint_user">userId</string>
+    <string name="label_token">Token</string>
+    <string name="hint_token">token</string>
+    <string name="btn_save">保存（空壳）</string>
+    <string name="shell_hint">空壳 UI：后续接入 DSHWatch_Server + 小米穿戴 SDK（BLE 网关）。</string>
+</resources>

app/src/main/res/values/themes.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="Theme.DSHWatch" parent="Theme.MaterialComponents.DayNight.NoActionBar">
+        <item name="colorPrimary">#33B4FF</item>
+        <item name="colorPrimaryDark">#0B1220</item>
+        <item name="colorAccent">#33B4FF</item>
+        <item name="android:windowBackground">@color/deep_blue</item>
+    </style>
+</resources>