diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
deleted file mode 100644
index c640e20..0000000
--- a/.github/copilot-instructions.md
+++ /dev/null
@@ -1,15 +0,0 @@
-- [ ] Clarify Project Requirements
-- [x] Scaffold the Project
-- [ ] Customize the Project
-- [ ] Install Required Extensions
-- [ ] Compile the Project
-- [ ] Create and Run Task
-- [ ] Launch the Project
-- [ ] Ensure Documentation is Complete
-
-# 项目说明
-本项目为 backup_script 脚本提供 Android 图形化操作界面，支持本地运行脚本、参数配置、结果展示。
-
-## 进度说明
-- 已完成项目结构搭建与主要文件生成。
-- 下一步将完善脚本调用、参数配置与界面交互细节。
diff --git a/app/MainActivity.kt b/app/MainActivity.kt
deleted file mode 100644
index bc721fd..0000000
--- a/app/MainActivity.kt
+++ /dev/null
@@ -1,44 +0,0 @@
-package com.example.androidbackupgui
-
-import android.os.Bundle
-import android.widget.*
-import androidx.appcompat.app.AppCompatActivity
-import java.io.BufferedReader
-import java.io.DataOutputStream
-import java.io.InputStreamReader
-
-class MainActivity : AppCompatActivity() {
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_main)
-
-        val paramInput = findViewById<EditText>(R.id.paramInput)
-        val runButton = findViewById<Button>(R.id.runButton)
-        val resultView = findViewById<TextView>(R.id.resultView)
-
-        runButton.setOnClickListener {
-            val params = paramInput.text.toString()
-            val result = runShellScript(params)
-            resultView.text = result
-        }
-    }
-
-    private fun runShellScript(params: String): String {
-        // 假设脚本已复制到 /data/data/com.example.androidbackupgui/files/scripts/tools.sh
-        val scriptPath = filesDir.absolutePath + "/scripts/tools.sh"
-        val cmd = "sh $scriptPath $params"
-        return try {
-            val process = Runtime.getRuntime().exec(arrayOf("su", "-c", cmd))
-            val reader = BufferedReader(InputStreamReader(process.inputStream))
-            val output = StringBuilder()
-            var line: String?
-            while (reader.readLine().also { line = it } != null) {
-                output.append(line).append("\n")
-            }
-            reader.close()
-            output.toString()
-        } catch (e: Exception) {
-            "执行失败: ${e.message}"
-        }
-    }
-}
diff --git a/app/activity_main.xml b/app/activity_main.xml
deleted file mode 100644
index d54406e..0000000
--- a/app/activity_main.xml
+++ /dev/null
@@ -1,29 +0,0 @@
-<?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="16dp">
-
-    <EditText
-        android:id="@+id/paramInput"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:hint="输入脚本参数" />
-
-    <Button
-        android:id="@+id/runButton"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="运行脚本" />
-
-    <TextView
-        android:id="@+id/resultView"
-        android:layout_width="match_parent"
-        android:layout_height="0dp"
-        android:layout_weight="1"
-        android:text="结果输出..."
-        android:background="#EEE"
-        android:padding="8dp" />
-
-</LinearLayout>
diff --git a/app/build.gradle b/app/build.gradle
index 9937435..01e9106 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -2,20 +2,31 @@ apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 
 android {
-    compileSdkVersion 34
+    namespace "com.example.androidbackupgui"
+    compileSdk 34
     defaultConfig {
         applicationId "com.example.androidbackupgui"
-        minSdkVersion 24
-        targetSdkVersion 34
+        minSdk 24
+        targetSdk 34
         versionCode 1
         versionName "1.0"
     }
+    buildFeatures {
+        viewBinding true
+    }
     buildTypes {
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
+    }
+    kotlinOptions {
+        jvmTarget = '17'
+    }
 }
 
 dependencies {
@@ -24,4 +35,9 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.6.1'
     implementation 'com.google.android.material:material:1.11.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
+    implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.7.0'
+    implementation 'androidx.preference:preference-ktx:1.2.1'
+    implementation 'androidx.fragment:fragment-ktx:1.6.2'
+    implementation 'androidx.viewpager2:viewpager2:1.0.0'
+
 }
diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
new file mode 100644
index 0000000..fb164d6
--- /dev/null
+++ b/app/proguard-rules.pro
@@ -0,0 +1 @@
+# Add project specific ProGuard rules here.
diff --git a/app/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
similarity index 55%
rename from app/AndroidManifest.xml
rename to app/src/main/AndroidManifest.xml
index 5656c92..6ef9163 100644
--- a/app/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -1,15 +1,20 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.example.androidbackupgui">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
 
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
-        android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
-        android:theme="@style/Theme.AppCompat.Light.DarkActionBar">
-        <activity android:name=".MainActivity">
+        android:theme="@style/AppTheme">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:windowSoftInputMode="adjustResize">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
diff --git a/app/src/main/assets/restic/arm64-v8a/restic b/app/src/main/assets/restic/arm64-v8a/restic
new file mode 100755
index 0000000..ca14e77
Binary files /dev/null and b/app/src/main/assets/restic/arm64-v8a/restic differ
diff --git a/app/src/main/java/com/example/androidbackupgui/MainActivity.kt b/app/src/main/java/com/example/androidbackupgui/MainActivity.kt
new file mode 100644
index 0000000..c24f88c
--- /dev/null
+++ b/app/src/main/java/com/example/androidbackupgui/MainActivity.kt
@@ -0,0 +1,74 @@
+package com.example.androidbackupgui
+
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowCompat
+import androidx.core.view.WindowInsetsCompat
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.FragmentActivity
+import androidx.viewpager2.adapter.FragmentStateAdapter
+import androidx.viewpager2.widget.ViewPager2
+import com.example.androidbackupgui.databinding.ActivityMainBinding
+import com.example.androidbackupgui.ui.BackupFragment
+import com.example.androidbackupgui.ui.ConfigFragment
+import com.example.androidbackupgui.ui.RestoreFragment
+import com.google.android.material.color.DynamicColors
+
+class MainActivity : AppCompatActivity() {
+
+    private lateinit var binding: ActivityMainBinding
+
+    private val pageTitles = listOf("應用備份", "應用恢復", "備份配置")
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        DynamicColors.applyToActivitiesIfAvailable(application)
+        WindowCompat.setDecorFitsSystemWindows(window, false)
+
+        binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        // Edge-to-edge: pad toolbar below status bar
+        ViewCompat.setOnApplyWindowInsetsListener(binding.topAppBar) { view, insets ->
+            val statusBars = insets.getInsets(WindowInsetsCompat.Type.statusBars())
+            view.setPadding(view.paddingLeft, statusBars.top, view.paddingRight, view.paddingBottom)
+            insets
+        }
+
+        val fragments = listOf(
+            BackupFragment(),
+            RestoreFragment(),
+            ConfigFragment()
+        )
+
+        binding.viewPager.adapter = TabAdapter(this, fragments)
+        binding.viewPager.isUserInputEnabled = true
+
+        binding.bottomNav.setOnItemSelectedListener { item ->
+            when (item.itemId) {
+                R.id.nav_backup -> binding.viewPager.currentItem = 0
+                R.id.nav_restore -> binding.viewPager.currentItem = 1
+                R.id.nav_config -> binding.viewPager.currentItem = 2
+            }
+            true
+        }
+
+        // Sync ViewPager -> BottomNav + Toolbar title
+        binding.viewPager.registerOnPageChangeCallback(object : ViewPager2.OnPageChangeCallback() {
+            override fun onPageSelected(position: Int) {
+                binding.bottomNav.menu.getItem(position).isChecked = true
+                binding.topAppBar.title = pageTitles[position]
+            }
+        })
+    }
+
+    private class TabAdapter(
+        activity: FragmentActivity,
+        private val fragments: List<Fragment>
+    ) : FragmentStateAdapter(activity) {
+        override fun getItemCount(): Int = fragments.size
+        override fun createFragment(position: Int): Fragment = fragments[position]
+    }
+}
diff --git a/app/src/main/java/com/example/androidbackupgui/backup/AppScanner.kt b/app/src/main/java/com/example/androidbackupgui/backup/AppScanner.kt
new file mode 100644
index 0000000..9edec97
--- /dev/null
+++ b/app/src/main/java/com/example/androidbackupgui/backup/AppScanner.kt
@@ -0,0 +1,103 @@
+package com.example.androidbackupgui.backup
+
+import com.example.androidbackupgui.root.RootShell
+import com.example.androidbackupgui.root.shellEscape
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+
+data class AppInfo(
+    val packageName: String,
+    val label: String = "",
+    val isSystem: Boolean = false,
+    val apkPaths: List<String> = emptyList(),
+    val hasObb: Boolean = false,
+    val isRunning: Boolean = false,
+    val backupSize: Long = 0  // estimated from last backup
+)
+
+object AppScanner {
+
+    /** Scan all third-party installed packages. */
+    suspend fun scanThirdParty(): List<AppInfo> = withContext(Dispatchers.IO) {
+        val result = RootShell.exec("pm list packages -3")
+        if (!result.isSuccess) return@withContext emptyList()
+
+        result.output.lines()
+            .filter { it.startsWith("package:") }
+            .map { it.removePrefix("package:").trim() }
+            .filter { it.isNotEmpty() }
+            .map { AppInfo(packageName = it) }
+    }
+
+    /** Scan all system packages. */
+    suspend fun scanSystem(config: BackupConfig): List<AppInfo> = withContext(Dispatchers.IO) {
+        val result = RootShell.exec("pm list packages -s")
+        if (!result.isSuccess) return@withContext emptyList()
+
+        val systemWhitelist = config.system.toSet()
+        val dataWhitelist = config.whitelist.toSet()
+        val blacklist = config.blacklist.toSet()
+
+        result.output.lines()
+            .filter { it.startsWith("package:") }
+            .map { it.removePrefix("package:").trim() }
+            .filter { it.isNotEmpty() }
+            .filter { pkg ->
+                // Allow if in system whitelist or data whitelist
+                pkg in systemWhitelist || pkg in dataWhitelist
+            }
+            .filter { pkg ->
+                // Exclude if in blacklist (when blacklistMode=1, full ignore)
+                if (config.blacklistMode == 1) pkg !in blacklist else true
+            }
+            .map { AppInfo(packageName = it, isSystem = true) }
+    }
+
+    /** Get APK paths for a package. */
+    suspend fun getApkPaths(packageName: String): List<String> = withContext(Dispatchers.IO) {
+        val result = RootShell.exec("pm path '${packageName.shellEscape()}'")
+        if (!result.isSuccess) return@withContext emptyList()
+
+        result.output.lines()
+            .filter { it.startsWith("package:") }
+            .map { it.removePrefix("package:").trim() }
+            .filter { it.isNotEmpty() }
+    }
+
+    /** Get the app label/name. */
+    suspend fun getAppLabel(packageName: String): String = withContext(Dispatchers.IO) {
+        val result = RootShell.exec("dumpsys package '${packageName.shellEscape()}' | grep -A1 'ApplicationInfo' | grep 'label=' | head -1")
+        val label = result.output
+            .substringAfter("label=", "")
+            .substringBefore(" ")
+            .removeSurrounding("\"")
+            .trim()
+        label.ifEmpty { packageName }
+    }
+
+    /** Check if a package has OBB data. */
+    suspend fun hasObbData(packageName: String): Boolean = withContext(Dispatchers.IO) {
+        val result = RootShell.exec("ls /storage/emulated/0/Android/obb/${packageName.shellEscape()}/ 2>/dev/null")
+        result.output.isNotBlank()
+    }
+
+    /** Check if a package is currently running. */
+    suspend fun isPackageRunning(packageName: String): Boolean = withContext(Dispatchers.IO) {
+        val result = RootShell.exec("pidof '${packageName.shellEscape()}'")
+        result.output.isNotBlank()
+    }
+
+    /** Apply appList.txt-style filters. Lines starting with # are ignored, ! means apk-only. */
+    fun parseAppList(content: String): List<Pair<String, Boolean>> {
+        return content.lines()
+            .map { it.trim() }
+            .filter { it.isNotEmpty() && !it.startsWith("#") }
+            .map { line ->
+                if (line.startsWith("!")) {
+                    line.removePrefix("!").trim() to false // apk only (no data)
+                } else {
+                    line.trim() to true // full backup
+                }
+            }
+    }
+}
diff --git a/app/src/main/java/com/example/androidbackupgui/backup/BackupConfig.kt b/app/src/main/java/com/example/androidbackupgui/backup/BackupConfig.kt
new file mode 100644
index 0000000..6dfedfd
--- /dev/null
+++ b/app/src/main/java/com/example/androidbackupgui/backup/BackupConfig.kt
@@ -0,0 +1,179 @@
+package com.example.androidbackupgui.backup
+
+import java.io.File
+
+/**
+ * Mirrors backup_settings.conf from backup_script.
+ * All keys correspond 1:1 with the original shell config.
+ */
+data class BackupConfig(
+    // Operation mode
+    var lo: Int = 0,                        // 0=volume key, 1=volume force, 2=keyboard
+    var backgroundExecution: Int = 0,       // 0=foreground, 1=background
+    var setDisplayPowerMode: Int = 0,       // 1=keep screen on during backup
+    var shellLang: String = "",             // ""=auto, "1"=zh-CN, "0"=zh-TW
+
+    // Paths
+    var outputPath: String = "",            // Custom output dir
+    var listLocation: String = "",          // Custom appList.txt location
+
+    // Update
+    var update: Int = 1,                    // 1=auto update
+    var cdn: Int = 1,                       // CDN node
+
+    // Filters
+    var mountPoint: String = "rannki|0000-1",
+    var user: String = "",
+
+    // Backup mode
+    var backupMode: Int = 1,                // 1=data+apk, 0=apk only
+    var backupUserData: Int = 1,
+    var backupObbData: Int = 1,
+    var backupMedia: Int = 0,
+    var backgroundAppsIgnore: Int = 0,
+
+    // Custom paths
+    var customPath: List<String> = listOf(
+        "/storage/emulated/0/Pictures/",
+        "/storage/emulated/0/Download/",
+        "/storage/emulated/0/Music",
+        "/storage/emulated/0/DCIM/",
+        "/data/adb"
+    ),
+
+    // Blacklist
+    var blacklistMode: Int = 0,             // 1=full ignore, 0=apk only
+    var blacklist: List<String> = emptyList(),
+
+    // Whitelists
+    var whitelist: List<String> = emptyList(),
+    var system: List<String> = emptyList(),
+
+    // Compression
+    var compressionMethod: String = "zstd", // zstd or tar
+
+    // Terminal colors
+    var rgbA: Int = 226,
+    var rgbB: Int = 123,
+    var rgbC: Int = 177,
+
+    var backupWifi: Int = 1,
+
+    // Restic deduplicated backup with rclone backend
+    var resticEnabled: Int = 0,
+    var resticRepo: String = "",
+    var resticPassword: String = "",
+    var resticBackend: String = "local",    // local / webdav / smb
+    var resticBackendUrl: String = "",
+    var resticBackendUser: String = "",
+    var resticBackendPass: String = ""
+) {
+    companion object {
+        fun fromFile(file: File): BackupConfig {
+            val config = BackupConfig()
+            if (!file.exists()) return config
+
+            val props = mutableMapOf<String, String>()
+            file.forEachLine { line ->
+                val trimmed = line.trim()
+                if (trimmed.isEmpty() || trimmed.startsWith("#")) return@forEachLine
+                val eq = trimmed.indexOf('=')
+                if (eq < 0) return@forEachLine
+                val key = trimmed.substring(0, eq).trim()
+                val value = trimmed.substring(eq + 1).trim().removeSurrounding("\"")
+                props[key] = value
+            }
+
+            fun int(key: String, default: Int = 0) = props[key]?.toIntOrNull() ?: default
+            fun str(key: String) = props[key] ?: ""
+            fun lines(key: String): List<String> {
+                val raw = props[key] ?: return emptyList()
+                return raw.split("\\s+".toRegex())
+                    .filter { it.isNotBlank() && it != "\"\"" }
+                    .map { it.replace("%20", " ") }
+            }
+
+            config.lo = int("Lo")
+            config.backgroundExecution = int("background_execution")
+            config.setDisplayPowerMode = int("setDisplayPowerMode")
+            config.shellLang = str("Shell_LANG")
+            config.outputPath = str("Output_path")
+            config.listLocation = str("list_location")
+            config.update = int("update", default = 1)
+            config.cdn = int("cdn", default = 1)
+            config.mountPoint = str("mount_point")
+            config.user = str("user")
+            config.backupMode = int("Backup_Mode", default = 1)
+            config.backupUserData = int("Backup_user_data", default = 1)
+            config.backupObbData = int("Backup_obb_data", default = 1)
+            config.backupMedia = int("backup_media")
+            config.backgroundAppsIgnore = int("Background_apps_ignore")
+            config.customPath = lines("Custom_path")
+            config.blacklistMode = int("blacklist_mode")
+            config.blacklist = lines("blacklist")
+            config.whitelist = lines("whitelist")
+            config.system = lines("system")
+            config.compressionMethod = str("Compression_method").ifEmpty { "zstd" }
+            config.rgbA = int("rgb_a").let { if (it == 0) 226 else it }
+            config.rgbB = int("rgb_b").let { if (it == 0) 123 else it }
+            config.rgbC = int("rgb_c").let { if (it == 0) 177 else it }
+            config.backupWifi = int("backup_wifi", default = 1)
+            config.resticEnabled = int("restic_enabled")
+            config.resticRepo = str("restic_repo")
+            config.resticPassword = str("restic_password")
+            config.resticBackend = str("restic_backend").ifEmpty { "local" }
+            config.resticBackendUrl = str("restic_backend_url")
+            config.resticBackendUser = str("restic_backend_user")
+            config.resticBackendPass = str("restic_backend_pass")
+
+            return config
+        }
+
+        fun toFile(config: BackupConfig, file: File) {
+            file.parentFile?.mkdirs()
+            file.writeText(buildString {
+                appendLine("# SpeedBackup Configuration")
+                appendLine("Lo=${config.lo}")
+                appendLine("background_execution=${config.backgroundExecution}")
+                appendLine("setDisplayPowerMode=${config.setDisplayPowerMode}")
+                appendLine("Shell_LANG=${config.shellLang}")
+                appendLine("Output_path=\"${config.outputPath}\"")
+                appendLine("list_location=\"${config.listLocation}\"")
+                appendLine("update=${config.update}")
+                appendLine("cdn=${config.cdn}")
+                appendLine("mount_point=\"${config.mountPoint}\"")
+                appendLine("user=${config.user}")
+                appendLine("Backup_Mode=${config.backupMode}")
+                appendLine("Backup_user_data=${config.backupUserData}")
+                appendLine("Backup_obb_data=${config.backupObbData}")
+                appendLine("backup_media=${config.backupMedia}")
+                appendLine("Background_apps_ignore=${config.backgroundAppsIgnore}")
+                append("Custom_path=\"")
+                config.customPath.forEach { append(" ${it.replace(" ", "%20")}") }
+                appendLine(" \"")
+                appendLine("blacklist_mode=${config.blacklistMode}")
+                append("blacklist=\"")
+                config.blacklist.forEach { append(" ${it.replace(" ", "%20")}") }
+                appendLine(" \"")
+                append("whitelist=\"")
+                config.whitelist.forEach { append(" ${it.replace(" ", "%20")}") }
+                appendLine(" \"")
+                append("system=\"")
+                config.system.forEach { append(" ${it.replace(" ", "%20")}") }
+                appendLine(" \"")
+                appendLine("Compression_method=${config.compressionMethod}")
+                appendLine("rgb_a=${config.rgbA}")
+                appendLine("rgb_b=${config.rgbB}")
+                appendLine("rgb_c=${config.rgbC}")
+                appendLine("backup_wifi=${config.backupWifi}")
+                appendLine("restic_enabled=${config.resticEnabled}")
+                appendLine("restic_repo=\"${config.resticRepo}\"")
+                appendLine("restic_password=\"${config.resticPassword}\"")
+                appendLine("restic_backend=${config.resticBackend}")
+                appendLine("restic_backend_url=\"${config.resticBackendUrl}\"")
+                appendLine("restic_backend_user=\"${config.resticBackendUser}\"")
+                appendLine("restic_backend_pass=\"${config.resticBackendPass}\"")
+            })
+        }
+    }
+}
diff --git a/app/src/main/java/com/example/androidbackupgui/backup/BackupOperation.kt b/app/src/main/java/com/example/androidbackupgui/backup/BackupOperation.kt
new file mode 100644
index 0000000..5b6a611
--- /dev/null
+++ b/app/src/main/java/com/example/androidbackupgui/backup/BackupOperation.kt
@@ -0,0 +1,210 @@
+package com.example.androidbackupgui.backup
+
+import com.example.androidbackupgui.root.RootShell
+import com.example.androidbackupgui.root.shellEscape
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.isActive
+import kotlinx.coroutines.withContext
+import java.io.File
+import org.json.JSONObject
+import kotlin.coroutines.coroutineContext
+
+/**
+ * Performs backup of apps and WiFi config using root shell.
+ * Mirrors the logic from backup_script's modules/backup.sh.
+ */
+object BackupOperation {
+
+    data class BackupProgress(
+        val current: Int,
+        val total: Int,
+        val packageName: String,
+        val stage: String,        // "apk", "data", "obb", "ssaid", "done"
+        val message: String
+    )
+
+    data class BackupResult(
+        val successCount: Int,
+        val failCount: Int,
+        val skippedCount: Int,
+        val outputDir: String,
+        val elapsedMs: Long
+    )
+
+    /**
+     * Backup a list of apps to the output directory.
+     * @param apps list of AppInfo to backup
+     * @param config backup configuration
+     * @param outputDir root output directory
+     * @param userId Android user ID (0, 999, etc.)
+     * @param onProgress callback for UI updates
+     */
+    suspend fun backupApps(
+        apps: List<AppInfo>,
+        config: BackupConfig,
+        outputDir: File,
+        userId: String = "0",
+        onProgress: suspend (BackupProgress) -> Unit = {}
+    ): BackupResult = withContext(Dispatchers.IO) {
+        val emit: suspend (BackupProgress) -> Unit = { p -> withContext(Dispatchers.Main) { onProgress(p) } }
+        val startTime = System.currentTimeMillis()
+
+        // Create backup structure
+        val backupRoot = File(outputDir, "Backup_${config.compressionMethod}_$userId")
+        backupRoot.mkdirs()
+
+        // Write app list
+        val appListFile = File(backupRoot, "appList.txt")
+        appListFile.writeText(apps.joinToString("\n") { it.packageName })
+
+        // Write metadata JSON
+        val metaFile = File(backupRoot, "app_details.json")
+        metaFile.writeText(buildAppDetailsJson(apps))
+
+        var success = 0
+        var fail = 0
+        var skipped = 0
+
+        for ((index, app) in apps.withIndex()) {
+            if (!coroutineContext.isActive) break
+
+            val appDir = File(backupRoot, app.packageName)
+            appDir.mkdirs()
+
+            emit(BackupProgress(index + 1, apps.size, app.packageName, "apk", "正在備份 APK…"))
+
+            // 1. Backup APK
+            val paths = AppScanner.getApkPaths(app.packageName)
+            val apkOk = if (paths.isNotEmpty()) {
+                paths.withIndex().all { (i, apkPath) ->
+                    val destName = if (paths.size > 1) "${app.packageName}_split_$i.apk" else "${app.packageName}.apk"
+                    RootShell.exec("cp '${apkPath.shellEscape()}' '${appDir.absolutePath.shellEscape()}/${destName.shellEscape()}'").isSuccess
+                }
+            } else false
+
+            if (!apkOk) {
+                fail++
+                emit(BackupProgress(index + 1, apps.size, app.packageName, "done", "APK 備份失敗"))
+                continue
+            }
+
+            // 2. Backup user data (if configured)
+            if (config.backupMode == 1 && config.backupUserData == 1) {
+                emit(BackupProgress(index + 1, apps.size, app.packageName, "data", "正在備份數據…"))
+                backupUserData(app.packageName, appDir, userId, config.compressionMethod)
+            }
+
+            // 3. Backup OBB (if configured and exists)
+            if (config.backupMode == 1 && config.backupObbData == 1) {
+                val hasObb = AppScanner.hasObbData(app.packageName)
+                if (hasObb) {
+                    emit(BackupProgress(index + 1, apps.size, app.packageName, "obb", "正在備份 OBB…"))
+                    backupObb(app.packageName, appDir, config.compressionMethod)
+                }
+            }
+
+            // 4. Backup SSAID
+            emit(BackupProgress(index + 1, apps.size, app.packageName, "ssaid", "正在備份 SSAID…"))
+            backupSsaid(app.packageName, appDir, userId)
+
+            // 5. Backup runtime permissions
+            backupPermissions(app.packageName, appDir)
+
+            success++
+            emit(BackupProgress(index + 1, apps.size, app.packageName, "done", "完成"))
+        }
+
+        val elapsed = System.currentTimeMillis() - startTime
+        RootShell.exec("chmod -R 0755 '${backupRoot.absolutePath}'")
+
+        BackupResult(
+            successCount = success,
+            failCount = fail,
+            skippedCount = skipped,
+            outputDir = backupRoot.absolutePath,
+            elapsedMs = elapsed
+        )
+    }
+
+
+    private fun backupUserData(
+        packageName: String,
+        appDir: File,
+        userId: String,
+        compression: String
+    ) {
+        val pkgEsc = packageName.shellEscape()
+        val dataDir = "/data/data/$pkgEsc"
+        val userDeDir = "/data/user_de/${userId.shellEscape()}/$pkgEsc"
+        val outputFile = "${appDir.absolutePath.shellEscape()}/${pkgEsc}_data.tar"
+
+        // Build a list of dirs that exist
+        val dirs = mutableListOf<String>()
+        if (RootShell.exec("test -d $dataDir").isSuccess) dirs.add(dataDir)
+        if (RootShell.exec("test -d $userDeDir").isSuccess) dirs.add(userDeDir)
+
+        if (dirs.isEmpty()) return
+
+        // Exclude cache, code_cache, lib
+        val excludeArgs = "--exclude='cache' --exclude='code_cache' --exclude='lib' --exclude='no_backup'"
+
+        when (compression) {
+            "zstd" -> {
+                val dirList = dirs.joinToString(" ")
+                RootShell.exec(
+                    "tar $excludeArgs -cf - $dirList 2>/dev/null | zstd -T0 -o '$outputFile.zst'"
+                )
+            }
+            else -> {
+                val dirList = dirs.joinToString(" ")
+                RootShell.exec(
+                    "tar $excludeArgs -czf '$outputFile.gz' $dirList 2>/dev/null"
+                )
+            }
+        }
+    }
+
+    private fun backupObb(packageName: String, appDir: File, compression: String) {
+        val obbDir = "/storage/emulated/0/Android/obb/${packageName.shellEscape()}"
+        val escapedAppDir = appDir.absolutePath.shellEscape()
+        val escapedPkg = packageName.shellEscape()
+
+        when (compression) {
+            "zstd" -> RootShell.exec("tar -cf - '$obbDir' 2>/dev/null | zstd -T0 -o '$escapedAppDir/${escapedPkg}_obb.tar.zst'")
+            else -> RootShell.exec("tar -czf '$escapedAppDir/${escapedPkg}_obb.tar.gz' '$obbDir' 2>/dev/null")
+        }
+    }
+
+    private fun backupSsaid(packageName: String, appDir: File, userId: String) {
+        val ssaidFile = "/data/system/users/${userId.shellEscape()}/settings_ssaid.xml"
+        val result = RootShell.exec("grep '${packageName.shellEscape()}' '$ssaidFile' 2>/dev/null")
+        if (result.output.isNotBlank()) {
+            File(appDir, "ssaid.txt").writeText(result.output)
+        }
+    }
+
+    private fun backupPermissions(packageName: String, appDir: File) {
+        val result = RootShell.exec("dumpsys package '${packageName.shellEscape()}' | grep -E 'granted=true|permission' | head -50")
+        if (result.output.isNotBlank()) {
+            File(appDir, "permissions.txt").writeText(result.output)
+        }
+    }
+
+    private fun buildAppDetailsJson(apps: List<AppInfo>): String {
+        val root = JSONObject()
+        for (app in apps) {
+            val entry = JSONObject()
+            entry.put("label", app.label)
+            entry.put("isSystem", app.isSystem)
+            root.put(app.packageName, entry)
+        }
+        return root.toString(2)
+    }
+    private fun captureSsaid(packageName: String, userId: String): String {
+        return RootShell.exec("grep '${packageName.shellEscape()}' '/data/system/users/${userId.shellEscape()}/settings_ssaid.xml' 2>/dev/null").output
+    }
+
+    private fun capturePermissions(packageName: String): String {
+        return RootShell.exec("dumpsys package '${packageName.shellEscape()}' | grep -E 'granted=true|permission' | head -50").output
+    }
+}
diff --git a/app/src/main/java/com/example/androidbackupgui/backup/ResticBinary.kt b/app/src/main/java/com/example/androidbackupgui/backup/ResticBinary.kt
new file mode 100644
index 0000000..56253c5
--- /dev/null
+++ b/app/src/main/java/com/example/androidbackupgui/backup/ResticBinary.kt
@@ -0,0 +1,110 @@
+package com.example.androidbackupgui.backup
+
+import android.content.Context
+import java.io.File
+import java.io.FileOutputStream
+
+/**
+ * Manages the restic native binary on the device.
+ *
+ * On first run, extracts the correct ABI binary from APK assets to the app's
+ * filesDir and sets executable permission. On subsequent runs, reuses the
+ * already-extracted binary.
+ *
+ * Expected asset layout:
+ *   assets/restic/arm64-v8a/restic
+ *   assets/restic/armeabi-v7a/restic
+ *   assets/restic/x86_64/restic
+ */
+object ResticBinary {
+
+    private const val ASSET_PREFIX = "restic"
+    private const val BINARY_NAME = "restic"
+
+    @Volatile
+    private var extractedPath: String? = null
+
+    /**
+     * Prepare the restic binary and return its absolute path.
+     * Extracts from assets if not already present.
+     *
+     * @return the absolute path to the restic binary, or null if extraction failed.
+     */
+    fun prepare(context: Context): String? {
+        extractedPath?.let { path ->
+            if (File(path).exists() && File(path).canExecute()) return path
+        }
+
+        val abi = detectAbi()
+        val destFile = File(context.filesDir, BINARY_NAME)
+
+        // If already extracted and executable for this ABI, reuse
+        if (destFile.exists() && destFile.canExecute()) {
+            extractedPath = destFile.absolutePath
+            return extractedPath
+        }
+
+        val assetPath = "$ASSET_PREFIX/$abi/$BINARY_NAME"
+        val success = try {
+            context.assets.open(assetPath).use { input ->
+                FileOutputStream(destFile).use { output ->
+                    input.copyTo(output)
+                }
+            }
+            // Set executable (may need root on some devices)
+            destFile.setExecutable(true, false)
+            destFile.setReadable(true, false)
+
+            // Verify
+            destFile.canExecute() && destFile.length() > 0
+        } catch (e: Exception) {
+            // Asset not found for this ABI — try fallback
+            tryFallbackExtraction(context, destFile)
+        }
+
+        if (!success) return null
+
+        extractedPath = destFile.absolutePath
+        return extractedPath
+    }
+
+    /** Try extracting from alternate ABI asset paths. */
+    private fun tryFallbackExtraction(context: Context, destFile: File): Boolean {
+        val fallbackAbis = listOf("arm64-v8a", "armeabi-v7a", "x86_64", "x86")
+        for (abi in fallbackAbis) {
+            try {
+                context.assets.open("$ASSET_PREFIX/$abi/$BINARY_NAME").use { input ->
+                    FileOutputStream(destFile).use { output ->
+                        input.copyTo(output)
+                    }
+                }
+                destFile.setExecutable(true, false)
+                destFile.setReadable(true, false)
+                if (destFile.canExecute() && destFile.length() > 0) return true
+            } catch (_: Exception) {
+                // try next
+            }
+        }
+        return false
+    }
+
+    /**
+     * Check if the binary is ready. Does NOT extract.
+     */
+    fun isReady(): Boolean {
+        val path = extractedPath ?: return false
+        return File(path).canExecute()
+    }
+
+    /** Detect the device ABI from Build.SUPPORTED_ABIS. */
+    private fun detectAbi(): String {
+        val abis = android.os.Build.SUPPORTED_ABIS ?: arrayOf("arm64-v8a")
+        return when {
+            abis.any { it.contains("arm64") || it.contains("aarch64") } -> "arm64-v8a"
+            abis.any { it.contains("armeabi") } -> "armeabi-v7a"
+            abis.any { it.contains("x86_64") } -> "x86_64"
+            abis.any { it.contains("x86") } -> "x86"
+            else -> abis.firstOrNull() ?: "arm64-v8a"
+        }
+    }
+}
diff --git a/app/src/main/java/com/example/androidbackupgui/backup/ResticWrapper.kt b/app/src/main/java/com/example/androidbackupgui/backup/ResticWrapper.kt
new file mode 100644
index 0000000..8b450df
--- /dev/null
+++ b/app/src/main/java/com/example/androidbackupgui/backup/ResticWrapper.kt
@@ -0,0 +1,488 @@
+package com.example.androidbackupgui.backup
+
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.isActive
+import kotlinx.coroutines.withContext
+import org.json.JSONArray
+import org.json.JSONObject
+import java.io.BufferedReader
+import java.io.File
+import java.io.InputStreamReader
+import kotlin.coroutines.coroutineContext
+
+/**
+ * Wraps the restic CLI binary for backup/restore operations.
+ *
+ * Uses environment variables (RESTIC_REPOSITORY, RESTIC_PASSWORD) rather than
+ * command-line flags to avoid leaking secrets in the process list.
+ *
+ * All public methods are suspend and run on Dispatchers.IO.
+ */
+object ResticWrapper {
+
+    /** Path to the restic binary. Default assumes it's on PATH (e.g. Termux). */
+    var binaryPath: String = "restic"
+
+    // ── Progress data ──────────────────────────────────
+
+    data class ResticProgress(
+        val messageType: String,       // "status" during backup
+        val percentDone: Double = 0.0,
+        val totalFiles: Int = 0,
+        val filesDone: Int = 0,
+        val totalBytes: Long = 0,
+        val bytesDone: Long = 0,
+        val currentFiles: List<String> = emptyList()
+    )
+
+    data class ResticSnapshot(
+        val id: String,
+        val shortId: String,
+        val time: String,
+        val paths: List<String>,
+        val tags: List<String>,
+        val hostname: String = ""
+    )
+
+    // ── Repository lifecycle ───────────────────────────
+
+    suspend fun init(
+        repoPath: String,
+        password: String,
+        backend: String = "local",
+        backendUrl: String = "",
+        backendUser: String = "",
+        backendPass: String = ""
+    ): Result<Unit> =
+        withContext(Dispatchers.IO) {
+            val env = buildFullEnv(repoPath, password, backend, backendUrl, backendUser, backendPass)
+            val result = runRestic(env, "init")
+            if (result.exitCode == 0 || result.exitCode == 1) {
+                // exit code 1 = already initialized, which is fine
+                Result.success(Unit)
+            } else {
+                Result.failure(Exception("restic init failed: ${result.stderr}"))
+            }
+        }
+
+    // ── Backup ─────────────────────────────────────────
+
+    data class BackupSummary(
+        val snapshotId: String,
+        val filesNew: Int,
+        val filesChanged: Int,
+        val filesUnmodified: Int,
+        val dirsNew: Int,
+        val dirsChanged: Int,
+        val dirsUnmodified: Int,
+        val dataBlobs: Int,
+        val treeBlobs: Int,
+        val dataAdded: Long,
+        val totalFilesProcessed: Int,
+        val totalBytesProcessed: Long,
+        val totalDuration: Double
+    )
+
+    suspend fun backup(
+        repoPath: String,
+        password: String,
+        paths: List<String>,
+        tags: List<String> = emptyList(),
+        hostname: String? = null,
+        backend: String = "local",
+        backendUrl: String = "",
+        backendUser: String = "",
+        backendPass: String = "",
+        onProgress: suspend (ResticProgress) -> Unit = {}
+    ): Result<BackupSummary> = withContext(Dispatchers.IO) {
+        val emit: suspend (ResticProgress) -> Unit = { p -> withContext(Dispatchers.Main) { onProgress(p) } }
+        val args = mutableListOf("backup", "--json")
+        for (path in paths) args.add(path)
+        for (tag in tags) { args.add("--tag"); args.add(tag) }
+        if (hostname != null) { args.add("--host"); args.add(hostname) }
+
+        val env = buildFullEnv(repoPath, password, backend, backendUrl, backendUser, backendPass)
+        val result = runResticStreaming(env, args) { line ->
+            if (!coroutineContext.isActive) return@runResticStreaming
+            try {
+                val json = JSONObject(line)
+                val msgType = json.optString("message_type", "")
+                if (msgType == "status") {
+                    val currentFiles = mutableListOf<String>()
+                    json.optJSONArray("current_files")?.let { arr ->
+                        for (i in 0 until arr.length()) currentFiles.add(arr.getString(i))
+                    }
+                    emit(ResticProgress(
+                        messageType = "status",
+                        percentDone = json.optDouble("percent_done", 0.0),
+                        totalFiles = json.optInt("total_files", 0),
+                        filesDone = json.optInt("files_done", 0),
+                        totalBytes = json.optLong("total_bytes", 0),
+                        bytesDone = json.optLong("bytes_done", 0),
+                        currentFiles = currentFiles
+                    ))
+                }
+            } catch (_: Exception) { /* ignore non-JSON lines */ }
+        }
+
+        if (result.exitCode != 0) {
+            return@withContext Result.failure(Exception("restic backup failed: ${result.stderr}"))
+        }
+
+        // Parse the summary JSON on the last line(s) of stdout
+        parseBackupSummary(result.stdout).fold(
+            onSuccess = { Result.success(it) },
+            onFailure = { Result.failure(it) }
+        )
+    }
+
+    // ── Restore ────────────────────────────────────────
+
+    suspend fun restore(
+        repoPath: String,
+        password: String,
+        snapshotId: String,
+        targetPath: String,
+        include: String? = null,
+        backend: String = "local",
+        backendUrl: String = "",
+        backendUser: String = "",
+        backendPass: String = "",
+        onProgress: suspend (String) -> Unit = {}
+    ): Result<Unit> = withContext(Dispatchers.IO) {
+        val emit: suspend (String) -> Unit = { s -> withContext(Dispatchers.Main) { onProgress(s) } }
+
+        File(targetPath).mkdirs()
+
+        val args = mutableListOf("restore", snapshotId, "--target", targetPath, "--json")
+        if (include != null) { args.add("--include"); args.add(include) }
+
+        val env = buildFullEnv(repoPath, password, backend, backendUrl, backendUser, backendPass)
+        val result = runResticStreaming(env, args) { line ->
+            if (!coroutineContext.isActive) return@runResticStreaming
+            try {
+                val json = JSONObject(line)
+                val msgType = json.optString("message_type", "")
+                if (msgType == "status") {
+                    val percent = "%.1f".format(json.optDouble("percent_done", 0.0) * 100)
+                    emit("恢復進度: $percent%")
+                } else if (msgType == "summary") {
+                    emit("恢復完成: ${json.optInt("total_files", 0)} 個檔案")
+                }
+            } catch (_: Exception) { emit(line) }
+        }
+
+        if (result.exitCode == 0) Result.success(Unit)
+        else Result.failure(Exception("restic restore failed: ${result.stderr}"))
+    }
+
+    // ── Snapshot listing ───────────────────────────────
+
+    suspend fun listSnapshots(
+        repoPath: String,
+        password: String,
+        tag: String? = null,
+        backend: String = "local",
+        backendUrl: String = "",
+        backendUser: String = "",
+        backendPass: String = ""
+    ): Result<List<ResticSnapshot>> = withContext(Dispatchers.IO) {
+        val args = mutableListOf("snapshots", "--json")
+        if (tag != null) { args.add("--tag"); args.add(tag) }
+
+        val env = buildFullEnv(repoPath, password, backend, backendUrl, backendUser, backendPass)
+        val result = runRestic(env, args)
+
+        if (result.exitCode != 0) {
+            return@withContext Result.failure(Exception("restic snapshots failed: ${result.stderr}"))
+        }
+
+        try {
+            val jsonArray = JSONArray(result.stdout.ifEmpty { "[]" })
+            val snapshots = (0 until jsonArray.length()).map { i ->
+                val obj = jsonArray.getJSONObject(i)
+                val pathsArr: JSONArray? = obj.optJSONArray("paths")
+                val tagsArr: JSONArray? = obj.optJSONArray("tags")
+                val pathsList: List<String> = if (pathsArr != null)
+                    (0 until pathsArr.length()).map { j -> pathsArr.getString(j) }
+                else emptyList()
+                val tagsList: List<String> = if (tagsArr != null)
+                    (0 until tagsArr.length()).map { j -> tagsArr.getString(j) }
+                else emptyList()
+                ResticSnapshot(
+                    id = obj.optString("id", ""),
+                    shortId = obj.optString("short_id", ""),
+                    time = obj.optString("time", ""),
+                    paths = pathsList,
+                    tags = tagsList,
+                    hostname = obj.optString("hostname", "")
+                )
+            }
+            Result.success(snapshots.sortedByDescending { it.time })
+        } catch (e: Exception) {
+            Result.failure(Exception("Failed to parse snapshot JSON: ${e.message}"))
+        }
+    }
+
+    // ── Maintenance ────────────────────────────────────
+
+    suspend fun forget(
+        repoPath: String,
+        password: String,
+        keepDaily: Int = 7,
+        keepWeekly: Int = 4,
+        keepMonthly: Int = 3,
+        dryRun: Boolean = false,
+        backend: String = "local",
+        backendUrl: String = "",
+        backendUser: String = "",
+        backendPass: String = ""
+    ): Result<String> = withContext(Dispatchers.IO) {
+        val args = mutableListOf(
+            "forget",
+            "--keep-daily", keepDaily.toString(),
+            "--keep-weekly", keepWeekly.toString(),
+            "--keep-monthly", keepMonthly.toString()
+        )
+        if (dryRun) args.add("--dry-run")
+
+        val env = buildFullEnv(repoPath, password, backend, backendUrl, backendUser, backendPass)
+        val result = runRestic(env, args)
+
+        if (result.exitCode == 0) Result.success(result.stdout)
+        else Result.failure(Exception("restic forget failed: ${result.stderr}"))
+    }
+
+    suspend fun prune(
+        repoPath: String,
+        password: String,
+        backend: String = "local",
+        backendUrl: String = "",
+        backendUser: String = "",
+        backendPass: String = ""
+    ): Result<String> =
+        withContext(Dispatchers.IO) {
+            val env = buildFullEnv(repoPath, password, backend, backendUrl, backendUser, backendPass)
+            val result = runRestic(env, "prune")
+            if (result.exitCode == 0) Result.success(result.stdout)
+            else Result.failure(Exception("restic prune failed: ${result.stderr}"))
+        }
+
+    suspend fun check(
+        repoPath: String,
+        password: String,
+        backend: String = "local",
+        backendUrl: String = "",
+        backendUser: String = "",
+        backendPass: String = ""
+    ): Result<String> =
+        withContext(Dispatchers.IO) {
+            val env = buildFullEnv(repoPath, password, backend, backendUrl, backendUser, backendPass)
+            val result = runRestic(env, "check")
+            if (result.exitCode == 0) Result.success(result.stdout)
+            else Result.failure(Exception("restic check failed: ${result.stderr}"))
+        }
+
+    suspend fun stats(
+        repoPath: String,
+        password: String,
+        backend: String = "local",
+        backendUrl: String = "",
+        backendUser: String = "",
+        backendPass: String = ""
+    ): Result<String> =
+        withContext(Dispatchers.IO) {
+            val env = buildFullEnv(repoPath, password, backend, backendUrl, backendUser, backendPass)
+            val result = runRestic(env, "stats")
+            if (result.exitCode == 0) Result.success(result.stdout)
+            else Result.failure(Exception("restic stats failed: ${result.stderr}"))
+        }
+
+    // ── Internal helpers ───────────────────────────────
+
+    /**
+     * Build the full command list to run restic.
+     * On Android 10+ the app's data directory is noexec; we use the system
+     * linker as a trampoline to load the binary.
+     */
+    fun buildCommandArgs(args: List<String>): List<String> {
+        val isAndroid = try {
+            Class.forName("android.os.Build")
+            true
+        } catch (_: ClassNotFoundException) {
+            false
+        }
+        if (!isAndroid) return listOf(binaryPath) + args
+
+        val linker = if (File("/system/bin/linker64").exists()) "/system/bin/linker64"
+                     else "/system/bin/linker"
+        return listOf(linker, binaryPath) + args
+    }
+
+    /** Build environment for restic, with optional rclone backend config. */
+    fun buildFullEnv(
+        repoPath: String,
+        password: String,
+        backend: String = "local",
+        backendUrl: String = "",
+        backendUser: String = "",
+        backendPass: String = ""
+    ): Map<String, String> {
+        val env = HashMap(System.getenv() ?: emptyMap())
+        env["RESTIC_REPOSITORY"] = buildRepoUrl(backend, repoPath, backendUrl)
+        env["RESTIC_PASSWORD"] = password
+        if (backend != "local") {
+            env.putAll(buildRcloneEnv(backend, backendUrl, backendUser, backendPass))
+        }
+        return env
+    }
+
+    /** Build the restic repository URL based on backend config. */
+    fun buildRepoUrl(backend: String, repoPath: String, backendUrl: String): String {
+        return if (backend == "local") repoPath
+        else "rclone:myremote:$repoPath"
+    }
+
+    /** Build RCLONE_CONFIG_* environment variables for restic's built-in rclone backend. */
+    private fun buildRcloneEnv(
+        backend: String,
+        url: String,
+        user: String,
+        pass: String
+    ): Map<String, String> {
+        val env = HashMap<String, String>()
+        when (backend) {
+            "webdav" -> {
+                env["RCLONE_CONFIG_MYREMOTE_TYPE"] = "webdav"
+                env["RCLONE_CONFIG_MYREMOTE_URL"] = url.trimEnd('/')
+                env["RCLONE_CONFIG_MYREMOTE_VENDOR"] = "other"
+                if (user.isNotBlank()) env["RCLONE_CONFIG_MYREMOTE_USER"] = user
+                if (pass.isNotBlank()) env["RCLONE_CONFIG_MYREMOTE_PASS"] = pass
+            }
+            "smb" -> {
+                env["RCLONE_CONFIG_MYREMOTE_TYPE"] = "smb"
+                env["RCLONE_CONFIG_MYREMOTE_HOST"] = url
+                if (user.isNotBlank()) env["RCLONE_CONFIG_MYREMOTE_USER"] = user
+                if (pass.isNotBlank()) env["RCLONE_CONFIG_MYREMOTE_PASS"] = pass
+            }
+        }
+        return env
+    }
+
+    data class CommandResult(
+        val stdout: String,
+        val stderr: String,
+        val exitCode: Int
+    )
+
+    /** Run restic and capture full output. */
+    private fun runRestic(env: Map<String, String>, args: List<String>): CommandResult {
+        return try {
+            val cmdArgs = buildCommandArgs(args)
+            val pb = ProcessBuilder(cmdArgs)
+            pb.environment().putAll(env)
+            pb.redirectErrorStream(false)
+            val process = pb.start()
+
+            // Drain stderr in background to prevent pipe-buffer deadlock
+            val stderrText = StringBuilder()
+            val stderrThread = Thread({
+                try {
+                    process.errorStream.bufferedReader().use { reader ->
+                        var line: String?
+                        while (reader.readLine().also { line = it } != null) {
+                            stderrText.appendLine(line)
+                        }
+                    }
+                } catch (_: Exception) {}
+            }, "restic-stderr").apply { isDaemon = true; start() }
+
+            val stdout = process.inputStream.bufferedReader().use(BufferedReader::readText)
+            stderrThread.join(5000)
+            val exitCode = process.waitFor()
+            CommandResult(stdout.trim(), stderrText.toString().trim(), exitCode)
+        } catch (e: Exception) {
+            CommandResult("", e.message ?: "Unknown error", -1)
+        }
+    }
+
+    /** Run restic with single-string args (no spaces in args). */
+    private fun runRestic(env: Map<String, String>, vararg args: String): CommandResult {
+        return runRestic(env, args.toList())
+    }
+
+    /** Run restic, calling onLine for each stdout line (for streaming progress). */
+    private suspend fun runResticStreaming(
+        env: Map<String, String>,
+        args: List<String>,
+        onLine: suspend (String) -> Unit
+    ): CommandResult = withContext(Dispatchers.IO) {
+        try {
+            val cmdArgs = buildCommandArgs(args)
+            val pb = ProcessBuilder(cmdArgs)
+            pb.environment().putAll(env)
+            pb.redirectErrorStream(false)
+            val process = pb.start()
+
+            val stdoutLines = StringBuilder()
+            val reader = BufferedReader(InputStreamReader(process.inputStream))
+            val stderrReader = BufferedReader(InputStreamReader(process.errorStream))
+
+            // Drain stderr in background
+            val stderrText = StringBuilder()
+            val stderrThread = Thread({
+                try { stderrReader.use { stderrText.append(it.readText()) } } catch (_: Exception) {}
+            }, "restic-stderr").apply { isDaemon = true; start() }
+
+            var line: String?
+            while (reader.readLine().also { line = it } != null) {
+                if (!coroutineContext.isActive) {
+                    process.destroy()
+                    break
+                }
+                val l = line!!
+                stdoutLines.appendLine(l)
+                onLine(l)
+            }
+
+            stderrThread.join(5000)
+            val exitCode = try { process.waitFor() } catch (_: Exception) { -1 }
+            reader.close()
+
+            CommandResult(stdoutLines.toString().trim(), stderrText.toString().trim(), exitCode)
+        } catch (e: Exception) {
+            CommandResult("", e.message ?: "Unknown error", -1)
+        }
+    }
+
+    /** Parse the JSON summary from the end of restic backup output. */
+    private fun parseBackupSummary(stdout: String): Result<BackupSummary> {
+        // The summary is the last JSON object in the output (after status lines)
+        val lines = stdout.lines()
+        for (i in lines.indices.reversed()) {
+            val line = lines[i].trim()
+            if (!line.startsWith("{")) continue
+            try {
+                val json = JSONObject(line)
+                if (json.optString("message_type", "") == "summary") {
+                    return Result.success(BackupSummary(
+                        snapshotId = json.optString("snapshot_id", ""),
+                        filesNew = json.optInt("files_new", 0),
+                        filesChanged = json.optInt("files_changed", 0),
+                        filesUnmodified = json.optInt("files_unmodified", 0),
+                        dirsNew = json.optInt("dirs_new", 0),
+                        dirsChanged = json.optInt("dirs_changed", 0),
+                        dirsUnmodified = json.optInt("dirs_unmodified", 0),
+                        dataBlobs = json.optInt("data_blobs", 0),
+                        treeBlobs = json.optInt("tree_blobs", 0),
+                        dataAdded = json.optLong("data_added", 0),
+                        totalFilesProcessed = json.optInt("total_files_processed", 0),
+                        totalBytesProcessed = json.optLong("total_bytes_processed", 0),
+                        totalDuration = json.optDouble("total_duration", 0.0)
+                    ))
+                }
+            } catch (_: Exception) { /* not a valid summary JSON, keep looking */ }
+        }
+        return Result.failure(Exception("No summary found in restic output"))
+    }
+}
diff --git a/app/src/main/java/com/example/androidbackupgui/backup/RestoreOperation.kt b/app/src/main/java/com/example/androidbackupgui/backup/RestoreOperation.kt
new file mode 100644
index 0000000..d26236d
--- /dev/null
+++ b/app/src/main/java/com/example/androidbackupgui/backup/RestoreOperation.kt
@@ -0,0 +1,276 @@
+package com.example.androidbackupgui.backup
+import com.example.androidbackupgui.root.RootShell
+import com.example.androidbackupgui.root.shellEscape
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.isActive
+import kotlinx.coroutines.withContext
+import java.io.File
+import kotlin.coroutines.coroutineContext
+
+/**
+ * Performs restore of backed-up apps using root shell.
+ * Mirrors the logic from backup_script's modules/restore.sh.
+ */
+object RestoreOperation {
+
+    data class RestoreProgress(
+        val current: Int,
+        val total: Int,
+        val packageName: String,
+        val stage: String,    // "install", "data", "obb", "ssaid", "permissions", "done"
+        val message: String
+    )
+
+    data class RestoreResult(
+        val successCount: Int,
+        val failCount: Int,
+        val elapsedMs: Long
+    )
+
+    /**
+     * Restore apps from a backup directory.
+     * @param filterPkgs if non-null, only restore packages in this set
+     */
+    suspend fun restoreApps(
+        backupDir: File,
+        userId: String = "0",
+        filterPkgs: Set<String>? = null,
+        onProgress: suspend (RestoreProgress) -> Unit = {}
+    ): RestoreResult = withContext(Dispatchers.IO) {
+        val emit: suspend (RestoreProgress) -> Unit = { p -> withContext(Dispatchers.Main) { onProgress(p) } }
+        val startTime = System.currentTimeMillis()
+
+        // Read app list from backup
+        val appListFile = File(backupDir, "appList.txt")
+        val allPackages = if (appListFile.exists()) {
+            appListFile.readLines()
+                .map { it.trim() }
+                .filter { it.isNotEmpty() && !it.startsWith("#") }
+        } else {
+            // Fallback: scan subdirectories
+            backupDir.listFiles()
+                ?.filter { it.isDirectory && File(it, "${it.name}.apk").exists() }
+                ?.map { it.name }
+                ?: emptyList()
+        }
+
+        val packages = if (filterPkgs != null) {
+            allPackages.filter { it in filterPkgs }
+        } else {
+            allPackages
+        }
+
+        var success = 0
+        var fail = 0
+
+        for ((index, pkg) in packages.withIndex()) {
+            if (!coroutineContext.isActive) break
+
+            val appBackupDir = File(backupDir, pkg)
+            if (!appBackupDir.exists()) {
+                fail++
+                continue
+            }
+
+            // 1. Install APK
+            emit(RestoreProgress(index + 1, packages.size, pkg, "install", "正在安裝 APK…"))
+            val installed = installApk(appBackupDir)
+
+            if (!installed) {
+                fail++
+                emit(RestoreProgress(index + 1, packages.size, pkg, "done", "安裝失敗"))
+                continue
+            }
+
+            // 2. Stop the app before restoring data
+            RootShell.exec("am force-stop '${pkg.shellEscape()}'")
+
+            // 3. Restore data
+            emit(RestoreProgress(index + 1, packages.size, pkg, "data", "正在恢復數據…"))
+            restoreData(appBackupDir)
+
+            // 4. Restore OBB
+            emit(RestoreProgress(index + 1, packages.size, pkg, "obb", "正在恢復 OBB…"))
+            restoreObb(pkg, appBackupDir)
+
+            // 5. Restore SSAID
+            emit(RestoreProgress(index + 1, packages.size, pkg, "ssaid", "正在恢復 SSAID…"))
+            restoreSsaid(pkg, appBackupDir, userId)
+
+            // 6. Restore permissions
+            emit(RestoreProgress(index + 1, packages.size, pkg, "permissions", "正在恢復權限…"))
+            restorePermissions(pkg, appBackupDir)
+
+            // 7. Fix data ownership and SELinux
+            fixDataOwnership(pkg, userId)
+
+            success++
+            emit(RestoreProgress(index + 1, packages.size, pkg, "done", "完成"))
+        }
+
+        val elapsed = System.currentTimeMillis() - startTime
+        RestoreResult(success, fail, elapsed)
+    }
+
+    private fun installApk(appDir: File): Boolean {
+        // Find APK files
+        val apkFiles = appDir.listFiles()
+            ?.filter { it.name.endsWith(".apk") }
+            ?.sortedBy { it.name } // main APK first, splits after
+            ?: return false
+
+        if (apkFiles.isEmpty()) return false
+
+        // Build install command for multiple APKs (split APK support)
+        val apkPaths = apkFiles.joinToString(" ") { "'${it.absolutePath.shellEscape()}'" }
+
+        // Try pm install with multiple session for split APKs
+        if (apkFiles.size > 1) {
+            val result = RootShell.exec("pm install-create -r -t 2>/dev/null")
+            val sessionId = result.output.lines()
+                .firstOrNull { it.contains("Success") }
+                ?.substringAfter("[")
+                ?.substringBefore("]")
+
+            if (sessionId != null) {
+                for ((i, apk) in apkFiles.withIndex()) {
+                    val sessionName = if (i == 0) "base.apk" else "split_${i}.apk"
+                    RootShell.exec("pm install-write '${sessionId.shellEscape()}' '$sessionName' '${apk.absolutePath.shellEscape()}'")
+                }
+                val commit = RootShell.exec("pm install-commit '${sessionId.shellEscape()}'")
+                return commit.isSuccess
+            }
+        }
+
+        // Single APK install
+        val result = RootShell.exec("pm install -r -t $apkPaths")
+        return result.isSuccess
+    }
+
+    private fun restoreData(appDir: File) {
+
+        // Find data archive
+        val dataFiles = appDir.listFiles()
+            ?.filter { it.name.contains("_data.tar") }
+            ?: return
+
+        for (archive in dataFiles) {
+            val archivePath = archive.absolutePath.shellEscape()
+            // Verify archive doesn't contain path traversal before extracting
+            if (!isArchiveSafe(archive)) continue
+            when {
+                archive.name.endsWith(".zst") -> {
+                    RootShell.exec("zstd -d -c '$archivePath' | tar -xf - -C / 2>/dev/null")
+                }
+                archive.name.endsWith(".gz") -> {
+                    RootShell.exec("tar -xzf '$archivePath' -C / 2>/dev/null")
+                }
+                archive.name.endsWith(".tar") -> {
+                    RootShell.exec("tar -xf '$archivePath' -C / 2>/dev/null")
+                }
+            }
+        }
+    }
+
+    /**
+     * Check that a tar archive contains no path traversal (..) entries,
+     * absolute paths, or symbolic links pointing outside the tree.
+     */
+    private fun isArchiveSafe(archive: File): Boolean {
+        val listCmd = if (archive.name.endsWith(".zst")) {
+            "zstd -d -c '${archive.absolutePath.shellEscape()}' | tar tf - 2>/dev/null"
+        } else {
+            "tar tf '${archive.absolutePath.shellEscape()}' 2>/dev/null"
+        }
+        val result = RootShell.exec(listCmd)
+        if (!result.isSuccess) return false
+        return !result.output.lines().any { line ->
+            line.contains("..") ||
+            line.startsWith("/") ||
+            (line.contains(" -> ") && line.substringAfter(" -> ").startsWith("/"))
+        }
+    }
+
+    private fun restoreObb(packageName: String, appDir: File) {
+        val obbFiles = appDir.listFiles()
+            ?.filter { it.name.contains("_obb.tar") }
+            ?: return
+
+        for (archive in obbFiles) {
+            if (!isArchiveSafe(archive)) continue
+            val archivePath = archive.absolutePath.shellEscape()
+            when {
+                archive.name.endsWith(".zst") -> {
+                    RootShell.exec("zstd -d -c '$archivePath' | tar -xf - -C / 2>/dev/null")
+                }
+                archive.name.endsWith(".gz") -> {
+                    RootShell.exec("tar -xzf '$archivePath' -C / 2>/dev/null")
+                }
+                archive.name.endsWith(".tar") -> {
+                    RootShell.exec("tar -xf '$archivePath' -C / 2>/dev/null")
+                }
+            }
+        }
+
+        // Fix OBB permissions
+        RootShell.exec("chown -R 1023:1023 /storage/emulated/0/Android/obb/${packageName.shellEscape()}/ 2>/dev/null")
+    }
+
+    private fun restoreSsaid(packageName: String, appDir: File, userId: String) {
+        val ssaidFile = File(appDir, "ssaid.txt")
+        if (!ssaidFile.exists()) return
+
+        val ssaidLine = ssaidFile.readText().trim()
+        if (ssaidLine.isBlank()) return
+
+        val targetFile = "/data/system/users/${userId.shellEscape()}/settings_ssaid.xml"
+        val pkgEsc = packageName.shellEscape()
+        val ssaidEsc = ssaidLine.shellEscape()
+
+        // Remove existing entry for this package, insert new one before </settings>
+        RootShell.exec(
+            "grep -v '${pkgEsc}' '$targetFile' > '$targetFile.tmp' && " +
+            "sed -i '\$ i ${ssaidEsc}' '$targetFile.tmp' && " +
+            "mv '$targetFile.tmp' '$targetFile'"
+        )
+    }
+
+    private fun restorePermissions(packageName: String, appDir: File) {
+        val permFile = File(appDir, "permissions.txt")
+        if (!permFile.exists()) return
+
+        val perms = permFile.readLines()
+            .filter { it.contains("granted=true") }
+            .mapNotNull { line ->
+                // Extract permission name from dumpsys output
+                val perm = line.substringBefore(":")
+                    .trim()
+                    .takeIf { it.startsWith("android.permission.") }
+                perm
+            }
+
+        val pkgEsc = packageName.shellEscape()
+        for (perm in perms) {
+            RootShell.exec("pm grant '$pkgEsc' '${perm.shellEscape()}' 2>/dev/null")
+        }
+    }
+
+    private fun fixDataOwnership(packageName: String, userId: String) {
+        val pkgEsc = packageName.shellEscape()
+        val uidEsc = userId.shellEscape()
+        val uidResult = RootShell.exec("dumpsys package '$pkgEsc' | grep 'userId=' | head -1")
+        val uid = uidResult.output
+            .substringAfter("userId=", "")
+            .substringBefore(" ")
+            .substringBefore(",")
+            .trim()
+            .toIntOrNull()
+
+        if (uid != null) {
+            RootShell.exec("chown -R $uid:$uid /data/data/$pkgEsc/ 2>/dev/null")
+            RootShell.exec("chown -R $uid:$uid /data/user_de/$uidEsc/$pkgEsc/ 2>/dev/null")
+            RootShell.exec("restorecon -R /data/data/$pkgEsc/ 2>/dev/null")
+            RootShell.exec("restorecon -R /data/user_de/$uidEsc/$pkgEsc/ 2>/dev/null")
+        }
+    }
+}
diff --git a/app/src/main/java/com/example/androidbackupgui/backup/WifiManager.kt b/app/src/main/java/com/example/androidbackupgui/backup/WifiManager.kt
new file mode 100644
index 0000000..74b195a
--- /dev/null
+++ b/app/src/main/java/com/example/androidbackupgui/backup/WifiManager.kt
@@ -0,0 +1,77 @@
+package com.example.androidbackupgui.backup
+
+import com.example.androidbackupgui.root.RootShell
+import com.example.androidbackupgui.root.shellEscape
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import java.io.File
+
+/**
+ * Backup and restore WiFi configuration.
+ * Mirrors backup_script WiFi backup/restore logic.
+ */
+object WifiManager {
+
+    // Possible WiFi config paths on different Android versions
+    private val WIFI_PATHS = listOf(
+        "/data/misc/apexdata/com.android.wifi/WifiConfigStore.xml",
+        "/data/misc/wifi/WifiConfigStore.xml",
+        "/data/misc/wifi/wpa_supplicant.conf",
+        "/data/vendor/wifi/wpa/wpa_supplicant.conf"
+    )
+
+    /**
+     * Find the active WiFi config file path. Public for use by BackupOperation.
+     */
+    fun findWifiConfigPath(): String? {
+        for (path in WIFI_PATHS) {
+            val result = RootShell.exec("test -f '$path' && echo 'FOUND'")
+            if (result.output.contains("FOUND")) return path
+        }
+        return null
+    }
+
+    /**
+     * Backup WiFi configuration to a file.
+     * @return the backup file path, or null on failure.
+     */
+    suspend fun backup(outputDir: File): File? = withContext(Dispatchers.IO) {
+        val wifiSource = findWifiConfigPath() ?: return@withContext null
+        val wifiDest = File(outputDir, "WifiConfigStore.xml")
+
+        val result = RootShell.exec("cp '$wifiSource' '${wifiDest.absolutePath.shellEscape()}'")
+        if (result.isSuccess) wifiDest else null
+    }
+
+    /**
+     * Restore WiFi configuration from a backup file.
+     * @return true on success.
+     */
+    suspend fun restore(backupDir: File): Boolean = withContext(Dispatchers.IO) {
+        val backupFile = File(backupDir, "WifiConfigStore.xml")
+        if (!backupFile.exists()) return@withContext false
+
+        val backupPath = backupFile.absolutePath.shellEscape()
+        val wifiTarget = findWifiConfigPath()
+        if (wifiTarget == null) {
+            // Try the most common path
+            val fallback = "/data/misc/apexdata/com.android.wifi/WifiConfigStore.xml"
+            val parent = File(fallback).parentFile?.absolutePath?.shellEscape() ?: return@withContext false
+            RootShell.exec("mkdir -p '$parent'")
+            val result = RootShell.exec("cp '$backupPath' '$fallback'")
+            if (!result.isSuccess) return@withContext false
+            RootShell.exec("chown system:wifi '$fallback'")
+            RootShell.exec("chmod 0660 '$fallback'")
+        } else {
+            val result = RootShell.exec("cp '$backupPath' '$wifiTarget'")
+            if (!result.isSuccess) return@withContext false
+            RootShell.exec("chown system:wifi '$wifiTarget'")
+            RootShell.exec("chmod 0660 '$wifiTarget'")
+        }
+
+        // WiFi backup only takes effect after reboot, but we can try reloading
+        RootShell.exec("svc wifi disable 2>/dev/null")
+        RootShell.exec("svc wifi enable 2>/dev/null")
+        true
+    }
+}
diff --git a/app/src/main/java/com/example/androidbackupgui/root/RootShell.kt b/app/src/main/java/com/example/androidbackupgui/root/RootShell.kt
new file mode 100644
index 0000000..04d3d37
--- /dev/null
+++ b/app/src/main/java/com/example/androidbackupgui/root/RootShell.kt
@@ -0,0 +1,177 @@
+package com.example.androidbackupgui.root
+
+import kotlinx.coroutines.*
+import java.io.BufferedReader
+import java.io.InputStreamReader
+import java.io.OutputStreamWriter
+import java.io.InputStream
+
+/**
+ * Escape a string for safe use inside single-quoted shell strings.
+ * Replaces each ' with '\'' (end quote, escaped quote, restart quote).
+ */
+fun String.shellEscape(): String = this.replace("'", "'\\''")
+
+/**
+ * Persistent root shell session via `su`.
+ * Manages a single su process and executes commands sequentially.
+ */
+object RootShell {
+
+    private var process: Process? = null
+    private var writer: OutputStreamWriter? = null
+    private var reader: BufferedReader? = null
+    private var errReader: BufferedReader? = null
+    private val lock = Any()
+
+    /** Result of a shell command execution. */
+    data class ShellResult(
+        val output: String,
+        val error: String,
+        val exitCode: Int
+    ) {
+        val isSuccess get() = exitCode == 0
+    }
+
+    /** Ensure a root shell is open. Returns true if root is available. */
+    fun ensureSession(): Boolean = synchronized(lock) {
+        if (isAlive()) return true
+        return try {
+            val p = Runtime.getRuntime().exec(arrayOf("su"))
+            writer = OutputStreamWriter(p.outputStream)
+            reader = BufferedReader(InputStreamReader(p.inputStream))
+            errReader = BufferedReader(InputStreamReader(p.errorStream))
+            process = p
+            // Drain stderr in background to prevent pipe-buffer deadlock
+            Thread({
+                try { while (errReader?.readLine() != null) {} } catch (_: Exception) {}
+            }, "su-stderr-drain").apply { isDaemon = true }.start()
+            // Consume the initial (possibly empty) output
+            exec("echo ROOT_OK").output.contains("ROOT_OK")
+        } catch (_: Exception) {
+            false
+        }
+    }
+
+    fun isAlive(): Boolean = synchronized(lock) {
+        process?.isAlive == true
+    }
+
+    fun close() = synchronized(lock) {
+        try { writer?.close() } catch (_: Exception) {}
+        try { reader?.close() } catch (_: Exception) {}
+        try { errReader?.close() } catch (_: Exception) {}
+        try { process?.destroy() } catch (_: Exception) {}
+        process = null
+        writer = null
+        reader = null
+        errReader = null
+    }
+
+    /**
+     * Execute a command and return the output.
+     * Uses a sentinel delimiter to identify end of output.
+     */
+    fun exec(command: String): ShellResult = synchronized(lock) {
+        if (!isAlive() && !ensureSession()) {
+            return ShellResult("", "No root access", -1)
+        }
+
+        val sentinel = "EXIT_${System.nanoTime()}"
+        val fullCmd = "$command; echo $sentinel \$?"
+
+        writer?.write("$fullCmd\n")
+        writer?.flush()
+
+        val output = StringBuilder()
+        val error = StringBuilder()
+        var line: String?
+
+        while (reader?.readLine().also { line = it } != null) {
+            val l = line!!
+            if (l.startsWith(sentinel)) {
+                val code = l.removePrefix("$sentinel ").trim().toIntOrNull() ?: -1
+                return@exec ShellResult(
+                    output = output.toString().trimEnd(),
+                    error = error.toString().trimEnd(),
+                    exitCode = code
+                )
+            }
+            output.appendLine(l)
+        }
+
+        ShellResult(output.toString().trimEnd(), error.toString().trimEnd(), -1)
+    }
+
+    /**
+     * Execute command in coroutine context on Dispatchers.IO.
+     */
+    suspend fun execAsync(command: String): ShellResult =
+        withContext(Dispatchers.IO) { exec(command) }
+
+    /**
+     * Stream output line by line. Returns exit code.
+     */
+    suspend fun execStreaming(
+        command: String,
+        onLine: suspend (String) -> Unit
+    ): Int = withContext(Dispatchers.IO) {
+        val lines = mutableListOf<String>()
+        var exitCode = -1
+        synchronized(lock) {
+            if (!isAlive() && !ensureSession()) return@withContext -1
+
+            val sentinel = "EXIT_${System.nanoTime()}"
+            val fullCmd = "$command; echo $sentinel \$?"
+
+            writer?.write("$fullCmd\n")
+            writer?.flush()
+
+            var line: String?
+            while (reader?.readLine().also { line = it } != null) {
+                val l = line!!
+                if (l.startsWith(sentinel)) {
+                    exitCode = l.removePrefix("$sentinel ").trim().toIntOrNull() ?: -1
+                    break
+                }
+                lines.add(l)
+            }
+        }
+        for (l in lines) {
+            onLine(l)
+        }
+        exitCode
+    }
+    /**
+     * Execute a command via `su` and return the stdout as an InputStream
+     * for binary-safe streaming. Caller MUST close the stream and call
+     * waitForStreamResult() or destroy the returned process.
+     */
+    class StreamProcess(
+        val process: Process,
+        val inputStream: InputStream,
+        private val command: String
+    ) {
+        fun waitFor(): Int {
+            try { process.waitFor() } catch (_: Exception) {}
+            return process.exitValue()
+        }
+        fun destroy() {
+            try { process.destroy() } catch (_: Exception) {}
+            try { inputStream.close() } catch (_: Exception) {}
+        }
+    }
+
+    fun execBinary(command: String): StreamProcess? {
+        return try {
+            val p = Runtime.getRuntime().exec(arrayOf("su", "-c", command))
+            // Drain stderr to prevent pipe deadlock
+            Thread({
+                try { p.errorStream.use { it.readBytes() } } catch (_: Exception) {}
+            }, "su-binary-stderr").apply { isDaemon = true }.start()
+            StreamProcess(p, p.inputStream, command)
+        } catch (_: Exception) {
+            null
+        }
+    }
+}
diff --git a/app/src/main/java/com/example/androidbackupgui/ui/BackupFragment.kt b/app/src/main/java/com/example/androidbackupgui/ui/BackupFragment.kt
new file mode 100644
index 0000000..2c9e695
--- /dev/null
+++ b/app/src/main/java/com/example/androidbackupgui/ui/BackupFragment.kt
@@ -0,0 +1,224 @@
+package com.example.androidbackupgui.ui
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.CheckBox
+import android.widget.LinearLayout
+import android.widget.TextView
+import com.google.android.material.card.MaterialCardView
+import com.google.android.material.color.MaterialColors
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.lifecycleScope
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import com.example.androidbackupgui.R
+import com.example.androidbackupgui.backup.AppInfo
+import com.example.androidbackupgui.backup.AppScanner
+import com.example.androidbackupgui.backup.BackupConfig
+import com.example.androidbackupgui.backup.BackupOperation
+import com.example.androidbackupgui.backup.ResticBinary
+import com.example.androidbackupgui.backup.ResticWrapper
+import com.example.androidbackupgui.backup.WifiManager
+import com.example.androidbackupgui.databinding.FragmentBackupBinding
+import kotlinx.coroutines.launch
+import java.io.File
+
+class BackupFragment : Fragment() {
+
+    private var _binding: FragmentBackupBinding? = null
+    private val binding get() = _binding!!
+    private var apps: List<AppInfo> = emptyList()
+    private var selectedApps = mutableSetOf<String>()
+    private lateinit var config: BackupConfig
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?
+    ): View {
+        _binding = FragmentBackupBinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        val configFile = File(requireContext().filesDir, "backup_settings.conf")
+        config = BackupConfig.fromFile(configFile)
+
+        binding.appList.layoutManager = LinearLayoutManager(requireContext())
+
+        binding.scanButton.setOnClickListener { scanApps() }
+        binding.backupButton.setOnClickListener { startBackup() }
+    }
+
+    private fun scanApps() {
+        binding.backupButton.isEnabled = false
+        setRunning(true)
+        binding.statusText.text = "正在掃描應用…"
+
+        viewLifecycleOwner.lifecycleScope.launch {
+            val thirdParty = AppScanner.scanThirdParty()
+            val system = AppScanner.scanSystem(config)
+            apps = thirdParty + system
+            selectedApps.clear()
+            selectedApps.addAll(apps.map { it.packageName })
+
+            binding.statusText.text = "共找到 ${apps.size} 個應用，全部已選中"
+            binding.backupButton.isEnabled = apps.isNotEmpty()
+            setRunning(false)
+
+            setupAppList()
+        }
+    }
+
+    private fun setupAppList() {
+        binding.appList.adapter = AppAdapter(apps, selectedApps) { pkg, checked ->
+            if (checked) selectedApps.add(pkg) else selectedApps.remove(pkg)
+            binding.statusText.text = "已選擇 ${selectedApps.size}/${apps.size} 個應用"
+        }
+    }
+
+    private fun startBackup() {
+        val toBackup = apps.filter { it.packageName in selectedApps }
+        if (toBackup.isEmpty()) return
+
+        setRunning(true)
+        binding.backupButton.isEnabled = false
+        binding.scanButton.isEnabled = false
+
+        viewLifecycleOwner.lifecycleScope.launch {
+            val outputDir = File(config.outputPath.ifEmpty {
+                requireContext().filesDir.absolutePath
+            })
+            WifiManager.backup(outputDir)
+            val result = BackupOperation.backupApps(
+                apps = toBackup,
+                config = config,
+                outputDir = outputDir,
+                onProgress = { progress ->
+                    binding.statusText.text =
+                        "[${progress.current}/${progress.total}] ${progress.packageName}: ${progress.message}"
+                }
+            )
+
+            // If restic is enabled, snapshot the backup to a restic repository
+            var resticSummary: ResticWrapper.BackupSummary? = null
+            if (config.resticEnabled == 1 && config.resticRepo.isNotBlank()) {
+                val binaryPath = ResticBinary.prepare(requireContext())
+                if (binaryPath != null) {
+                    ResticWrapper.binaryPath = binaryPath
+                    binding.statusText.text = "正在寫入 restic 去重倉庫…"
+                    val resticResult = ResticWrapper.backup(
+                        repoPath = config.resticRepo,
+                        password = config.resticPassword,
+                        paths = listOf(result.outputDir),
+                        tags = listOf("backup_${System.currentTimeMillis() / 1000}"),
+                        hostname = "android-backup-gui",
+                        backend = config.resticBackend,
+                        backendUrl = config.resticBackendUrl,
+                        backendUser = config.resticBackendUser,
+                        backendPass = config.resticBackendPass,
+                        onProgress = { progress ->
+                            if (progress.messageType == "status") {
+                                binding.statusText.text = "restic: %.0f%% (%d/%d files)".format(
+                                    progress.percentDone * 100,
+                                    progress.filesDone,
+                                    progress.totalFiles
+                                )
+                            }
+                        }
+                    )
+                    resticResult.fold(
+                        onSuccess = { resticSummary = it },
+                        onFailure = { e ->
+                            binding.statusText.text = "restic 快照失敗: ${e.message}"
+                        }
+                    )
+                }
+            }
+
+            binding.statusText.text = buildString {
+                appendLine("備份完成！")
+                appendLine("成功: ${result.successCount}  失敗: ${result.failCount}")
+                appendLine("耗時: ${result.elapsedMs / 1000}秒")
+                appendLine("輸出: ${result.outputDir}")
+                if (resticSummary != null) {
+                    appendLine()
+                    appendLine("── Restic 快照 ──")
+                    appendLine("ID: ${resticSummary!!.snapshotId.take(8)}…")
+                    appendLine("新增: ${resticSummary!!.dataAdded / 1024 / 1024} MB")
+                    appendLine("檔案: ${resticSummary!!.totalFilesProcessed}")
+                }
+            }
+            setRunning(false)
+            binding.scanButton.isEnabled = true
+        }
+    }
+
+    private fun setRunning(running: Boolean) {
+        binding.progressBar.visibility = if (running) View.VISIBLE else View.GONE
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }
+
+    /** Simple RecyclerView adapter for app list with checkboxes. */
+    private class AppAdapter(
+        private val apps: List<AppInfo>,
+        private val selected: Set<String>,
+        private val onToggle: (String, Boolean) -> Unit
+    ) : RecyclerView.Adapter<AppAdapter.ViewHolder>() {
+
+        class ViewHolder(view: View) : RecyclerView.ViewHolder(view) {
+            val checkbox: CheckBox = view.findViewById(R.id.checkbox)
+            val textView: TextView = view.findViewById(R.id.appName)
+        }
+
+        override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
+            val ctx = parent.context
+            val card = MaterialCardView(ctx).apply {
+                layoutParams = ViewGroup.MarginLayoutParams(
+                    ViewGroup.LayoutParams.MATCH_PARENT,
+                    ViewGroup.LayoutParams.WRAP_CONTENT
+                ).apply { setMargins(0, 0, 0, 8) }
+                radius = 12f
+                cardElevation = 0f
+                strokeWidth = 0
+                setCardBackgroundColor(
+                    MaterialColors.getColor(ctx, com.google.android.material.R.attr.colorSurfaceContainer, 0)
+                )
+            }
+            val layout = LinearLayout(ctx).apply {
+                orientation = LinearLayout.HORIZONTAL
+                setPadding(16, 12, 16, 12)
+            }
+            val cb = CheckBox(ctx).apply { id = R.id.checkbox }
+            val tv = TextView(ctx).apply {
+                id = R.id.appName
+                setPadding(16, 0, 0, 0)
+                textSize = 15f
+                setTextColor(
+                    MaterialColors.getColor(ctx, com.google.android.material.R.attr.colorOnSurface, 0)
+                )
+            }
+            layout.addView(cb)
+            layout.addView(tv)
+            card.addView(layout)
+            return ViewHolder(card)
+        }
+
+        override fun onBindViewHolder(holder: ViewHolder, position: Int) {
+            val app = apps[position]
+            holder.textView.text = app.packageName
+            holder.checkbox.isChecked = app.packageName in selected
+            holder.checkbox.setOnCheckedChangeListener { _, checked ->
+                onToggle(app.packageName, checked)
+            }
+        }
+
+        override fun getItemCount() = apps.size
+    }
+}
diff --git a/app/src/main/java/com/example/androidbackupgui/ui/ConfigFragment.kt b/app/src/main/java/com/example/androidbackupgui/ui/ConfigFragment.kt
new file mode 100644
index 0000000..4fb89fc
--- /dev/null
+++ b/app/src/main/java/com/example/androidbackupgui/ui/ConfigFragment.kt
@@ -0,0 +1,286 @@
+package com.example.androidbackupgui.ui
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.lifecycleScope
+import com.example.androidbackupgui.R
+import com.example.androidbackupgui.backup.BackupConfig
+import com.example.androidbackupgui.backup.ResticBinary
+import com.example.androidbackupgui.backup.ResticWrapper
+import com.example.androidbackupgui.databinding.FragmentConfigBinding
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import java.io.File
+
+class ConfigFragment : Fragment() {
+
+    private var _binding: FragmentConfigBinding? = null
+    private val binding get() = _binding!!
+    private lateinit var config: BackupConfig
+    private lateinit var configFile: File
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?
+    ): View {
+        _binding = FragmentConfigBinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        configFile = File(requireContext().filesDir, "backup_settings.conf")
+        config = BackupConfig.fromFile(configFile)
+        loadConfig()
+
+        binding.saveConfigButton.setOnClickListener { saveConfig() }
+        binding.resticBackendGroup.addOnButtonCheckedListener { _, _, _ -> updateBackendFieldVisibility() }
+        binding.initResticButton.setOnClickListener { initResticRepo() }
+        binding.resticStatsButton.setOnClickListener { showResticStats() }
+        binding.resticPruneButton.setOnClickListener { pruneResticSnapshots() }
+    }
+
+    private fun loadConfig() {
+        binding.backupModeSwitch.isChecked = config.backupMode == 1
+        binding.backupUserDataSwitch.isChecked = config.backupUserData == 1
+        binding.backupObbSwitch.isChecked = config.backupObbData == 1
+        binding.backupWifiSwitch.isChecked = config.backupWifi == 1
+        binding.ignoreRunningSwitch.isChecked = config.backgroundAppsIgnore == 1
+        binding.outputPathEdit.setText(config.outputPath)
+        binding.compressionEdit.setText(config.compressionMethod)
+
+        // Restic settings
+        binding.resticEnabledSwitch.isChecked = config.resticEnabled == 1
+        binding.resticRepoEdit.setText(config.resticRepo)
+        binding.resticPasswordEdit.setText(config.resticPassword)
+        binding.resticBackendUrlEdit.setText(config.resticBackendUrl)
+        binding.resticBackendUserEdit.setText(config.resticBackendUser)
+        binding.resticBackendPassEdit.setText(config.resticBackendPass)
+
+        // Restore backend selector
+        binding.resticBackendGroup.check(
+            when (config.resticBackend) {
+                "webdav" -> R.id.resticBackendWebdav
+                "smb" -> R.id.resticBackendSmb
+                else -> R.id.resticBackendLocal
+            }
+        )
+        updateBackendFieldVisibility()
+        updateComputedUrl()
+        refreshResticStatus()
+    }
+
+    private fun saveConfig() {
+        config.backupMode = if (binding.backupModeSwitch.isChecked) 1 else 0
+        config.backupUserData = if (binding.backupUserDataSwitch.isChecked) 1 else 0
+        config.backupObbData = if (binding.backupObbSwitch.isChecked) 1 else 0
+        config.backgroundAppsIgnore = if (binding.ignoreRunningSwitch.isChecked) 1 else 0
+        config.outputPath = binding.outputPathEdit.text?.toString() ?: ""
+        config.compressionMethod = binding.compressionEdit.text?.toString()?.ifEmpty { "zstd" } ?: "zstd"
+        config.backupWifi = if (binding.backupWifiSwitch.isChecked) 1 else 0
+
+        // Restic settings
+        config.resticEnabled = if (binding.resticEnabledSwitch.isChecked) 1 else 0
+        config.resticRepo = binding.resticRepoEdit.text?.toString()?.trim() ?: ""
+        config.resticPassword = binding.resticPasswordEdit.text?.toString() ?: ""
+        config.resticBackend = when (binding.resticBackendGroup.checkedButtonId) {
+            R.id.resticBackendWebdav -> "webdav"
+            R.id.resticBackendSmb -> "smb"
+            else -> "local"
+        }
+        config.resticBackendUrl = binding.resticBackendUrlEdit.text?.toString()?.trim() ?: ""
+        config.resticBackendUser = binding.resticBackendUserEdit.text?.toString()?.trim() ?: ""
+        config.resticBackendPass = binding.resticBackendPassEdit.text?.toString() ?: ""
+
+        viewLifecycleOwner.lifecycleScope.launch {
+            withContext(Dispatchers.IO) {
+                BackupConfig.toFile(config, configFile)
+            }
+            binding.configStatusText.text = "配置已保存到 ${configFile.absolutePath}"
+        }
+    }
+
+    private fun initResticRepo() {
+        val binaryPath = ResticBinary.prepare(requireContext())
+        if (binaryPath == null) {
+            binding.resticStatusText.text = "restic 二進制未就緒，請確保已安裝 restic 於 Termux 或 APK 內置版本可用"
+            return
+        }
+        ResticWrapper.binaryPath = binaryPath
+
+        val repo = binding.resticRepoEdit.text?.toString()?.trim() ?: ""
+        val password = binding.resticPasswordEdit.text?.toString() ?: ""
+        if (repo.isEmpty() || password.isEmpty()) {
+            binding.resticStatusText.text = "請填寫倉庫路徑和密碼"
+            return
+        }
+
+        binding.initResticButton.isEnabled = false
+        binding.resticStatusText.text = "正在初始化 restic 倉庫…"
+
+        viewLifecycleOwner.lifecycleScope.launch {
+            val result = ResticWrapper.init(repo, password,
+                backend = config.resticBackend,
+                backendUrl = config.resticBackendUrl,
+                backendUser = config.resticBackendUser,
+                backendPass = config.resticBackendPass)
+            result.fold(
+                onSuccess = {
+                    binding.resticStatusText.text = "倉庫初始化成功: $repo"
+                    refreshResticStatus()
+                },
+                onFailure = { e -> binding.resticStatusText.text = "初始化失敗: ${e.message}" }
+            )
+            binding.initResticButton.isEnabled = true
+        }
+    }
+
+    /** Refresh the restic management buttons visibility based on repo state. */
+    private fun refreshResticStatus() {
+        if (config.resticEnabled != 1 || config.resticRepo.isBlank()) {
+            binding.initResticButton.visibility = View.GONE
+            binding.resticStatsButton.visibility = View.GONE
+            binding.resticPruneButton.visibility = View.GONE
+            return
+        }
+
+        val binaryPath = ResticBinary.prepare(requireContext())
+        if (binaryPath == null) {
+            binding.initResticButton.visibility = View.VISIBLE
+            binding.resticStatsButton.visibility = View.GONE
+            binding.resticPruneButton.visibility = View.GONE
+            binding.resticStatusText.text = "restic 二進制未就緒"
+            return
+        }
+
+        ResticWrapper.binaryPath = binaryPath
+
+        // Check if repo is initialized by listing snapshots
+        viewLifecycleOwner.lifecycleScope.launch {
+            val snapshotsResult = ResticWrapper.listSnapshots(config.resticRepo, config.resticPassword,
+                backend = config.resticBackend,
+                backendUrl = config.resticBackendUrl,
+                backendUser = config.resticBackendUser,
+                backendPass = config.resticBackendPass)
+            if (snapshotsResult.isSuccess) {
+                val snapshots = snapshotsResult.getOrDefault(emptyList())
+                binding.initResticButton.visibility = View.GONE
+                binding.resticStatsButton.visibility = View.VISIBLE
+                binding.resticPruneButton.visibility = View.VISIBLE
+                binding.resticStatusText.text = "倉庫就緒，${snapshots.size} 個快照"
+            } else {
+                binding.initResticButton.visibility = View.VISIBLE
+                binding.resticStatsButton.visibility = View.GONE
+                binding.resticPruneButton.visibility = View.GONE
+                binding.resticStatusText.text = "倉庫未初始化或認證失敗"
+            }
+        }
+    }
+
+    private fun showResticStats() {
+        binding.resticStatsButton.isEnabled = false
+        binding.resticStatusText.text = "正在讀取統計…"
+        viewLifecycleOwner.lifecycleScope.launch {
+            val statsResult = ResticWrapper.stats(config.resticRepo, config.resticPassword,
+                backend = config.resticBackend,
+                backendUrl = config.resticBackendUrl,
+                backendUser = config.resticBackendUser,
+                backendPass = config.resticBackendPass)
+            val snapshotsResult = ResticWrapper.listSnapshots(config.resticRepo, config.resticPassword,
+                backend = config.resticBackend,
+                backendUrl = config.resticBackendUrl,
+                backendUser = config.resticBackendUser,
+                backendPass = config.resticBackendPass)
+            binding.resticStatsButton.isEnabled = true
+
+            val snapshotCount = snapshotsResult.getOrDefault(emptyList()).size
+            binding.resticStatusText.text = buildString {
+                appendLine("快照數: $snapshotCount")
+                if (statsResult.isSuccess) {
+                    appendLine(statsResult.getOrDefault(""))
+                } else {
+                    appendLine("統計讀取失敗: ${statsResult.exceptionOrNull()?.message}")
+                }
+            }
+        }
+    }
+
+    private fun pruneResticSnapshots() {
+        binding.resticPruneButton.isEnabled = false
+        binding.resticStatusText.text = "正在清理舊快照 (保留 7 天 / 4 週 / 3 月)…"
+        viewLifecycleOwner.lifecycleScope.launch {
+            val forgetResult = ResticWrapper.forget(
+                config.resticRepo, config.resticPassword,
+                keepDaily = 7, keepWeekly = 4, keepMonthly = 3,
+                backend = config.resticBackend,
+                backendUrl = config.resticBackendUrl,
+                backendUser = config.resticBackendUser,
+                backendPass = config.resticBackendPass
+            )
+            if (forgetResult.isFailure) {
+                binding.resticStatusText.text = "forget 失敗: ${forgetResult.exceptionOrNull()?.message}"
+                binding.resticPruneButton.isEnabled = true
+                return@launch
+            }
+
+            binding.resticStatusText.text = "正在回收空間…"
+            val pruneResult = ResticWrapper.prune(config.resticRepo, config.resticPassword,
+                backend = config.resticBackend,
+                backendUrl = config.resticBackendUrl,
+                backendUser = config.resticBackendUser,
+                backendPass = config.resticBackendPass)
+            binding.resticPruneButton.isEnabled = true
+
+            if (pruneResult.isSuccess) {
+                binding.resticStatusText.text = "清理完成！\n${pruneResult.getOrDefault("")}"
+                refreshResticStatus()
+            } else {
+                binding.resticStatusText.text = "prune 失敗: ${pruneResult.exceptionOrNull()?.message}"
+            }
+        }
+    }
+
+    /** Show/hide backend URL/user/pass fields based on selected backend. */
+    private fun updateBackendFieldVisibility() {
+        val backend = when (binding.resticBackendGroup.checkedButtonId) {
+            R.id.resticBackendWebdav -> "webdav"
+            R.id.resticBackendSmb -> "smb"
+            else -> "local"
+        }
+        val isRemote = backend != "local"
+        binding.resticBackendUrlLayout.visibility = if (isRemote) View.VISIBLE else View.GONE
+        binding.resticBackendUserLayout.visibility = if (isRemote) View.VISIBLE else View.GONE
+        binding.resticBackendPassLayout.visibility = if (isRemote) View.VISIBLE else View.GONE
+
+        // Update URL field hint
+        binding.resticBackendUrlLayout.hint = when (backend) {
+            "webdav" -> "WebDAV 地址 (https://host:port/path)"
+            "smb" -> "SMB 主機位址 (host 或 host:port)"
+            else -> ""
+        }
+        updateComputedUrl()
+    }
+
+    /** Show the computed restic repo URL. */
+    private fun updateComputedUrl() {
+        val backend = when (binding.resticBackendGroup.checkedButtonId) {
+            R.id.resticBackendWebdav -> "webdav"
+            R.id.resticBackendSmb -> "smb"
+            else -> "local"
+        }
+        val repo = binding.resticRepoEdit.text?.toString()?.trim() ?: ""
+        val url = binding.resticBackendUrlEdit.text?.toString()?.trim() ?: ""
+        val repoUrl = ResticWrapper.buildRepoUrl(backend, repo, url)
+        binding.resticComputedUrlText.text = if (repo.isNotEmpty())
+            "實際倉庫: $repoUrl" else ""
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }
+}
diff --git a/app/src/main/java/com/example/androidbackupgui/ui/RestoreFragment.kt b/app/src/main/java/com/example/androidbackupgui/ui/RestoreFragment.kt
new file mode 100644
index 0000000..c9cd2ff
--- /dev/null
+++ b/app/src/main/java/com/example/androidbackupgui/ui/RestoreFragment.kt
@@ -0,0 +1,352 @@
+package com.example.androidbackupgui.ui
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.CheckBox
+import android.widget.LinearLayout
+import android.widget.TextView
+import com.google.android.material.card.MaterialCardView
+import com.google.android.material.color.MaterialColors
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.lifecycleScope
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import com.example.androidbackupgui.R
+import com.example.androidbackupgui.backup.BackupConfig
+import com.example.androidbackupgui.backup.RestoreOperation
+import com.example.androidbackupgui.backup.ResticBinary
+import com.example.androidbackupgui.backup.ResticWrapper
+import com.example.androidbackupgui.backup.WifiManager
+import com.example.androidbackupgui.databinding.FragmentRestoreBinding
+import kotlinx.coroutines.launch
+import java.io.File
+
+class RestoreFragment : Fragment() {
+
+    private var _binding: FragmentRestoreBinding? = null
+    private val binding get() = _binding!!
+    private var backupDir: File? = null
+    private var packages: List<String> = emptyList()
+    private var selectedPackages = mutableSetOf<String>()
+    private var resticConfig: BackupConfig? = null
+    private var selectedSnapshot: ResticWrapper.ResticSnapshot? = null
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?
+    ): View {
+        _binding = FragmentRestoreBinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        binding.appList.layoutManager = LinearLayoutManager(requireContext())
+
+        // Load restic config
+        val configFile = File(requireContext().filesDir, "backup_settings.conf")
+        val config = BackupConfig.fromFile(configFile)
+
+        // Show restic button if enabled and binary available
+        if (config.resticEnabled == 1 && config.resticRepo.isNotBlank()) {
+            resticConfig = config
+            val binaryPath = ResticBinary.prepare(requireContext())
+            if (binaryPath != null) {
+                ResticWrapper.binaryPath = binaryPath
+                binding.selectResticButton.visibility = View.VISIBLE
+            }
+        }
+
+        binding.selectDirButton.setOnClickListener { selectBackupDir() }
+        binding.selectResticButton.setOnClickListener { selectResticSnapshot() }
+        binding.restoreButton.setOnClickListener { startRestore() }
+    }
+
+    private fun selectBackupDir() {
+        val defaultDir = File(requireContext().filesDir.absolutePath)
+        val backupDirs = defaultDir.listFiles()
+            ?.filter { it.isDirectory && it.name.startsWith("Backup_") }
+            ?: emptyList()
+
+        if (backupDirs.isNotEmpty()) {
+            backupDir = backupDirs.first()
+            selectedSnapshot = null
+            loadBackupDir(backupDirs.first())
+        } else {
+            binding.statusText.text = "未找到備份目錄，請確保 Backup_* 資料夾存在於 ${defaultDir.absolutePath}"
+        }
+    }
+
+    private fun loadBackupDir(dir: File) {
+        binding.backupDirText.text = dir.absolutePath
+
+        val appListFile = File(dir, "appList.txt")
+        packages = if (appListFile.exists()) {
+            appListFile.readLines()
+                .map { it.trim() }
+                .filter { it.isNotEmpty() && !it.startsWith("#") }
+        } else {
+            dir.listFiles()
+                ?.filter { it.isDirectory }
+                ?.map { it.name }
+                ?: emptyList()
+        }
+
+        selectedPackages.clear()
+        selectedPackages.addAll(packages)
+
+        binding.statusText.text = "共 ${packages.size} 個備份應用"
+        binding.restoreButton.isEnabled = packages.isNotEmpty()
+
+        setupAppList()
+    }
+
+    private fun selectResticSnapshot() {
+        val config = resticConfig ?: return
+        setRunning(true)
+        binding.statusText.text = "正在讀取 restic 快照列表…"
+
+        viewLifecycleOwner.lifecycleScope.launch {
+            val snapshotsResult = ResticWrapper.listSnapshots(
+                config.resticRepo, config.resticPassword,
+                backend = config.resticBackend,
+                backendUrl = config.resticBackendUrl,
+                backendUser = config.resticBackendUser,
+                backendPass = config.resticBackendPass
+            )
+            if (snapshotsResult.isFailure) {
+                binding.statusText.text = "讀取快照失敗: ${snapshotsResult.exceptionOrNull()?.message}"
+                setRunning(false)
+                return@launch
+            }
+
+            val snapshots = snapshotsResult.getOrThrow()
+            if (snapshots.isEmpty()) {
+                binding.statusText.text = "沒有可用的 restic 快照"
+                setRunning(false)
+                return@launch
+            }
+
+            // Switch to restic source
+            backupDir = null
+            selectedSnapshot = snapshots.first()
+            val backupPath = selectedSnapshot!!.paths.firstOrNull() ?: run {
+                binding.statusText.text = "快照中找不到備份路徑"
+                setRunning(false)
+                return@launch
+            }
+
+            // Read app list from the snapshot
+            val appListContent = readResticFile(config, selectedSnapshot!!.id, "$backupPath/appList.txt")
+            packages = if (appListContent != null) {
+                appListContent.lines().map { it.trim() }.filter { it.isNotEmpty() && !it.startsWith("#") }
+            } else {
+                emptyList()
+            }
+
+            if (packages.isEmpty()) {
+                binding.statusText.text = "無法從快照讀取應用列表"
+                setRunning(false)
+                return@launch
+            }
+
+            binding.backupDirText.text = "restic: ${selectedSnapshot!!.time.take(19)} (${snapshots.size} 個快照可用)"
+            selectedPackages.clear()
+            selectedPackages.addAll(packages)
+            binding.statusText.text = "restic 快照共 ${packages.size} 個應用，點擊恢復開始"
+            binding.restoreButton.isEnabled = true
+            setRunning(false)
+            setupAppList()
+        }
+    }
+
+    /** Read a single file from a restic snapshot using `restic dump`. */
+    private suspend fun readResticFile(
+        config: BackupConfig,
+        snapshotId: String,
+        filePath: String
+    ): String? {
+        return try {
+            val env = ResticWrapper.buildFullEnv(
+                config.resticRepo,
+                config.resticPassword,
+                config.resticBackend,
+                config.resticBackendUrl,
+                config.resticBackendUser,
+                config.resticBackendPass
+            )
+
+            val cmd = ResticWrapper.buildCommandArgs(listOf("dump", snapshotId, filePath))
+            val process = ProcessBuilder(cmd)
+                .apply { environment().putAll(env) }
+                .redirectErrorStream(false)
+                .start()
+
+            // Drain stderr in background FIRST to prevent pipe-buffer deadlock
+            val stderrDrain = Thread({
+                try { process.errorStream.bufferedReader().use { while (it.readLine() != null) {} } } catch (_: Exception) {}
+            }, "restic-dump-stderr").apply { isDaemon = true; start() }
+
+            val stdout = process.inputStream.bufferedReader().use { it.readText() }
+            stderrDrain.join(5000)
+            process.waitFor()
+
+            if (process.exitValue() == 0) stdout else null
+        } catch (_: Exception) {
+            null
+        }
+    }
+
+    private fun setupAppList() {
+        binding.appList.adapter = PackageAdapter(packages, selectedPackages) { pkg, checked ->
+            if (checked) selectedPackages.add(pkg) else selectedPackages.remove(pkg)
+            binding.statusText.text = "已選擇 ${selectedPackages.size}/${packages.size} 個應用"
+        }
+    }
+
+    private fun startRestore() {
+        val toRestore = packages.filter { it in selectedPackages }
+        if (toRestore.isEmpty()) return
+
+        setRunning(true)
+        binding.restoreButton.isEnabled = false
+        binding.selectDirButton.isEnabled = false
+
+        viewLifecycleOwner.lifecycleScope.launch {
+            val result = if (selectedSnapshot != null && resticConfig != null) {
+                // Restic restore
+                val snapshot = selectedSnapshot!!
+                val config = resticConfig!!
+                val backupPath = snapshot.paths.firstOrNull() ?: return@launch
+
+                val staging = File(requireContext().cacheDir, "restic_restore_${snapshot.shortId}")
+                staging.mkdirs()
+
+                binding.statusText.text = "正在從 restic 快照恢復到暫存目錄…"
+                val restoreResult = ResticWrapper.restore(
+                    repoPath = config.resticRepo,
+                    password = config.resticPassword,
+                    snapshotId = snapshot.id,
+                    targetPath = staging.absolutePath,
+                    backend = config.resticBackend,
+                    backendUrl = config.resticBackendUrl,
+                    backendUser = config.resticBackendUser,
+                    backendPass = config.resticBackendPass,
+                    onProgress = { msg -> binding.statusText.text = msg }
+                )
+
+                if (restoreResult.isFailure) {
+                    binding.statusText.text = "restic 恢復失敗: ${restoreResult.exceptionOrNull()?.message}"
+                    setRunning(false)
+                    binding.selectDirButton.isEnabled = true
+                    return@launch
+                }
+
+                // The restored backup directory: <staging>/<original_absolute_path>
+                val restoredBackupDir = File(staging, backupPath.removePrefix("/"))
+                binding.statusText.text = "正在從恢復的備份安裝應用…"
+
+                val r = RestoreOperation.restoreApps(
+                    backupDir = restoredBackupDir,
+                    filterPkgs = selectedPackages,
+                    onProgress = { progress ->
+                        binding.statusText.text =
+                            "[${progress.current}/${progress.total}] ${progress.packageName}: ${progress.message}"
+                    }
+                )
+                // Cleanup staging
+                try { staging.deleteRecursively() } catch (_: Exception) {}
+                r
+            } else {
+                // Local restore
+                val dir = backupDir ?: return@launch
+                val r = RestoreOperation.restoreApps(
+                    backupDir = dir,
+                    filterPkgs = selectedPackages,
+                    onProgress = { progress ->
+                        binding.statusText.text =
+                            "[${progress.current}/${progress.total}] ${progress.packageName}: ${progress.message}"
+                    }
+                )
+                // Also restore WiFi if backup exists locally
+                WifiManager.restore(dir)
+                r
+            }
+
+            binding.statusText.text = buildString {
+                appendLine("恢復完成！")
+                appendLine("成功: ${result.successCount}  失敗: ${result.failCount}")
+                appendLine("耗時: ${result.elapsedMs / 1000}秒")
+                appendLine("如有 SSAID，請立即重啟設備後再開啟應用")
+            }
+            setRunning(false)
+            binding.selectDirButton.isEnabled = true
+        }
+    }
+
+    private fun setRunning(running: Boolean) {
+        binding.progressBar.visibility = if (running) View.VISIBLE else View.GONE
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }
+
+    private class PackageAdapter(
+        private val packages: List<String>,
+        private val selected: Set<String>,
+        private val onToggle: (String, Boolean) -> Unit
+    ) : RecyclerView.Adapter<PackageAdapter.ViewHolder>() {
+
+        class ViewHolder(view: View) : RecyclerView.ViewHolder(view) {
+            val checkbox: CheckBox = view.findViewById(R.id.checkbox)
+            val textView: TextView = view.findViewById(R.id.appName)
+        }
+
+        override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
+            val ctx = parent.context
+            val card = MaterialCardView(ctx).apply {
+                layoutParams = ViewGroup.MarginLayoutParams(
+                    ViewGroup.LayoutParams.MATCH_PARENT,
+                    ViewGroup.LayoutParams.WRAP_CONTENT
+                ).apply { setMargins(0, 0, 0, 8) }
+                radius = 12f
+                cardElevation = 0f
+                strokeWidth = 0
+                setCardBackgroundColor(
+                    MaterialColors.getColor(ctx, com.google.android.material.R.attr.colorSurfaceContainer, 0)
+                )
+            }
+            val layout = LinearLayout(ctx).apply {
+                orientation = LinearLayout.HORIZONTAL
+                setPadding(16, 12, 16, 12)
+            }
+            val cb = CheckBox(ctx).apply { id = R.id.checkbox }
+            val tv = TextView(ctx).apply {
+                id = R.id.appName
+                setPadding(16, 0, 0, 0)
+                textSize = 15f
+                setTextColor(
+                    MaterialColors.getColor(ctx, com.google.android.material.R.attr.colorOnSurface, 0)
+                )
+            }
+            layout.addView(cb)
+            layout.addView(tv)
+            card.addView(layout)
+            return ViewHolder(card)
+        }
+
+        override fun onBindViewHolder(holder: ViewHolder, position: Int) {
+            val pkg = packages[position]
+            holder.textView.text = pkg
+            holder.checkbox.isChecked = pkg in selected
+            holder.checkbox.setOnCheckedChangeListener { _, checked ->
+                onToggle(pkg, checked)
+            }
+        }
+
+        override fun getItemCount() = packages.size
+    }
+}
diff --git a/app/src/main/res/drawable/ic_backup.xml b/app/src/main/res/drawable/ic_backup.xml
new file mode 100644
index 0000000..4b467e4
--- /dev/null
+++ b/app/src/main/res/drawable/ic_backup.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+
+    <path
+        android:fillColor="#000000"
+        android:pathData="M19,9h-4V3H9v6H5l7,7 7,-7zM5,18v2h14v-2H5z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_config.xml b/app/src/main/res/drawable/ic_config.xml
new file mode 100644
index 0000000..7eaabd6
--- /dev/null
+++ b/app/src/main/res/drawable/ic_config.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+
+    <path
+        android:fillColor="#000000"
+        android:pathData="M19.14,12.94c0.04,-0.3 0.06,-0.61 0.06,-0.94 0,-0.32 -0.02,-0.64 -0.07,-0.94l2.03,-1.58c0.18,-0.14 0.23,-0.41 0.12,-0.61l-1.92,-3.32c-0.12,-0.22 -0.37,-0.29 -0.59,-0.22l-2.39,0.96c-0.5,-0.38 -1.03,-0.7 -1.62,-0.94L14.4,2.81c-0.04,-0.24 -0.24,-0.41 -0.48,-0.41h-3.84c-0.24,0 -0.43,0.17 -0.47,0.41L9.25,5.35C8.66,5.59 8.12,5.92 7.63,6.29L5.24,5.33c-0.22,-0.08 -0.47,0 -0.59,0.22L2.74,8.87C2.62,9.08 2.66,9.34 2.86,9.48l2.03,1.58C4.84,11.36 4.8,11.69 4.8,12s0.02,0.64 0.07,0.94l-2.03,1.58c-0.18,0.14 -0.23,0.41 -0.12,0.61l1.92,3.32c0.12,0.22 0.37,0.29 0.59,0.22l2.39,-0.96c0.5,0.38 1.03,0.7 1.62,0.94l0.36,2.54c0.05,0.24 0.24,0.41 0.48,0.41h3.84c0.24,0 0.44,-0.17 0.47,-0.41l0.36,-2.54c0.59,-0.24 1.13,-0.56 1.62,-0.94l2.39,0.96c0.22,0.08 0.47,0 0.59,-0.22l1.92,-3.32c0.12,-0.22 0.07,-0.47 -0.12,-0.61l-2.01,-1.58zM12,15.6c-1.98,0 -3.6,-1.62 -3.6,-3.6s1.62,-3.6 3.6,-3.6 3.6,1.62 3.6,3.6 -1.62,3.6 -3.6,3.6z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_launcher_foreground.xml b/app/src/main/res/drawable/ic_launcher_foreground.xml
new file mode 100644
index 0000000..a54d4a7
--- /dev/null
+++ b/app/src/main/res/drawable/ic_launcher_foreground.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#1565C0"
+        android:pathData="M54,27 C39.1,27 27,39.1 27,54 C27,68.9 39.1,81 54,81 C68.9,81 81,68.9 81,54 C81,39.1 68.9,27 54,27 Z M54,36 L54,45 L63,45 L63,63 L45,63 L45,45 L54,45 Z" />
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M50,45 L58,45 L58,48 L50,48 Z M50,52 L58,52 L58,55 L50,55 Z M50,59 L58,59 L58,62 L50,62 Z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_restore.xml b/app/src/main/res/drawable/ic_restore.xml
new file mode 100644
index 0000000..20c737c
--- /dev/null
+++ b/app/src/main/res/drawable/ic_restore.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+
+    <path
+        android:fillColor="#000000"
+        android:pathData="M9,16h6v-6h4l-7,-7 -7,7h4zM5,18h14v2H5z" />
+</vector>
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
new file mode 100644
index 0000000..880f106
--- /dev/null
+++ b/app/src/main/res/layout/activity_main.xml
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:background="?attr/colorSurface">
+
+    <com.google.android.material.appbar.MaterialToolbar
+        android:id="@+id/topAppBar"
+        android:layout_width="match_parent"
+        android:layout_height="?attr/actionBarSize"
+        android:background="?attr/colorSurface"
+        app:title="@string/app_name"
+        app:titleCentered="true"
+        app:titleTextColor="?attr/colorOnSurface"
+        style="@style/Widget.Material3.Toolbar" />
+
+    <androidx.viewpager2.widget.ViewPager2
+        android:id="@+id/viewPager"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1" />
+
+    <com.google.android.material.bottomnavigation.BottomNavigationView
+        android:id="@+id/bottomNav"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="?attr/colorSurfaceContainer"
+        app:menu="@menu/bottom_nav"
+        app:labelVisibilityMode="labeled" />
+
+</LinearLayout>
diff --git a/app/src/main/res/layout/fragment_backup.xml b/app/src/main/res/layout/fragment_backup.xml
new file mode 100644
index 0000000..0587316
--- /dev/null
+++ b/app/src/main/res/layout/fragment_backup.xml
@@ -0,0 +1,69 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:padding="16dp"
+    android:background="?attr/colorSurface">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center_vertical"
+        android:orientation="horizontal">
+
+        <TextView
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="應用備份"
+            android:textAppearance="@style/TextAppearance.Material3.HeadlineSmall"
+            android:textColor="?attr/colorOnSurface" />
+
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/scanButton"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="掃描應用"
+            style="@style/Widget.Material3.Button.TonalButton" />
+    </LinearLayout>
+
+    <com.google.android.material.progressindicator.LinearProgressIndicator
+        android:id="@+id/progressBar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="12dp"
+        android:indeterminate="true"
+        android:visibility="gone"
+        app:indicatorColor="?attr/colorPrimary"
+        app:trackColor="?attr/colorSurfaceVariant" />
+
+    <TextView
+        android:id="@+id/statusText"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:text="點擊掃描以載入應用列表"
+        android:textAppearance="@style/TextAppearance.Material3.BodySmall"
+        android:textColor="?attr/colorOnSurfaceVariant" />
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/appList"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:layout_marginTop="12dp"
+        android:clipToPadding="false"
+        android:paddingBottom="8dp" />
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/backupButton"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="12dp"
+        android:enabled="false"
+        android:text="開始備份選中應用"
+        style="@style/Widget.Material3.Button" />
+
+</LinearLayout>
diff --git a/app/src/main/res/layout/fragment_config.xml b/app/src/main/res/layout/fragment_config.xml
new file mode 100644
index 0000000..467770d
--- /dev/null
+++ b/app/src/main/res/layout/fragment_config.xml
@@ -0,0 +1,347 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="?attr/colorSurface"
+    android:clipToPadding="false"
+    android:padding="16dp">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical">
+
+        <!-- ═══════ 備份選項 ═══════ -->
+        <com.google.android.material.card.MaterialCardView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="16dp"
+            app:cardElevation="0dp"
+            app:cardBackgroundColor="?attr/colorSurfaceContainer"
+            app:strokeWidth="0dp"
+            app:contentPadding="16dp">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical">
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:text="備份選項"
+                    android:textAppearance="@style/TextAppearance.Material3.TitleMedium"
+                    android:textColor="?attr/colorPrimary" />
+
+                <com.google.android.material.switchmaterial.SwitchMaterial
+                    android:id="@+id/backupModeSwitch"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="12dp"
+                    android:text="備份數據+安裝包 (關閉則僅備份安裝包)" />
+
+                <com.google.android.material.switchmaterial.SwitchMaterial
+                    android:id="@+id/backupUserDataSwitch"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="4dp"
+                    android:text="備份使用者數據" />
+
+                <com.google.android.material.switchmaterial.SwitchMaterial
+                    android:id="@+id/backupObbSwitch"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="4dp"
+                    android:text="備份 OBB 外部數據包" />
+
+                <com.google.android.material.switchmaterial.SwitchMaterial
+                    android:id="@+id/backupWifiSwitch"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="4dp"
+                    android:text="備份 WiFi 設定" />
+
+                <com.google.android.material.switchmaterial.SwitchMaterial
+                    android:id="@+id/ignoreRunningSwitch"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="4dp"
+                    android:text="忽略運行中的應用" />
+
+            </LinearLayout>
+        </com.google.android.material.card.MaterialCardView>
+
+        <!-- ═══════ 輸出路徑 ═══════ -->
+        <com.google.android.material.card.MaterialCardView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="16dp"
+            app:cardElevation="0dp"
+            app:cardBackgroundColor="?attr/colorSurfaceContainer"
+            app:strokeWidth="0dp"
+            app:contentPadding="16dp">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical">
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:text="輸出路徑"
+                    android:textAppearance="@style/TextAppearance.Material3.TitleMedium"
+                    android:textColor="?attr/colorPrimary" />
+
+                <com.google.android.material.textfield.TextInputLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="12dp"
+                    android:hint="輸出路徑 (留空使用默認)"
+                    style="@style/Widget.Material3.TextInputLayout.OutlinedBox">
+                    <com.google.android.material.textfield.TextInputEditText
+                        android:id="@+id/outputPathEdit"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:singleLine="true" />
+                </com.google.android.material.textfield.TextInputLayout>
+
+                <com.google.android.material.textfield.TextInputLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="8dp"
+                    android:hint="壓縮算法 (zstd / tar)"
+                    style="@style/Widget.Material3.TextInputLayout.OutlinedBox">
+                    <com.google.android.material.textfield.TextInputEditText
+                        android:id="@+id/compressionEdit"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:singleLine="true"
+                        android:text="zstd" />
+                </com.google.android.material.textfield.TextInputLayout>
+
+            </LinearLayout>
+        </com.google.android.material.card.MaterialCardView>
+
+        <!-- ═══════ Restic 雲端備份 ═══════ -->
+        <com.google.android.material.card.MaterialCardView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="16dp"
+            app:cardElevation="0dp"
+            app:cardBackgroundColor="?attr/colorSurfaceContainer"
+            app:strokeWidth="0dp"
+            app:contentPadding="16dp">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical">
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:text="Restic 雲端備份"
+                    android:textAppearance="@style/TextAppearance.Material3.TitleMedium"
+                    android:textColor="?attr/colorPrimary" />
+
+                <com.google.android.material.switchmaterial.SwitchMaterial
+                    android:id="@+id/resticEnabledSwitch"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="12dp"
+                    android:text="啟用 restic 增量去重 (需安裝 restic 二進制)" />
+
+                <!-- Backend selector -->
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="12dp"
+                    android:text="儲存位置"
+                    android:textAppearance="@style/TextAppearance.Material3.LabelLarge"
+                    android:textColor="?attr/colorOnSurface" />
+
+                <com.google.android.material.button.MaterialButtonToggleGroup
+                    android:id="@+id/resticBackendGroup"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="4dp"
+                    app:singleSelection="true"
+                    app:selectionRequired="true">
+
+                    <com.google.android.material.button.MaterialButton
+                        android:id="@+id/resticBackendLocal"
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_weight="1"
+                        android:text="本機"
+                        style="@style/Widget.Material3.Button.TonalButton" />
+
+                    <com.google.android.material.button.MaterialButton
+                        android:id="@+id/resticBackendWebdav"
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_weight="1"
+                        android:text="WebDAV"
+                        style="@style/Widget.Material3.Button.TonalButton" />
+
+                    <com.google.android.material.button.MaterialButton
+                        android:id="@+id/resticBackendSmb"
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_weight="1"
+                        android:text="SMB"
+                        style="@style/Widget.Material3.Button.TonalButton" />
+
+                </com.google.android.material.button.MaterialButtonToggleGroup>
+
+                <!-- Backend URL (WebDAV/SMB only) -->
+                <com.google.android.material.textfield.TextInputLayout
+                    android:id="@+id/resticBackendUrlLayout"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="8dp"
+                    android:hint="WebDAV 地址 (https://host:port/path)"
+                    android:visibility="gone"
+                    style="@style/Widget.Material3.TextInputLayout.OutlinedBox">
+                    <com.google.android.material.textfield.TextInputEditText
+                        android:id="@+id/resticBackendUrlEdit"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:singleLine="true"
+                        android:inputType="textUri" />
+                </com.google.android.material.textfield.TextInputLayout>
+
+                <!-- Backend user (WebDAV/SMB only) -->
+                <com.google.android.material.textfield.TextInputLayout
+                    android:id="@+id/resticBackendUserLayout"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="8dp"
+                    android:hint="用戶名"
+                    android:visibility="gone"
+                    style="@style/Widget.Material3.TextInputLayout.OutlinedBox">
+                    <com.google.android.material.textfield.TextInputEditText
+                        android:id="@+id/resticBackendUserEdit"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:singleLine="true" />
+                </com.google.android.material.textfield.TextInputLayout>
+
+                <!-- Backend password (WebDAV/SMB only) -->
+                <com.google.android.material.textfield.TextInputLayout
+                    android:id="@+id/resticBackendPassLayout"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="8dp"
+                    android:hint="密碼"
+                    android:visibility="gone"
+                    style="@style/Widget.Material3.TextInputLayout.OutlinedBox">
+                    <com.google.android.material.textfield.TextInputEditText
+                        android:id="@+id/resticBackendPassEdit"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:inputType="textPassword"
+                        android:singleLine="true" />
+                </com.google.android.material.textfield.TextInputLayout>
+
+                <!-- Repo path (always shown) -->
+                <com.google.android.material.textfield.TextInputLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="8dp"
+                    android:hint="倉庫路徑 (本機: /sdcard/restic-repo / 雲端: 目錄名如 android-backups)"
+                    style="@style/Widget.Material3.TextInputLayout.OutlinedBox">
+                    <com.google.android.material.textfield.TextInputEditText
+                        android:id="@+id/resticRepoEdit"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:singleLine="true" />
+                </com.google.android.material.textfield.TextInputLayout>
+
+                <!-- Repo encryption password (always shown) -->
+                <com.google.android.material.textfield.TextInputLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="8dp"
+                    android:hint="倉庫加密密碼 (請妥善保管，遺失即無法恢復)"
+                    style="@style/Widget.Material3.TextInputLayout.OutlinedBox">
+                    <com.google.android.material.textfield.TextInputEditText
+                        android:id="@+id/resticPasswordEdit"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:inputType="textPassword"
+                        android:singleLine="true" />
+                </com.google.android.material.textfield.TextInputLayout>
+
+                <!-- Computed repo URL -->
+                <TextView
+                    android:id="@+id/resticComputedUrlText"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="4dp"
+                    android:textAppearance="@style/TextAppearance.Material3.BodySmall"
+                    android:textColor="?attr/colorOnSurfaceVariant" />
+
+                <!-- Action buttons -->
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="8dp"
+                    android:gravity="center_vertical"
+                    android:orientation="horizontal">
+
+                    <com.google.android.material.button.MaterialButton
+                        android:id="@+id/initResticButton"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="初始化"
+                        style="@style/Widget.Material3.Button.TextButton" />
+
+                    <com.google.android.material.button.MaterialButton
+                        android:id="@+id/resticStatsButton"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="統計"
+                        android:visibility="gone"
+                        style="@style/Widget.Material3.Button.TextButton" />
+
+                    <com.google.android.material.button.MaterialButton
+                        android:id="@+id/resticPruneButton"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="清理"
+                        android:visibility="gone"
+                        style="@style/Widget.Material3.Button.TextButton" />
+                </LinearLayout>
+
+                <TextView
+                    android:id="@+id/resticStatusText"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="8dp"
+                    android:textAppearance="@style/TextAppearance.Material3.BodySmall"
+                    android:textColor="?attr/colorOnSurfaceVariant" />
+
+            </LinearLayout>
+        </com.google.android.material.card.MaterialCardView>
+
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/saveConfigButton"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="8dp"
+            android:text="保存配置"
+            style="@style/Widget.Material3.Button" />
+
+        <TextView
+            android:id="@+id/configStatusText"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="24dp"
+            android:textAppearance="@style/TextAppearance.Material3.BodySmall"
+            android:textColor="?attr/colorOnSurfaceVariant" />
+
+    </LinearLayout>
+</ScrollView>
diff --git a/app/src/main/res/layout/fragment_restore.xml b/app/src/main/res/layout/fragment_restore.xml
new file mode 100644
index 0000000..12b0bee
--- /dev/null
+++ b/app/src/main/res/layout/fragment_restore.xml
@@ -0,0 +1,89 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:padding="16dp"
+    android:background="?attr/colorSurface">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center_vertical"
+        android:orientation="horizontal">
+
+        <TextView
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="應用恢復"
+            android:textAppearance="@style/TextAppearance.Material3.HeadlineSmall"
+            android:textColor="?attr/colorOnSurface" />
+
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/selectDirButton"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="本地"
+            style="@style/Widget.Material3.Button.TonalButton" />
+
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/selectResticButton"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="8dp"
+            android:text="Restic"
+            android:visibility="gone"
+            style="@style/Widget.Material3.Button.TonalButton" />
+    </LinearLayout>
+
+    <TextView
+        android:id="@+id/backupDirText"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="12dp"
+        android:ellipsize="middle"
+        android:singleLine="true"
+        android:text="未選擇備份目錄"
+        android:textAppearance="@style/TextAppearance.Material3.BodySmall"
+        android:textColor="?attr/colorOnSurfaceVariant" />
+
+    <com.google.android.material.progressindicator.LinearProgressIndicator
+        android:id="@+id/progressBar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:indeterminate="true"
+        android:visibility="gone"
+        app:indicatorColor="?attr/colorPrimary"
+        app:trackColor="?attr/colorSurfaceVariant" />
+
+    <TextView
+        android:id="@+id/statusText"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:text="請先選擇備份資料夾"
+        android:textAppearance="@style/TextAppearance.Material3.BodySmall"
+        android:textColor="?attr/colorOnSurfaceVariant" />
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/appList"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:layout_marginTop="12dp"
+        android:clipToPadding="false"
+        android:paddingBottom="8dp" />
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/restoreButton"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="12dp"
+        android:enabled="false"
+        android:text="開始恢復選中應用"
+        style="@style/Widget.Material3.Button" />
+
+</LinearLayout>
diff --git a/app/src/main/res/menu/bottom_nav.xml b/app/src/main/res/menu/bottom_nav.xml
new file mode 100644
index 0000000..a80c6c3
--- /dev/null
+++ b/app/src/main/res/menu/bottom_nav.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:id="@+id/nav_backup"
+        android:icon="@drawable/ic_backup"
+        android:title="備份" />
+    <item
+        android:id="@+id/nav_restore"
+        android:icon="@drawable/ic_restore"
+        android:title="恢復" />
+    <item
+        android:id="@+id/nav_config"
+        android:icon="@drawable/ic_config"
+        android:title="配置" />
+</menu>
diff --git a/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml b/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
new file mode 100644
index 0000000..f8ad4d6
--- /dev/null
+++ b/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/primary" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
diff --git a/app/src/main/res/values-night/colors.xml b/app/src/main/res/values-night/colors.xml
new file mode 100644
index 0000000..0f29c6b
--- /dev/null
+++ b/app/src/main/res/values-night/colors.xml
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- MD3 Primary (dark) -->
+    <color name="primary">#9ECAFF</color>
+    <color name="onPrimary">#003258</color>
+    <color name="primaryContainer">#00497D</color>
+    <color name="onPrimaryContainer">#D1E4FF</color>
+
+    <!-- MD3 Secondary (dark) -->
+    <color name="secondary">#FFB870</color>
+    <color name="onSecondary">#4A2800</color>
+    <color name="secondaryContainer">#6A3C00</color>
+    <color name="onSecondaryContainer">#FFDCB5</color>
+
+    <!-- MD3 Tertiary (dark) -->
+    <color name="tertiary">#8CD4C4</color>
+    <color name="onTertiary">#00382F</color>
+    <color name="tertiaryContainer">#005045</color>
+    <color name="onTertiaryContainer">#A7F0DE</color>
+
+    <!-- MD3 Error (dark) -->
+    <color name="error">#FFB4AB</color>
+    <color name="onError">#690005</color>
+    <color name="errorContainer">#93000A</color>
+    <color name="onErrorContainer">#FFDAD6</color>
+
+    <!-- MD3 Surface / Background (dark) -->
+    <color name="background">#1A1C1E</color>
+    <color name="onBackground">#E2E2E6</color>
+    <color name="surface">#1A1C1E</color>
+    <color name="onSurface">#E2E2E6</color>
+    <color name="surfaceVariant">#43474E</color>
+    <color name="onSurfaceVariant">#C3C6CF</color>
+    <color name="inverseSurface">#E2E2E6</color>
+    <color name="inverseOnSurface">#2F3033</color>
+
+    <!-- MD3 Outline (dark) -->
+    <color name="outline">#8D9199</color>
+    <color name="outlineVariant">#43474E</color>
+
+    <!-- Surface container hierarchy (dark) -->
+    <color name="surfaceContainerLowest">#0E1114</color>
+    <color name="surfaceContainerLow">#1A1C1E</color>
+    <color name="surfaceContainer">#1E2023</color>
+    <color name="surfaceContainerHigh">#292A2E</color>
+    <color name="surfaceContainerHighest">#333539</color>
+
+    <!-- Legacy console colors -->
+    <color name="consoleBg">#102027</color>
+    <color name="consoleText">#ECEFF1</color>
+</resources>
diff --git a/app/src/main/res/values-night/themes.xml b/app/src/main/res/values-night/themes.xml
new file mode 100644
index 0000000..af13160
--- /dev/null
+++ b/app/src/main/res/values-night/themes.xml
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="AppTheme" parent="Theme.Material3.DayNight.NoActionBar">
+        <!-- Primary -->
+        <item name="colorPrimary">@color/primary</item>
+        <item name="colorOnPrimary">@color/onPrimary</item>
+        <item name="colorPrimaryContainer">@color/primaryContainer</item>
+        <item name="colorOnPrimaryContainer">@color/onPrimaryContainer</item>
+
+        <!-- Secondary -->
+        <item name="colorSecondary">@color/secondary</item>
+        <item name="colorOnSecondary">@color/onSecondary</item>
+        <item name="colorSecondaryContainer">@color/secondaryContainer</item>
+        <item name="colorOnSecondaryContainer">@color/onSecondaryContainer</item>
+
+        <!-- Tertiary -->
+        <item name="colorTertiary">@color/tertiary</item>
+        <item name="colorOnTertiary">@color/onTertiary</item>
+        <item name="colorTertiaryContainer">@color/tertiaryContainer</item>
+        <item name="colorOnTertiaryContainer">@color/onTertiaryContainer</item>
+
+        <!-- Error -->
+        <item name="colorError">@color/error</item>
+        <item name="colorOnError">@color/onError</item>
+        <item name="colorErrorContainer">@color/errorContainer</item>
+        <item name="colorOnErrorContainer">@color/onErrorContainer</item>
+
+        <!-- Surface / Background -->
+        <item name="android:colorBackground">@color/background</item>
+        <item name="colorOnBackground">@color/onBackground</item>
+        <item name="colorSurface">@color/surface</item>
+        <item name="colorOnSurface">@color/onSurface</item>
+        <item name="colorSurfaceVariant">@color/surfaceVariant</item>
+        <item name="colorOnSurfaceVariant">@color/onSurfaceVariant</item>
+        <item name="colorSurfaceInverse">@color/inverseSurface</item>
+        <item name="colorOnSurfaceInverse">@color/inverseOnSurface</item>
+
+        <!-- Outline -->
+        <item name="colorOutline">@color/outline</item>
+        <item name="colorOutlineVariant">@color/outlineVariant</item>
+
+        <!-- Surface container hierarchy -->
+        <item name="colorSurfaceContainerLowest">@color/surfaceContainerLowest</item>
+        <item name="colorSurfaceContainerLow">@color/surfaceContainerLow</item>
+        <item name="colorSurfaceContainer">@color/surfaceContainer</item>
+        <item name="colorSurfaceContainerHigh">@color/surfaceContainerHigh</item>
+        <item name="colorSurfaceContainerHighest">@color/surfaceContainerHighest</item>
+
+        <!-- Status bar — dark theme -->
+        <item name="android:statusBarColor">@android:color/transparent</item>
+        <item name="android:navigationBarColor">@android:color/transparent</item>
+        <item name="android:windowLightStatusBar">false</item>
+    </style>
+</resources>
diff --git a/app/src/main/res/values/colors.xml b/app/src/main/res/values/colors.xml
new file mode 100644
index 0000000..c94c7ff
--- /dev/null
+++ b/app/src/main/res/values/colors.xml
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- MD3 Primary — deep blue -->
+    <color name="primary">#1565C0</color>
+    <color name="onPrimary">#FFFFFF</color>
+    <color name="primaryContainer">#D1E4FF</color>
+    <color name="onPrimaryContainer">#001D36</color>
+
+    <!-- MD3 Secondary — amber accent -->
+    <color name="secondary">#FF8F00</color>
+    <color name="onSecondary">#FFFFFF</color>
+    <color name="secondaryContainer">#FFDCB5</color>
+    <color name="onSecondaryContainer">#2D1800</color>
+
+    <!-- MD3 Tertiary — teal -->
+    <color name="tertiary">#00796B</color>
+    <color name="onTertiary">#FFFFFF</color>
+    <color name="tertiaryContainer">#A7F0DE</color>
+    <color name="onTertiaryContainer">#001F19</color>
+
+    <!-- MD3 Error -->
+    <color name="error">#BA1A1A</color>
+    <color name="onError">#FFFFFF</color>
+    <color name="errorContainer">#FFDAD6</color>
+    <color name="onErrorContainer">#410002</color>
+
+    <!-- MD3 Surface / Background (light) -->
+    <color name="background">#FDFCFF</color>
+    <color name="onBackground">#1A1C1E</color>
+    <color name="surface">#FDFCFF</color>
+    <color name="onSurface">#1A1C1E</color>
+    <color name="surfaceVariant">#DFE2EB</color>
+    <color name="onSurfaceVariant">#43474E</color>
+    <color name="inverseSurface">#2F3033</color>
+    <color name="inverseOnSurface">#F1F0F4</color>
+
+    <!-- MD3 Outline -->
+    <color name="outline">#73777F</color>
+    <color name="outlineVariant">#C3C6CF</color>
+
+    <!-- Surface container hierarchy (light) -->
+    <color name="surfaceContainerLowest">#FFFFFF</color>
+    <color name="surfaceContainerLow">#F7F9FC</color>
+    <color name="surfaceContainer">#F1F3F7</color>
+    <color name="surfaceContainerHigh">#EBEDF1</color>
+    <color name="surfaceContainerHighest">#E6E8EB</color>
+
+    <!-- Legacy console colors -->
+    <color name="consoleBg">#263238</color>
+    <color name="consoleText">#ECEFF1</color>
+</resources>
diff --git a/app/src/main/res/values/ids.xml b/app/src/main/res/values/ids.xml
new file mode 100644
index 0000000..a57ac43
--- /dev/null
+++ b/app/src/main/res/values/ids.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <item name="checkbox" type="id" />
+    <item name="appName" type="id" />
+</resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
new file mode 100644
index 0000000..423a6cf
--- /dev/null
+++ b/app/src/main/res/values/strings.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">Android 备份工具</string>
+    <string name="script_label">选择脚本</string>
+    <string name="param_label">脚本参数</string>
+    <string name="param_hint">输入命令行参数</string>
+    <string name="run_button">▶ 执行</string>
+    <string name="stop_button">■ 停止</string>
+    <string name="clear_button">清空输出</string>
+    <string name="root_toggle">Root 权限</string>
+    <string name="status_ready">就绪</string>
+    <string name="status_running">执行中…</string>
+    <string name="status_done">完成 (退出码: %d)</string>
+    <string name="status_error">执行失败: %s</string>
+    <string name="status_cancelled">已取消</string>
+</resources>
diff --git a/app/src/main/res/values/themes.xml b/app/src/main/res/values/themes.xml
new file mode 100644
index 0000000..9583a80
--- /dev/null
+++ b/app/src/main/res/values/themes.xml
@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="AppTheme" parent="Theme.Material3.DayNight.NoActionBar">
+        <!-- Primary -->
+        <item name="colorPrimary">@color/primary</item>
+        <item name="colorOnPrimary">@color/onPrimary</item>
+        <item name="colorPrimaryContainer">@color/primaryContainer</item>
+        <item name="colorOnPrimaryContainer">@color/onPrimaryContainer</item>
+        <item name="colorPrimaryInverse">@color/inverseSurface</item>
+
+        <!-- Secondary -->
+        <item name="colorSecondary">@color/secondary</item>
+        <item name="colorOnSecondary">@color/onSecondary</item>
+        <item name="colorSecondaryContainer">@color/secondaryContainer</item>
+        <item name="colorOnSecondaryContainer">@color/onSecondaryContainer</item>
+
+        <!-- Tertiary -->
+        <item name="colorTertiary">@color/tertiary</item>
+        <item name="colorOnTertiary">@color/onTertiary</item>
+        <item name="colorTertiaryContainer">@color/tertiaryContainer</item>
+        <item name="colorOnTertiaryContainer">@color/onTertiaryContainer</item>
+
+        <!-- Error -->
+        <item name="colorError">@color/error</item>
+        <item name="colorOnError">@color/onError</item>
+        <item name="colorErrorContainer">@color/errorContainer</item>
+        <item name="colorOnErrorContainer">@color/onErrorContainer</item>
+
+        <!-- Surface / Background -->
+        <item name="android:colorBackground">@color/background</item>
+        <item name="colorOnBackground">@color/onBackground</item>
+        <item name="colorSurface">@color/surface</item>
+        <item name="colorOnSurface">@color/onSurface</item>
+        <item name="colorSurfaceVariant">@color/surfaceVariant</item>
+        <item name="colorOnSurfaceVariant">@color/onSurfaceVariant</item>
+        <item name="colorSurfaceInverse">@color/inverseSurface</item>
+        <item name="colorOnSurfaceInverse">@color/inverseOnSurface</item>
+
+        <!-- Outline -->
+        <item name="colorOutline">@color/outline</item>
+        <item name="colorOutlineVariant">@color/outlineVariant</item>
+
+        <!-- Surface container hierarchy -->
+        <item name="colorSurfaceContainerLowest">@color/surfaceContainerLowest</item>
+        <item name="colorSurfaceContainerLow">@color/surfaceContainerLow</item>
+        <item name="colorSurfaceContainer">@color/surfaceContainer</item>
+        <item name="colorSurfaceContainerHigh">@color/surfaceContainerHigh</item>
+        <item name="colorSurfaceContainerHighest">@color/surfaceContainerHighest</item>
+
+        <!-- Status bar -->
+        <item name="android:statusBarColor">@android:color/transparent</item>
+        <item name="android:navigationBarColor">@android:color/transparent</item>
+        <item name="android:windowLightStatusBar">true</item>
+    </style>
+</resources>
diff --git a/gradle.properties b/gradle.properties
new file mode 100644
index 0000000..1d0e159
--- /dev/null
+++ b/gradle.properties
@@ -0,0 +1,3 @@
+android.useAndroidX=true
+android.enableJetifier=false
+org.gradle.jvmargs=-Xmx2048m
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..955e786
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..62f495d
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.2-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..17a9170
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,176 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+if $JAVACMD --add-opens java.base/java.lang=ALL-UNNAMED -version ; then
+    DEFAULT_JVM_OPTS="--add-opens java.base/java.lang=ALL-UNNAMED $DEFAULT_JVM_OPTS"
+fi
+
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"
diff --git a/scripts/README.md b/scripts/README.md
deleted file mode 100644
index a2189b6..0000000
--- a/scripts/README.md
+++ /dev/null
@@ -1,2 +0,0 @@
-# 该目录用于存放将要在 Android 端执行的 shell 脚本
-# 请将 backup_script/tools.sh 复制到此目录下，并确保脚本有可执行权限