feat: make erase real (zero the drive's partition structures)

.editorconfig

@@ -0,0 +1,20 @@
+# Kotlin official code style (matches kotlin.code.style=official in gradle.properties)
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{kt,kts}]
+indent_size = 4
+indent_style = space
+max_line_length = 120
+
+[*.{xml,yml,yaml}]
+indent_size = 4
+indent_style = space
+
+[*.md]
+trim_trailing_whitespace = false

.github/workflows/android.yml

@@ -0,0 +1,28 @@
+name: Android CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: android
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 21
+      - uses: gradle/actions/setup-gradle@v4
+      - name: Build and lint
+        run: ./gradlew assembleDebug lint
+      - name: Upload lint report
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: lint-report
+          path: android/app/build/reports/lint-results-debug.html

android/app/build.gradle.kts

@@ -1,11 +1,11 @@
 plugins {
     id("com.android.application")
-    id("org.jetbrains.kotlin.android")
+    id("org.jetbrains.kotlin.plugin.compose")
 }
 
 android {
     namespace = "com.google.chrome.recovery"
-    compileSdk = 36
+    compileSdk = 37
 
     defaultConfig {
         applicationId = "com.google.chrome.recovery"
@@ -30,18 +30,12 @@ android {
         }
     }
     compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_1_8
-        targetCompatibility = JavaVersion.VERSION_1_8
-    }
-    kotlinOptions {
-        jvmTarget = "1.8"
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
     }
     buildFeatures {
         compose = true
     }
-    composeOptions {
-        kotlinCompilerExtensionVersion = "1.5.8"
-    }
     packaging {
         resources {
             excludes += "/META-INF/{AL2.0,LGPL2.1}"
@@ -51,28 +45,43 @@ android {
 
 dependencies {
 
-    implementation("androidx.core:core-ktx:1.12.0")
-    implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.7.0")
-    implementation("androidx.activity:activity-compose:1.8.2")
-    implementation(platform("androidx.compose:compose-bom:2024.04.01"))
+    implementation("androidx.core:core-ktx:1.19.0")
+    implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.11.0")
+    implementation("androidx.lifecycle:lifecycle-runtime-compose:2.11.0")
+    implementation("androidx.lifecycle:lifecycle-viewmodel-compose:2.11.0")
+    implementation("androidx.activity:activity-compose:1.13.0")
+    implementation(platform("androidx.compose:compose-bom:2026.06.01"))
     implementation("androidx.compose.ui:ui")
     implementation("androidx.compose.ui:ui-graphics")
     implementation("androidx.compose.ui:ui-tooling-preview")
-    implementation("androidx.compose.material3:material3")
-
+    // Pinned past the BOM's 1.4.0: every Material 3 Expressive API (wavy progress,
+    // LoadingIndicator, MaterialExpressiveTheme, MaterialShapes) lives on the
+    // 1.5.0-alpha track — Expressive was removed from the 1.4 line at beta01.
+    implementation("androidx.compose.material3:material3:1.5.0-alpha23")
+    // material3 stopped depending on material-icons transitively in newer BOMs;
+    // the icons artifacts are frozen at 1.7.x and are no longer BOM-managed.
+    implementation("androidx.compose.material:material-icons-core:1.7.8")
+
     // Navigation
-    implementation("androidx.navigation:navigation-compose:2.7.7")
+    implementation("androidx.navigation:navigation-compose:2.9.8")
+
+    // Adaptive layouts (window size classes + list-detail pane scaffold).
+    // material3-adaptive-navigation-suite is deliberately absent: it exists for
+    // apps with top-level destinations (bar/rail/drawer); a linear wizard has none.
+    implementation("androidx.compose.material3.adaptive:adaptive:1.2.0")
+    implementation("androidx.compose.material3.adaptive:adaptive-layout:1.2.0")
+    implementation("androidx.compose.material3.adaptive:adaptive-navigation:1.2.0")
 
     // Coroutines
-    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-android:1.7.3")
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-android:1.11.0")
 
     // JSON Parsing (Gson or Kotlinx Serialization, let's use Gson for simplicity)
-    implementation("com.google.code.gson:gson:2.10.1")
+    implementation("com.google.code.gson:gson:2.14.0")
 
     testImplementation("junit:junit:4.13.2")
     androidTestImplementation("androidx.test.ext:junit:1.1.5")
     androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
-    androidTestImplementation(platform("androidx.compose:compose-bom:2024.04.01"))
+    androidTestImplementation(platform("androidx.compose:compose-bom:2026.06.01"))
     androidTestImplementation("androidx.compose.ui:ui-test-junit4")
     debugImplementation("androidx.compose.ui:ui-tooling")
     debugImplementation("androidx.compose.ui:ui-test-manifest")

android/app/src/main/AndroidManifest.xml

@@ -17,14 +17,12 @@
         android:icon="@mipmap/ic_launcher"
         android:label="Book Recovery"
         android:supportsRtl="true"
-        android:theme="@style/Theme.ChromebookRecovery"
-        android:usesCleartextTraffic="true">
+        android:theme="@style/Theme.ChromebookRecovery">
         <activity
             android:name=".MainActivity"
             android:exported="true"
             android:launchMode="singleTop"
             android:label="Book Recovery"
-            android:configChanges="keyboard|keyboardHidden|orientation|screenSize|screenLayout|smallestScreenSize|uiMode"
             android:theme="@style/Theme.ChromebookRecovery">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

android/app/src/main/java/com/google/chrome/recovery/data/RecoveryRepository.kt

@@ -3,6 +3,8 @@ package com.google.chrome.recovery.data
 import com.google.gson.Gson
 import com.google.gson.reflect.TypeToken
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
 import kotlinx.coroutines.withContext
 import java.io.InputStreamReader
 import java.net.HttpURLConnection
@@ -17,18 +19,42 @@ import java.net.URL
  * for the zipped `.bin` payloads.
  *
  * It aggregates both standard ChromeOS models and CloudReady (ChromeOS Flex) models.
+ *
+ * The manifest is fetched once per process and cached: several wizard screens
+ * (identify, model selection, channel selection, and the expanded-width detail
+ * pane) all need the same ~2,500-entry list, and previously each of them
+ * re-downloaded it. Access the repository through [RecoveryRepository.instance].
  */
-class RecoveryRepository {
+class RecoveryRepository private constructor() {
+
+    companion object {
+        /** Process-wide instance so every screen shares one cached manifest. */
+        val instance = RecoveryRepository()
+    }
 
     private val RECOVERY_URL = "https://dl.google.com/dl/edgedl/chromeos/recovery/recovery2.json"
     private val CLOUDREADY_URL = "https://dl.google.com/dl/edgedl/chromeos/recovery/cloudready_recovery2.json"
 
-    suspend fun fetchRecoveryImages(): List<RecoveryImage> = withContext(Dispatchers.IO) {
+    private val mutex = Mutex()
+    private var cached: List<RecoveryImage>? = null
+
+    suspend fun fetchRecoveryImages(): List<RecoveryImage> = mutex.withLock {
+        cached?.let { return@withLock it }
+        val images = fetchFromNetwork()
+        // An empty result means the fetch failed; don't cache it, so the next
+        // screen gets another chance once connectivity returns.
+        if (images.isNotEmpty()) {
+            cached = images
+        }
+        images
+    }
+
+    private suspend fun fetchFromNetwork(): List<RecoveryImage> = withContext(Dispatchers.IO) {
         val images = mutableListOf<RecoveryImage>()
         try {
             val listType = object : TypeToken<List<RecoveryImage>>() {}.type
             val gson = Gson()
-            
+
             // Fetch normal ChromeOS recovery
             val url = URL(RECOVERY_URL)
             val connection = url.openConnection() as HttpURLConnection