feat: add local hexagram content for offline reading

Load a versioned Wikisource jing plus project-authored plain drafts so results can show labeled original and vernacular texts without unauthorized modern translations.

Co-authored-by: Cursor <cursoragent@cursor.com>

.github/workflows/verify.yml

@@ -23,6 +23,10 @@ jobs:
         with:
           node-version: "22"
           package-manager-cache: false
+      - name: Set up Android SDK
+        uses: android-actions/setup-android@v3
+      - name: Install pinned Android SDK components
+        run: sdkmanager "platforms;android-34" "build-tools;34.0.0"
       - name: Set up Gradle
         uses: gradle/actions/setup-gradle@v6
       - name: Run local quality gates

.gitignore

@@ -4,6 +4,8 @@
 *.iml
 local.properties
 captures/
+hs_err_pid*.log
+replay_pid*.log
 
 # Signing material and local credentials must never enter the repository.
 *.jks

AGENTS.md

@@ -30,19 +30,19 @@ tools are unavailable or insufficient. State the fallback in the handoff.
 
 ## Current build boundary
 
-The repository uses `brainwave` only as a code name. Formal product name,
-organization-owned application ID, and final `minSdk` remain product decisions.
-Until they are accepted, the `app` project is a Kotlin/JVM domain harness, not a
-publishable Android application. Do not invent placeholder release identity.
+The repository keeps `brainwave` only as its code name. The accepted Android
+identity is product name `灵机`, namespace/application ID `net.opcapp.flash`, and
+`minSdk` 26. The `app` project is an installable Android application; the app icon
+and store assets remain product decisions and must not be silently finalized.
 
 ## Verification
 
 Run from the repository root:
 
 ```powershell
-.\gradlew.bat verifyLocal --offline
+.\gradlew.bat verifyLocal
 ```
 
-After the Android application plugin is configured, also run the Android gates
-listed in `docs/quality-gates.md`. Report skipped device or Android checks
-explicitly; do not imply they passed.
+`verifyLocal` includes Android lint, debug unit tests, APK assembly, repository
+checks, and dependency-license coverage. Run `connectedDebugAndroidTest` separately
+when an authorized device is present, and report skipped device checks explicitly.

app/build.gradle.kts

@@ -1,27 +1,121 @@
 import groovy.json.JsonSlurper
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
-    alias(libs.plugins.kotlin.jvm)
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.kotlin.android)
+    alias(libs.plugins.kotlin.kapt)
+    alias(libs.plugins.hilt)
+}
+
+android {
+    namespace = "net.opcapp.flash"
+    compileSdk = 34
+
+    defaultConfig {
+        applicationId = "net.opcapp.flash"
+        minSdk = 26
+        targetSdk = 34
+        versionCode = 1
+        versionName = "0.1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        vectorDrawables.useSupportLibrary = true
+
+        javaCompileOptions {
+            annotationProcessorOptions {
+                arguments += mapOf("room.schemaLocation" to "$projectDir/schemas")
+            }
+        }
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro",
+            )
+        }
+    }
+
+    buildFeatures {
+        compose = true
+        buildConfig = false
+    }
+
+    composeOptions {
+        kotlinCompilerExtensionVersion = libs.versions.composeCompiler.get()
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
+    packaging {
+        resources.excludes += "/META-INF/{AL2.0,LGPL2.1}"
+    }
+
+    sourceSets {
+        getByName("main").assets.srcDir(rootProject.file("content/packages"))
+        getByName("test").resources.srcDir(rootProject.file("content/packages"))
+    }
+
+    testOptions {
+        unitTests.isReturnDefaultValues = true
+    }
 }
 
 kotlin {
     jvmToolchain(17)
-
-    sourceSets {
-        main {
-            kotlin.srcDir("src/main/java")
-        }
-        test {
-            kotlin.srcDir("src/test/java")
-        }
-    }
 }
+
+kapt {
+    correctErrorTypes = true
+}
+
+tasks.withType<KotlinCompile>().configureEach {
+    kotlinOptions.jvmTarget = "17"
+}
+
 dependencies {
+    val composeBom = platform(libs.androidx.compose.bom)
+
+    implementation(libs.androidx.core.ktx)
+    implementation(libs.androidx.activity.compose)
+    implementation(libs.androidx.lifecycle.runtime.ktx)
+    implementation(libs.androidx.lifecycle.runtime.compose)
+    implementation(libs.androidx.lifecycle.viewmodel.compose)
+    implementation(composeBom)
+    implementation(libs.androidx.compose.ui)
+    implementation(libs.androidx.compose.ui.tooling.preview)
+    implementation(libs.androidx.compose.material3)
+    implementation(libs.androidx.navigation.compose)
+    implementation(libs.androidx.room.runtime)
+    implementation(libs.androidx.room.ktx)
+    kapt(libs.androidx.room.compiler)
+    implementation(libs.androidx.datastore.preferences)
+    implementation(libs.hilt.android)
+    kapt(libs.hilt.compiler)
+
     testImplementation(libs.junit)
+
+    androidTestImplementation(composeBom)
+    androidTestImplementation(libs.androidx.test.ext.junit)
+    androidTestImplementation(libs.androidx.test.runner)
+    androidTestImplementation(libs.androidx.compose.ui.test.junit4)
+    androidTestImplementation(libs.androidx.room.testing)
+
+    debugImplementation(libs.androidx.compose.ui.tooling)
+    debugImplementation(libs.androidx.compose.ui.test.manifest)
 }
 
-tasks.test {
+tasks.withType<Test>().configureEach {
     useJUnit()
+    maxParallelForks = 1
+    maxHeapSize = "192m"
+    jvmArgs("-XX:MaxMetaspaceSize=128m", "-XX:+UseSerialGC")
     testLogging {
         events("failed", "skipped")
         exceptionFormat = org.gradle.api.tasks.testing.logging.TestExceptionFormat.FULL
@@ -30,25 +124,48 @@ tasks.test {
 
 tasks.register("verifyDependencyLicenses") {
     group = "verification"
-    description = "Ensures every resolved JVM runtime/test artifact has a reviewed license entry."
+    description = "Ensures every resolved debug runtime/test artifact has a reviewed license entry."
 
     doLast {
         @Suppress("UNCHECKED_CAST")
         val manifest = JsonSlurper().parse(rootProject.file("config/dependency-licenses.json")) as Map<String, Any>
         @Suppress("UNCHECKED_CAST")
         val components = manifest.getValue("components") as List<Map<String, Any>>
+        @Suppress("UNCHECKED_CAST")
+        val groupPolicies = manifest.getValue("groupPolicies") as List<Map<String, Any>>
         val reviewedCoordinates = components.mapNotNull { it["coordinates"] as String? }.toSet()
-        val resolvedCoordinates = configurations.getByName("testRuntimeClasspath")
+        val resolvedCoordinates = listOf(
+            "debugRuntimeClasspath",
+            "debugUnitTestRuntimeClasspath",
+            "debugAndroidTestRuntimeClasspath",
+        )
+            .flatMap { configurationName ->
+                configurations.getByName(configurationName)
                     .resolvedConfiguration
                     .resolvedArtifacts
-            .map { artifact ->
+                    .mapNotNull { artifact ->
+                        if (artifact.id.componentIdentifier !is org.gradle.api.artifacts.component.ModuleComponentIdentifier) {
+                            return@mapNotNull null
+                        }
                         val id = artifact.moduleVersion.id
                         "${id.group}:${id.name}:${id.version}"
                     }
+            }
             .toSet()
-        val missing = resolvedCoordinates - reviewedCoordinates
+        val missing = resolvedCoordinates.filterNot { coordinates ->
+            if (coordinates in reviewedCoordinates) return@filterNot true
+            val group = coordinates.substringBefore(":")
+            groupPolicies.any { policy ->
+                val prefix = policy.getValue("groupPrefix") as String
+                group == prefix || group.startsWith("$prefix.")
+            }
+        }
         check(missing.isEmpty()) {
             "Dependencies missing reviewed license entries: ${missing.sorted().joinToString()}"
         }
+        logger.lifecycle(
+            "Dependency license coverage passed for ${resolvedCoordinates.size} artifacts " +
+                "with ${groupPolicies.size} reviewed group policies.",
+        )
     }
 }

app/proguard-rules.pro

@@ -0,0 +1 @@
+# Project-specific R8 rules will be added when release minification is enabled.

app/schemas/net.opcapp.flash.data.history.LingjiDatabase/1.json

@@ -0,0 +1,128 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 1,
+    "identityHash": "29d4064d6ad955275a848abef712ab97",
+    "entities": [
+      {
+        "tableName": "casting_sessions",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` TEXT NOT NULL, `created_at_epoch_millis` INTEGER NOT NULL, `created_at_text` TEXT NOT NULL, `method_version` TEXT NOT NULL, `content_version` TEXT NOT NULL, `coin_convention` TEXT NOT NULL, `rounds_json` TEXT NOT NULL, `line_values` TEXT NOT NULL, `primary_pattern` TEXT NOT NULL, `moving_positions` TEXT NOT NULL, `transformed_pattern` TEXT NOT NULL, `primary_hexagram_id` INTEGER NOT NULL, `transformed_hexagram_id` INTEGER NOT NULL, `question_text` TEXT, `question_saved` INTEGER NOT NULL, PRIMARY KEY(`id`))",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "createdAtEpochMillis",
+            "columnName": "created_at_epoch_millis",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "createdAtText",
+            "columnName": "created_at_text",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "methodVersion",
+            "columnName": "method_version",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "contentVersion",
+            "columnName": "content_version",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "coinConvention",
+            "columnName": "coin_convention",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "roundsJson",
+            "columnName": "rounds_json",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lineValues",
+            "columnName": "line_values",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "primaryPattern",
+            "columnName": "primary_pattern",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "movingPositions",
+            "columnName": "moving_positions",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "transformedPattern",
+            "columnName": "transformed_pattern",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "primaryHexagramId",
+            "columnName": "primary_hexagram_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "transformedHexagramId",
+            "columnName": "transformed_hexagram_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "questionText",
+            "columnName": "question_text",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "questionSaved",
+            "columnName": "question_saved",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_casting_sessions_created_at_epoch_millis",
+            "unique": false,
+            "columnNames": [
+              "created_at_epoch_millis"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_casting_sessions_created_at_epoch_millis` ON `${TABLE_NAME}` (`created_at_epoch_millis`)"
+          }
+        ],
+        "foreignKeys": []
+      }
+    ],
+    "views": [],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '29d4064d6ad955275a848abef712ab97')"
+    ]
+  }
+}

app/src/androidTest/java/net/opcapp/flash/app/MainActivityTest.kt

@@ -0,0 +1,141 @@
+package net.opcapp.flash.app
+
+import androidx.compose.ui.test.assertIsDisplayed
+import androidx.compose.ui.test.assertIsOff
+import androidx.compose.ui.test.assertIsOn
+import androidx.compose.ui.test.junit4.createAndroidComposeRule
+import androidx.compose.ui.test.onAllNodesWithTag
+import androidx.compose.ui.test.onAllNodesWithText
+import androidx.compose.ui.test.onNodeWithTag
+import androidx.compose.ui.test.onNodeWithText
+import androidx.compose.ui.test.onRoot
+import androidx.compose.ui.test.performClick
+import androidx.compose.ui.test.performScrollTo
+import androidx.compose.ui.test.performTextInput
+import androidx.compose.ui.test.printToString
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import dagger.hilt.android.EntryPointAccessors
+import kotlinx.coroutines.runBlocking
+import net.opcapp.flash.data.di.DebugPersistenceEntryPoint
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class MainActivityTest {
+    @get:Rule
+    val composeRule = createAndroidComposeRule<MainActivity>()
+
+    @Before
+    fun resetLocalData() = runBlocking {
+        val dependencies = testDependencies()
+        dependencies.database().clearAllTables()
+        dependencies.settings().setHasSeenMethodIntro(true)
+        dependencies.settings().setAutoSaveHistory(true)
+        dependencies.settings().setSaveQuestionText(true)
+        dependencies.settings().setSaveExplanationContent(true)
+        dependencies.settings().setSaveActionNote(true)
+    }
+
+    @Test
+    fun completeCastingIsCalculatedAndSavedLocally() {
+        openHome()
+        composeRule.onNodeWithText("灵机").assertIsDisplayed()
+        composeRule.onNodeWithText("开始一问").performClick()
+        composeRule.onNodeWithTag("question_input").performTextInput("我该先验证哪个假设？")
+        composeRule.onNodeWithText("开始录入铜币").performClick()
+
+        selectRound(characterIndices = emptySet())
+        repeat(5) { selectRound(characterIndices = setOf(0)) }
+
+        composeRule.onNodeWithText("复 24 → 坤 2").assertIsDisplayed()
+        composeRule.onNodeWithText("动爻：初爻").assertIsDisplayed()
+        composeRule.waitUntil(timeoutMillis = 5_000) {
+            composeRule.onAllNodesWithText("已自动保存完整记录到本机")
+                .fetchSemanticsNodes().isNotEmpty()
+        }
+        composeRule.onNodeWithTag("do_not_save_this_time").performScrollTo().performClick()
+        composeRule.waitUntil(timeoutMillis = 5_000) {
+            composeRule.onAllNodesWithTag("confirm_delete_record")
+                .fetchSemanticsNodes().isNotEmpty()
+        }
+        composeRule.onNodeWithTag("confirm_delete_record").performScrollTo().performClick()
+        try {
+            composeRule.waitUntil(timeoutMillis = 15_000) {
+                composeRule.onAllNodesWithText("本次尚未保存").fetchSemanticsNodes().isNotEmpty() ||
+                    composeRule.onAllNodesWithText("删除失败，请重试").fetchSemanticsNodes().isNotEmpty()
+            }
+        } catch (error: Throwable) {
+            throw AssertionError(composeRule.onRoot().printToString(), error)
+        }
+        composeRule.onNodeWithText("本次尚未保存").assertIsDisplayed()
+    }
+
+    @Test
+    fun autoSaveSettingIsRealAndReflectedOnHome() {
+        openHome()
+        composeRule.onNodeWithText("管理保存设置").performClick()
+        composeRule.waitUntil(timeoutMillis = 5_000) {
+            composeRule.onAllNodesWithTag("auto_save_history").fetchSemanticsNodes().isNotEmpty()
+        }
+        composeRule.onNodeWithTag("auto_save_history").assertIsOn().performClick()
+        composeRule.waitUntil(timeoutMillis = 5_000) {
+            runCatching {
+                composeRule.onNodeWithTag("auto_save_history").assertIsOff()
+                true
+            }.getOrDefault(false)
+        }
+        composeRule.onNodeWithText("返回").performClick()
+        composeRule.waitUntil(timeoutMillis = 5_000) {
+            composeRule.onAllNodesWithText("自动保存完整记录：已关闭").fetchSemanticsNodes().isNotEmpty()
+        }
+        composeRule.onNodeWithText("自动保存完整记录：已关闭").assertIsDisplayed()
+
+        composeRule.onNodeWithText("管理保存设置").performClick()
+        composeRule.waitUntil(timeoutMillis = 5_000) {
+            composeRule.onAllNodesWithTag("auto_save_history").fetchSemanticsNodes().isNotEmpty()
+        }
+        composeRule.onNodeWithTag("auto_save_history").performClick()
+        composeRule.waitUntil(timeoutMillis = 5_000) {
+            runCatching {
+                composeRule.onNodeWithTag("auto_save_history").assertIsOn()
+                true
+            }.getOrDefault(false)
+        }
+    }
+
+    @Test
+    fun methodIntroRemainsAvailableFromHome() {
+        openHome()
+        composeRule.onNodeWithText("方法说明").performClick()
+        composeRule.onNodeWithText("你投币，应用记录；AI 不参与起卦。").assertIsDisplayed()
+        composeRule.onNodeWithText("字为 2，背为 3；第一次是初爻，由下而上。").assertIsDisplayed()
+        composeRule.onNodeWithTag("method_intro_continue").performClick()
+        composeRule.onNodeWithText("开始一问").assertIsDisplayed()
+    }
+
+    private fun openHome() {
+        composeRule.waitUntil(timeoutMillis = 5_000) {
+            composeRule.onAllNodesWithText("开始一问").fetchSemanticsNodes().isNotEmpty() ||
+                composeRule.onAllNodesWithTag("method_intro_continue").fetchSemanticsNodes().isNotEmpty()
+        }
+        if (composeRule.onAllNodesWithTag("method_intro_continue").fetchSemanticsNodes().isNotEmpty()) {
+            composeRule.onNodeWithTag("method_intro_continue").performClick()
+        }
+        composeRule.onNodeWithText("开始一问").assertIsDisplayed()
+    }
+
+    private fun selectRound(characterIndices: Set<Int>) {
+        repeat(3) { index ->
+            val side = if (index in characterIndices) "character" else "reverse"
+            composeRule.onNodeWithTag("coin_${index}_$side").performClick()
+        }
+        composeRule.onNodeWithTag("confirm_round").performClick()
+    }
+
+    private fun testDependencies(): DebugPersistenceEntryPoint = EntryPointAccessors.fromApplication(
+        composeRule.activity.applicationContext,
+        DebugPersistenceEntryPoint::class.java,
+    )
+}

app/src/androidTest/java/net/opcapp/flash/data/history/LingjiDatabaseTest.kt

@@ -0,0 +1,78 @@
+package net.opcapp.flash.data.history
+
+import android.content.Context
+import androidx.room.Room
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.runBlocking
+import net.opcapp.flash.data.settings.HistorySavePolicy
+import net.opcapp.flash.domain.casting.CastEngine
+import net.opcapp.flash.domain.casting.CastMetadata
+import net.opcapp.flash.domain.casting.CastResult
+import net.opcapp.flash.domain.casting.CastRound
+import net.opcapp.flash.domain.casting.LineValue
+import org.junit.After
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertNotNull
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class LingjiDatabaseTest {
+    private lateinit var database: LingjiDatabase
+    private lateinit var repository: RoomHistoryRepository
+
+    @Before
+    fun createDatabase() {
+        val context = ApplicationProvider.getApplicationContext<Context>()
+        database = Room.inMemoryDatabaseBuilder(context, LingjiDatabase::class.java).build()
+        repository = RoomHistoryRepository(database, database.castingSessionDao())
+    }
+
+    @After
+    fun closeDatabase() {
+        database.close()
+    }
+
+    @Test
+    fun completedSessionCanBeSavedReadAndDeleted() = runBlocking {
+        val result = fixtureResult()
+        repository.saveSession(
+            id = "room-fixture",
+            result = result,
+            questionText = "我该先验证哪个假设？",
+            policy = HistorySavePolicy(),
+        )
+
+        val restored = repository.findById("room-fixture")
+
+        assertNotNull(restored)
+        assertEquals(result, restored?.result)
+        assertEquals("我该先验证哪个假设？", restored?.questionText)
+        assertEquals(1, repository.observeCount().first())
+        assertEquals(24, repository.observeLatest().first()?.primaryHexagramId)
+
+        assertEquals(true, repository.deleteById("room-fixture"))
+        assertFalse(repository.exists("room-fixture"))
+    }
+
+    private fun fixtureResult(): CastResult = CastResult.record(
+        computation = CastEngine.cast(
+            listOf(
+                CastRound.fromLineValue(LineValue.OLD_YANG),
+                CastRound.fromLineValue(LineValue.YOUNG_YIN),
+                CastRound.fromLineValue(LineValue.YOUNG_YIN),
+                CastRound.fromLineValue(LineValue.YOUNG_YIN),
+                CastRound.fromLineValue(LineValue.YOUNG_YIN),
+                CastRound.fromLineValue(LineValue.YOUNG_YIN),
+            ),
+        ),
+        metadata = CastMetadata(
+            contentVersion = "hexagram-names-v1",
+            createdAt = "2026-08-08T00:00:00Z",
+        ),
+    )
+}

app/src/debug/java/net/opcapp/flash/data/di/DebugPersistenceEntryPoint.kt

@@ -0,0 +1,15 @@
+package net.opcapp.flash.data.di
+
+import dagger.hilt.EntryPoint
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import net.opcapp.flash.data.history.LingjiDatabase
+import net.opcapp.flash.data.settings.HistorySettingsRepository
+
+@EntryPoint
+@InstallIn(SingletonComponent::class)
+interface DebugPersistenceEntryPoint {
+    fun database(): LingjiDatabase
+
+    fun settings(): HistorySettingsRepository
+}

app/src/main/AndroidManifest.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <application
+        android:name=".app.LingjiApplication"
+        android:allowBackup="false"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Lingji"
+        android:usesCleartextTraffic="false">
+        <activity
+            android:name=".app.MainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/net/opcapp/flash/app/LingjiApp.kt

@@ -0,0 +1,140 @@
+package net.opcapp.flash.app
+
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.navigation.NavHostController
+import androidx.navigation.compose.NavHost
+import androidx.navigation.compose.composable
+import androidx.navigation.compose.rememberNavController
+import net.opcapp.flash.feature.casting.CastingScreen
+import net.opcapp.flash.feature.casting.CastingViewModel
+import net.opcapp.flash.feature.content.ContentSourcesScreen
+import net.opcapp.flash.feature.home.HomeScreen
+import net.opcapp.flash.feature.home.HomeViewModel
+import net.opcapp.flash.feature.onboarding.MethodIntroScreen
+import net.opcapp.flash.feature.question.QuestionScreen
+import net.opcapp.flash.feature.result.CastResultScreen
+import net.opcapp.flash.feature.settings.HistorySettingsScreen
+import net.opcapp.flash.feature.settings.HistorySettingsViewModel
+
+private object Destination {
+    const val Welcome = "welcome"
+    const val Home = "home"
+    const val Question = "question"
+    const val Casting = "casting"
+    const val Result = "result"
+    const val Settings = "settings"
+    const val Sources = "sources"
+}
+
+@Composable
+fun LingjiApp(
+    castingViewModel: CastingViewModel,
+    homeViewModel: HomeViewModel,
+    settingsViewModel: HistorySettingsViewModel,
+    navController: NavHostController = rememberNavController(),
+) {
+    val castingState = castingViewModel.uiState.collectAsStateWithLifecycle().value
+    val homeState = homeViewModel.uiState.collectAsStateWithLifecycle().value
+    val savePolicy = settingsViewModel.policy.collectAsStateWithLifecycle().value
+
+    if (!homeState.isReady) {
+        Surface(
+            modifier = Modifier.fillMaxSize(),
+            color = MaterialTheme.colorScheme.background,
+        ) {}
+        return
+    }
+
+    NavHost(
+        navController = navController,
+        startDestination = if (homeState.hasSeenMethodIntro) {
+            Destination.Home
+        } else {
+            Destination.Welcome
+        },
+    ) {
+        composable(Destination.Welcome) {
+            MethodIntroScreen(
+                showBack = navController.previousBackStackEntry != null,
+                onContinue = {
+                    homeViewModel.markMethodIntroSeen()
+                    navController.navigate(Destination.Home) {
+                        popUpTo(Destination.Welcome) { inclusive = true }
+                        launchSingleTop = true
+                    }
+                },
+                onBack = { navController.popBackStack() },
+            )
+        }
+        composable(Destination.Home) {
+            HomeScreen(
+                uiState = homeState,
+                onStartCasting = {
+                    castingViewModel.startNewSession()
+                    navController.navigate(Destination.Question)
+                },
+                onOpenSettings = { navController.navigate(Destination.Settings) },
+                onOpenMethodIntro = { navController.navigate(Destination.Welcome) },
+                onOpenContentSources = { navController.navigate(Destination.Sources) },
+            )
+        }
+        composable(Destination.Question) {
+            QuestionScreen(
+                question = castingState.question,
+                onQuestionChanged = castingViewModel::updateQuestion,
+                onContinue = { navController.navigate(Destination.Casting) },
+                onBack = navController::popBackStack,
+            )
+        }
+        composable(Destination.Casting) {
+            CastingScreen(
+                uiState = castingState,
+                onSelectCoin = castingViewModel::selectCoin,
+                onConfirmRound = {
+                    if (castingViewModel.confirmCurrentRound()) {
+                        navController.navigate(Destination.Result)
+                    }
+                },
+                onEditRound = castingViewModel::editFrom,
+                onBack = navController::popBackStack,
+            )
+        }
+        composable(Destination.Result) {
+            CastResultScreen(
+                uiState = castingState,
+                onBackHome = { navController.popBackStack(Destination.Home, inclusive = false) },
+                onStartAgain = {
+                    castingViewModel.startNewSession()
+                    navController.navigate(Destination.Question) {
+                        popUpTo(Destination.Home)
+                        launchSingleTop = true
+                    }
+                },
+                onSave = castingViewModel::saveManually,
+                onDelete = castingViewModel::deleteSavedSession,
+                onRetry = castingViewModel::retryLastPersistenceOperation,
+            )
+        }
+        composable(Destination.Settings) {
+            HistorySettingsScreen(
+                policy = savePolicy,
+                onAutoSaveChanged = settingsViewModel::setAutoSaveHistory,
+                onSaveQuestionChanged = settingsViewModel::setSaveQuestionText,
+                onSaveExplanationChanged = settingsViewModel::setSaveExplanationContent,
+                onSaveActionChanged = settingsViewModel::setSaveActionNote,
+                onBack = navController::popBackStack,
+            )
+        }
+        composable(Destination.Sources) {
+            ContentSourcesScreen(
+                manifest = homeState.contentManifest,
+                onBack = navController::popBackStack,
+            )
+        }
+    }
+}

app/src/main/java/net/opcapp/flash/app/LingjiApplication.kt

@@ -0,0 +1,7 @@
+package net.opcapp.flash.app
+
+import android.app.Application
+import dagger.hilt.android.HiltAndroidApp
+
+@HiltAndroidApp
+class LingjiApplication : Application()

app/src/main/java/net/opcapp/flash/app/MainActivity.kt

@@ -0,0 +1,31 @@
+package net.opcapp.flash.app
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.viewModels
+import dagger.hilt.android.AndroidEntryPoint
+import net.opcapp.flash.core.designsystem.LingjiTheme
+import net.opcapp.flash.feature.casting.CastingViewModel
+import net.opcapp.flash.feature.home.HomeViewModel
+import net.opcapp.flash.feature.settings.HistorySettingsViewModel
+
+@AndroidEntryPoint
+class MainActivity : ComponentActivity() {
+    private val castingViewModel: CastingViewModel by viewModels()
+    private val homeViewModel: HomeViewModel by viewModels()
+    private val settingsViewModel: HistorySettingsViewModel by viewModels()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContent {
+            LingjiTheme {
+                LingjiApp(
+                    castingViewModel = castingViewModel,
+                    homeViewModel = homeViewModel,
+                    settingsViewModel = settingsViewModel,
+                )
+            }
+        }
+    }
+}

app/src/main/java/net/opcapp/flash/core/designsystem/LingjiTheme.kt

@@ -0,0 +1,84 @@
+package net.opcapp.flash.core.designsystem
+
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Typography
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.material3.lightColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+
+private val Paper = Color(0xFFF5F0E6)
+private val RaisedPaper = Color(0xFFFFFBF3)
+private val Ink = Color(0xFF26231F)
+private val MutedInk = Color(0xFF665F55)
+private val Cinnabar = Color(0xFFA33A2B)
+private val DarkPaper = Color(0xFF1E1B18)
+private val DarkRaisedPaper = Color(0xFF292520)
+private val PaleInk = Color(0xFFEAE2D5)
+private val PaleCinnabar = Color(0xFFFFB4A5)
+
+private val LightColors = lightColorScheme(
+    primary = Cinnabar,
+    onPrimary = Color.White,
+    primaryContainer = Color(0xFFF4DAD3),
+    onPrimaryContainer = Color(0xFF3D0902),
+    background = Paper,
+    onBackground = Ink,
+    surface = RaisedPaper,
+    onSurface = Ink,
+    surfaceVariant = Color(0xFFE8E0D3),
+    onSurfaceVariant = MutedInk,
+    outline = Color(0xFF81786C),
+)
+
+private val DarkColors = darkColorScheme(
+    primary = PaleCinnabar,
+    onPrimary = Color(0xFF5F160C),
+    primaryContainer = Color(0xFF7F261A),
+    onPrimaryContainer = Color(0xFFFFDAD2),
+    background = DarkPaper,
+    onBackground = PaleInk,
+    surface = DarkRaisedPaper,
+    onSurface = PaleInk,
+    surfaceVariant = Color(0xFF4C453D),
+    onSurfaceVariant = Color(0xFFD1C6B8),
+    outline = Color(0xFF9C9184),
+)
+
+private val LingjiTypography = Typography().let { defaults ->
+    defaults.copy(
+        displaySmall = defaults.displaySmall.copy(
+            fontFamily = FontFamily.Serif,
+            fontWeight = FontWeight.SemiBold,
+        ),
+        headlineMedium = defaults.headlineMedium.copy(
+            fontFamily = FontFamily.Serif,
+            fontWeight = FontWeight.Medium,
+        ),
+        titleLarge = defaults.titleLarge.copy(
+            fontFamily = FontFamily.Serif,
+            fontWeight = FontWeight.Medium,
+        ),
+        bodyLarge = defaults.bodyLarge.copy(fontFamily = FontFamily.SansSerif),
+        bodyMedium = defaults.bodyMedium.copy(fontFamily = FontFamily.SansSerif),
+        labelLarge = defaults.labelLarge.copy(
+            fontFamily = FontFamily.SansSerif,
+            fontWeight = FontWeight.SemiBold,
+        ),
+    )
+}
+
+@Composable
+fun LingjiTheme(
+    darkTheme: Boolean = isSystemInDarkTheme(),
+    content: @Composable () -> Unit,
+) {
+    MaterialTheme(
+        colorScheme = if (darkTheme) DarkColors else LightColors,
+        typography = LingjiTypography,
+        content = content,
+    )
+}

app/src/main/java/net/opcapp/flash/core/model/ContentSource.kt

@@ -0,0 +1,34 @@
+package net.opcapp.flash.core.model
+
+data class ContentSource(
+    val id: String,
+    val title: String,
+    val edition: String,
+    val license: String,
+    val url: String,
+) {
+    init {
+        require(id.isNotBlank()) { "Source id must not be blank" }
+        require(title.isNotBlank()) { "Source title must not be blank" }
+        require(edition.isNotBlank()) { "Source edition must not be blank" }
+        require(license.isNotBlank()) { "Source license must not be blank" }
+        require(url.isNotBlank()) { "Source url must not be blank" }
+    }
+}
+
+data class ContentManifest(
+    val contentVersion: String,
+    val digest: String,
+    val sources: List<ContentSource>,
+    val loadError: String? = null,
+) {
+    init {
+        require(contentVersion.isNotBlank()) { "Content version must not be blank" }
+        require(loadError == null || loadError.isNotBlank()) {
+            "Content load error must be non-blank or null"
+        }
+        require(sources.map(ContentSource::id).distinct().size == sources.size) {
+            "Content sources must have unique ids"
+        }
+    }
+}

app/src/main/java/net/opcapp/flash/core/model/HexagramContent.kt

@@ -1,4 +1,4 @@
-package brainwave.core.model
+package net.opcapp.flash.core.model
 
 data class HexagramContent(
     val kingWenNumber: Int,

app/src/main/java/net/opcapp/flash/core/model/HexagramNames.kt

@@ -0,0 +1,24 @@
+package net.opcapp.flash.core.model
+
+import net.opcapp.flash.domain.casting.HexagramId
+
+object HexagramNames {
+    private val names = listOf(
+        "乾", "坤", "屯", "蒙", "需", "讼", "师", "比",
+        "小畜", "履", "泰", "否", "同人", "大有", "谦", "豫",
+        "随", "蛊", "临", "观", "噬嗑", "贲", "剥", "复",
+        "无妄", "大畜", "颐", "大过", "坎", "离", "咸", "恒",
+        "遁", "大壮", "晋", "明夷", "家人", "睽", "蹇", "解",
+        "损", "益", "夬", "姤", "萃", "升", "困", "井",
+        "革", "鼎", "震", "艮", "渐", "归妹", "丰", "旅",
+        "巽", "兑", "涣", "节", "中孚", "小过", "既济", "未济",
+    )
+
+    init {
+        check(names.size == 64) { "Hexagram name table must contain 64 names" }
+    }
+
+    fun nameFor(id: HexagramId): String = names[id.value - 1]
+
+    fun nameFor(id: Int): String = nameFor(HexagramId(id))
+}

app/src/main/java/net/opcapp/flash/data/content/AssetsHexagramContentRepository.kt

@@ -0,0 +1,55 @@
+package net.opcapp.flash.data.content
+
+import android.content.Context
+import dagger.hilt.android.qualifiers.ApplicationContext
+import javax.inject.Inject
+import javax.inject.Singleton
+import net.opcapp.flash.core.model.ContentManifest
+import net.opcapp.flash.core.model.HexagramContent
+
+@Singleton
+class AssetsHexagramContentRepository @Inject constructor(
+    @ApplicationContext context: Context,
+) : HexagramContentRepository {
+    private val parsed: Result<ParsedHexagramContentPackage> by lazy {
+        runCatching {
+            context.assets.open(ASSET_NAME).bufferedReader(Charsets.UTF_8).use { reader ->
+                HexagramContentParser.parse(reader.readText())
+            }
+        }
+    }
+
+    override val contentVersion: String
+        get() = parsed.getOrNull()?.manifest?.contentVersion ?: UNAVAILABLE_VERSION
+
+    override val manifest: ContentManifest
+        get() = parsed.getOrNull()?.manifest ?: ContentManifest(
+            contentVersion = UNAVAILABLE_VERSION,
+            digest = "unavailable",
+            sources = emptyList(),
+            loadError = parsed.exceptionOrNull()?.message ?: "Content package could not be loaded",
+        )
+
+    override fun contentFor(
+        kingWenNumber: Int,
+        requestedContentVersion: String,
+    ): HexagramContent {
+        val pack = parsed.getOrElse { error ->
+            throw ContentIntegrityException(
+                error.message ?: "Content package failed integrity checks",
+            )
+        }
+        if (requestedContentVersion != pack.manifest.contentVersion) {
+            throw ContentIntegrityException(
+                "Requested content version '$requestedContentVersion' is unavailable; loaded '${pack.manifest.contentVersion}'",
+            )
+        }
+        return pack.hexagrams[kingWenNumber]
+            ?: throw ContentIntegrityException("No validated content for King Wen number $kingWenNumber")
+    }
+
+    companion object {
+        const val ASSET_NAME = "hexagram-content.json"
+        const val UNAVAILABLE_VERSION = "unavailable"
+    }
+}

app/src/main/java/net/opcapp/flash/data/content/HexagramContentParser.kt

@@ -0,0 +1,340 @@
+package net.opcapp.flash.data.content
+
+import net.opcapp.flash.core.model.ContentManifest
+import net.opcapp.flash.core.model.ContentSource
+import net.opcapp.flash.core.model.HexagramContent
+import net.opcapp.flash.core.model.HexagramNames
+import net.opcapp.flash.domain.casting.HexagramCatalog
+import net.opcapp.flash.domain.casting.HexagramPattern
+import net.opcapp.flash.domain.casting.Polarity
+
+data class ParsedHexagramContentPackage(
+    val manifest: ContentManifest,
+    val hexagrams: Map<Int, HexagramContent>,
+)
+
+object HexagramContentParser {
+    private val unsafeText =
+        Regex("(?:<\\s*script\\b|javascript\\s*:|\\bon\\w+\\s*=|[\\u0000-\\u0008\\u000b\\u000c\\u000e-\\u001f\\u007f-\\u009f])")
+
+    fun parse(json: String): ParsedHexagramContentPackage {
+        val root = try {
+            JsonReader(json).readValue() as? JsonValue.Obj
+                ?: throw ContentIntegrityException("Content package must be a JSON object")
+        } catch (error: ContentIntegrityException) {
+            throw error
+        } catch (error: IllegalStateException) {
+            throw ContentIntegrityException(error.message ?: "Content package JSON is invalid")
+        }
+        val errors = mutableListOf<String>()
+
+        val schemaVersion = root.int("schemaVersion", errors)
+        if (schemaVersion != 1) errors += "schemaVersion must be 1"
+        val contentVersion = root.text("contentVersion", errors)
+
+        val usage = root.obj("specialUsageTexts", errors)
+        val qianUsage = usage?.bool("qian", errors)
+        val kunUsage = usage?.bool("kun", errors)
+
+        val sourceNodes = root.arr("sources", errors)
+        val sources = mutableListOf<ContentSource>()
+        val sourceIds = mutableSetOf<String>()
+        sourceNodes?.forEachIndexed { index, node ->
+            val prefix = "sources[$index]"
+            val obj = node as? JsonValue.Obj
+            if (obj == null) {
+                errors += "$prefix must be an object"
+                return@forEachIndexed
+            }
+            val id = obj.text("id", errors, prefix)
+            val title = obj.text("title", errors, prefix)
+            val edition = obj.text("edition", errors, prefix)
+            val license = obj.text("license", errors, prefix)
+            val url = obj.text("url", errors, prefix)
+            if (id != null && !sourceIds.add(id)) errors += "$prefix.id must be unique"
+            if (url != null && !isHttpUrl(url)) errors += "$prefix.url must be an absolute HTTP(S) URL"
+            if (id != null && title != null && edition != null && license != null && url != null) {
+                sources += ContentSource(id, title, edition, license, url)
+            }
+        }
+        if (sourceNodes != null && sourceNodes.isEmpty()) {
+            errors += "sources must contain at least one licensed source"
+        }
+
+        val hexagramNodes = root.arr("hexagrams", errors)
+        if (hexagramNodes != null && hexagramNodes.size != 64) {
+            errors += "hexagrams must contain exactly 64 entries"
+        }
+        val hexagrams = mutableMapOf<Int, HexagramContent>()
+        val seenPatterns = mutableSetOf<String>()
+        hexagramNodes?.forEachIndexed { index, node ->
+            val prefix = "hexagrams[$index]"
+            val obj = node as? JsonValue.Obj
+            if (obj == null) {
+                errors += "$prefix must be an object"
+                return@forEachIndexed
+            }
+            val kingWenNumber = obj.int("kingWenNumber", errors, prefix)
+            val name = obj.text("name", errors, prefix)
+            val symbol = obj.text("symbol", errors, prefix)
+            val judgmentOriginal = obj.text("judgmentOriginal", errors, prefix)
+            val judgmentPlain = obj.text("judgmentPlain", errors, prefix)
+            val lineTexts = obj.sixTexts("lineTextsBottomUp", errors, prefix)
+            val linePlain = obj.sixTexts("linePlainBottomUp", errors, prefix)
+            val sourceRefs = obj.stringList("sourceRefs", errors, prefix)
+            val specialUsage = obj.optionalText("specialUsageText", errors, prefix)
+            val lower = obj.text("lowerTrigram", errors, prefix)
+            val upper = obj.text("upperTrigram", errors, prefix)
+            val patternTokens = obj.stringList("patternBottomUp", errors, prefix)
+
+            if (kingWenNumber != null && (kingWenNumber < 1 || kingWenNumber > 64)) {
+                errors += "$prefix.kingWenNumber must be an integer from 1 through 64"
+            }
+            if (kingWenNumber != null && hexagrams.containsKey(kingWenNumber)) {
+                errors += "$prefix.kingWenNumber must be unique"
+            }
+            if (kingWenNumber != null && name != null && name != HexagramNames.nameFor(kingWenNumber)) {
+                errors += "$prefix.name does not match the King Wen name table"
+            }
+            if (kingWenNumber != null && symbol != null && symbol != hexagramSymbol(kingWenNumber)) {
+                errors += "$prefix.symbol must be the King Wen unicode hexagram"
+            }
+            if (sourceRefs != null) {
+                if (sourceRefs.isEmpty()) errors += "$prefix.sourceRefs must not be empty"
+                if (sourceRefs.size != sourceRefs.distinct().size) {
+                    errors += "$prefix.sourceRefs must be unique"
+                }
+                for (sourceRef in sourceRefs) {
+                    if (sourceRef !in sourceIds) {
+                        errors += "$prefix.sourceRefs contains unknown source '$sourceRef'"
+                    }
+                }
+            }
+            if (patternTokens != null) {
+                if (patternTokens.size != 6 || patternTokens.any { it != "YIN" && it != "YANG" }) {
+                    errors += "$prefix.patternBottomUp must contain exactly six YIN/YANG values"
+                } else {
+                    val encoded = patternTokens.joinToString("/")
+                    if (!seenPatterns.add(encoded)) errors += "$prefix.patternBottomUp must be unique"
+                    val polarities = patternTokens.map { token ->
+                        if (token == "YANG") Polarity.YANG else Polarity.YIN
+                    }
+                    val expectedId = HexagramCatalog.idFor(HexagramPattern.of(polarities)).value
+                    if (kingWenNumber != null && kingWenNumber != expectedId) {
+                        errors += "$prefix.kingWenNumber does not match its King Wen trigram pair"
+                    }
+                    val expectedPattern = expectedBottomUp(lower, upper)
+                    if (expectedPattern != null && expectedPattern != patternTokens) {
+                        errors += "$prefix.patternBottomUp does not match lower/upper trigrams in bottom-up order"
+                    }
+                }
+            }
+
+            val hasSpecial = specialUsage != null
+            when (kingWenNumber) {
+                1 -> if (qianUsage != null && hasSpecial != qianUsage) {
+                    errors += "$prefix.specialUsageText must match specialUsageTexts.qian"
+                }
+                2 -> if (kunUsage != null && hasSpecial != kunUsage) {
+                    errors += "$prefix.specialUsageText must match specialUsageTexts.kun"
+                }
+                else -> if (hasSpecial) {
+                    errors += "$prefix.specialUsageText is only valid for Qian or Kun"
+                }
+            }
+
+            if (
+                errors.none { it.startsWith(prefix) } &&
+                kingWenNumber != null &&
+                name != null &&
+                symbol != null &&
+                judgmentOriginal != null &&
+                judgmentPlain != null &&
+                lineTexts != null &&
+                linePlain != null &&
+                sourceRefs != null
+            ) {
+                hexagrams[kingWenNumber] = HexagramContent(
+                    kingWenNumber = kingWenNumber,
+                    name = name,
+                    symbol = symbol,
+                    judgmentOriginal = judgmentOriginal,
+                    judgmentPlain = judgmentPlain,
+                    lineTextsBottomUp = lineTexts,
+                    linePlainBottomUp = linePlain,
+                    specialUsageText = specialUsage,
+                    sourceRefs = sourceRefs,
+                )
+            }
+        }
+
+        if (hexagrams.size != 64 && errors.none { it.contains("exactly 64") }) {
+            errors += "King Wen numbers 1 through 64 must each occur exactly once"
+        }
+        if (errors.isNotEmpty()) {
+            throw ContentIntegrityException(errors.joinToString(separator = "\n"))
+        }
+
+        return ParsedHexagramContentPackage(
+            manifest = ContentManifest(
+                contentVersion = checkNotNull(contentVersion),
+                digest = jsonDigest(root),
+                sources = sources,
+            ),
+            hexagrams = hexagrams,
+        )
+    }
+
+    private fun hexagramSymbol(kingWenNumber: Int): String =
+        (0x4DC0 + kingWenNumber - 1).toChar().toString()
+
+    private fun expectedBottomUp(lower: String?, upper: String?): List<String>? {
+        val lowerPattern = TRIGRAMS[lower] ?: return null
+        val upperPattern = TRIGRAMS[upper] ?: return null
+        return lowerPattern + upperPattern
+    }
+
+    private fun isHttpUrl(value: String): Boolean =
+        value.startsWith("https://") || value.startsWith("http://")
+
+    private fun JsonValue.Obj.int(key: String, errors: MutableList<String>, prefix: String = ""): Int? {
+        val path = fieldPath(prefix, key)
+        return when (val value = fields[key]) {
+            is JsonValue.Num -> value.value
+            null -> {
+                errors += "$path is missing"
+                null
+            }
+            else -> {
+                errors += "$path must be an integer"
+                null
+            }
+        }
+    }
+
+    private fun JsonValue.Obj.bool(key: String, errors: MutableList<String>, prefix: String = ""): Boolean? {
+        val path = fieldPath(prefix, key)
+        return when (val value = fields[key]) {
+            is JsonValue.Bool -> value.value
+            null -> {
+                errors += "$path is missing"
+                null
+            }
+            else -> {
+                errors += "$path must be a boolean"
+                null
+            }
+        }
+    }
+
+    private fun JsonValue.Obj.text(key: String, errors: MutableList<String>, prefix: String = ""): String? {
+        val path = fieldPath(prefix, key)
+        val value = optionalText(key, errors, prefix)
+        if (value == null && fields[key] !is JsonValue.Null) {
+            if (!fields.containsKey(key)) errors += "$path must be non-blank text"
+        } else if (value == null) {
+            errors += "$path must be non-blank text"
+        }
+        return value
+    }
+
+    private fun JsonValue.Obj.optionalText(
+        key: String,
+        errors: MutableList<String>,
+        prefix: String,
+    ): String? {
+        val path = fieldPath(prefix, key)
+        return when (val value = fields[key]) {
+            JsonValue.Null, null -> null
+            is JsonValue.Str -> {
+                when {
+                    value.value.isBlank() -> {
+                        errors += "$path must be non-blank text or null"
+                        null
+                    }
+                    unsafeText.containsMatchIn(value.value) -> {
+                        errors += "$path contains script-like markup or an invisible control character"
+                        null
+                    }
+                    else -> value.value
+                }
+            }
+            else -> {
+                errors += "$path must be non-blank text or null"
+                null
+            }
+        }
+    }
+
+    private fun JsonValue.Obj.obj(key: String, errors: MutableList<String>): JsonValue.Obj? {
+        return when (val value = fields[key]) {
+            is JsonValue.Obj -> value
+            else -> {
+                errors += "$key must be an object"
+                null
+            }
+        }
+    }
+
+    private fun JsonValue.Obj.arr(key: String, errors: MutableList<String>): List<JsonValue>? {
+        return when (val value = fields[key]) {
+            is JsonValue.Arr -> value.items
+            else -> {
+                errors += "$key must be an array"
+                null
+            }
+        }
+    }
+
+    private fun JsonValue.Obj.sixTexts(
+        key: String,
+        errors: MutableList<String>,
+        prefix: String,
+    ): List<String>? {
+        val values = stringList(key, errors, prefix) ?: return null
+        if (values.size != 6) {
+            errors += "${fieldPath(prefix, key)} must contain exactly six bottom-up entries"
+            return null
+        }
+        return values
+    }
+
+    private fun JsonValue.Obj.stringList(
+        key: String,
+        errors: MutableList<String>,
+        prefix: String,
+    ): List<String>? {
+        val path = fieldPath(prefix, key)
+        val array = fields[key] as? JsonValue.Arr
+        if (array == null) {
+            errors += "$path must be an array"
+            return null
+        }
+        val values = mutableListOf<String>()
+        array.items.forEachIndexed { index, item ->
+            val itemPath = "$path[$index]"
+            val text = (item as? JsonValue.Str)?.value
+            when {
+                text == null || text.isBlank() -> errors += "$itemPath must be non-blank text"
+                unsafeText.containsMatchIn(text) ->
+                    errors += "$itemPath contains script-like markup or an invisible control character"
+                else -> values += text
+            }
+        }
+        return values.takeIf { it.size == array.items.size }
+    }
+
+    private fun fieldPath(prefix: String, key: String): String =
+        if (prefix.isEmpty()) key else "$prefix.$key"
+
+    private val TRIGRAMS = mapOf(
+        "QIAN" to listOf("YANG", "YANG", "YANG"),
+        "DUI" to listOf("YANG", "YANG", "YIN"),
+        "LI" to listOf("YANG", "YIN", "YANG"),
+        "ZHEN" to listOf("YANG", "YIN", "YIN"),
+        "XUN" to listOf("YIN", "YANG", "YANG"),
+        "KAN" to listOf("YIN", "YANG", "YIN"),
+        "GEN" to listOf("YIN", "YIN", "YANG"),
+        "KUN" to listOf("YIN", "YIN", "YIN"),
+    )
+}

app/src/main/java/net/opcapp/flash/data/content/HexagramContentRepository.kt

@@ -1,9 +1,11 @@
-package brainwave.data.content
+package net.opcapp.flash.data.content
 
-import brainwave.core.model.HexagramContent
+import net.opcapp.flash.core.model.ContentManifest
+import net.opcapp.flash.core.model.HexagramContent
 
 interface HexagramContentRepository {
     val contentVersion: String
+    val manifest: ContentManifest
 
     fun contentFor(
         kingWenNumber: Int,

app/src/main/java/net/opcapp/flash/data/content/JsonSupport.kt

@@ -0,0 +1,202 @@
+package net.opcapp.flash.data.content
+
+import java.security.MessageDigest
+
+internal sealed interface JsonValue {
+    data class Obj(val fields: Map<String, JsonValue>) : JsonValue
+    data class Arr(val items: List<JsonValue>) : JsonValue
+    data class Str(val value: String) : JsonValue
+    data class Num(val value: Int) : JsonValue
+    data class Bool(val value: Boolean) : JsonValue
+    data object Null : JsonValue
+}
+
+internal class JsonReader(private val text: String) {
+    private var index = 0
+
+    fun readValue(): JsonValue {
+        skipWhitespace()
+        val value = parseValue()
+        skipWhitespace()
+        if (index != text.length) {
+            error("Unexpected trailing content at index $index")
+        }
+        return value
+    }
+
+    private fun parseValue(): JsonValue {
+        skipWhitespace()
+        return when (val char = peek()) {
+            '{' -> parseObject()
+            '[' -> parseArray()
+            '"' -> JsonValue.Str(parseString())
+            't' -> parseLiteral("true", JsonValue.Bool(true))
+            'f' -> parseLiteral("false", JsonValue.Bool(false))
+            'n' -> parseLiteral("null", JsonValue.Null)
+            '-', in '0'..'9' -> parseNumber()
+            else -> error("Unexpected character '$char' at index $index")
+        }
+    }
+
+    private fun parseObject(): JsonValue.Obj {
+        expect('{')
+        skipWhitespace()
+        val fields = linkedMapOf<String, JsonValue>()
+        if (peek() == '}') {
+            index += 1
+            return JsonValue.Obj(fields)
+        }
+        while (true) {
+            skipWhitespace()
+            val key = parseString()
+            skipWhitespace()
+            expect(':')
+            skipWhitespace()
+            if (fields.containsKey(key)) error("Duplicate JSON key '$key'")
+            fields[key] = parseValue()
+            skipWhitespace()
+            when (peek()) {
+                ',' -> index += 1
+                '}' -> {
+                    index += 1
+                    return JsonValue.Obj(fields)
+                }
+                else -> error("Expected comma or object end at index $index")
+            }
+        }
+    }
+
+    private fun parseArray(): JsonValue.Arr {
+        expect('[')
+        skipWhitespace()
+        val items = mutableListOf<JsonValue>()
+        if (peek() == ']') {
+            index += 1
+            return JsonValue.Arr(items)
+        }
+        while (true) {
+            items += parseValue()
+            skipWhitespace()
+            when (peek()) {
+                ',' -> index += 1
+                ']' -> {
+                    index += 1
+                    return JsonValue.Arr(items)
+                }
+                else -> error("Expected comma or array end at index $index")
+            }
+        }
+    }
+
+    private fun parseString(): String {
+        expect('"')
+        val builder = StringBuilder()
+        while (true) {
+            val char = next()
+            when (char) {
+                '"' -> return builder.toString()
+                '\\' -> builder.append(parseEscape())
+                in '\u0000'..'\u001F' -> error("Unescaped control character in string")
+                else -> builder.append(char)
+            }
+        }
+    }
+
+    private fun parseEscape(): Char {
+        return when (val char = next()) {
+            '"', '\\', '/' -> char
+            'b' -> '\b'
+            'f' -> '\u000C'
+            'n' -> '\n'
+            'r' -> '\r'
+            't' -> '\t'
+            'u' -> {
+                val hex = CharArray(4) { next() }.concatToString()
+                hex.toIntOrNull(16)?.toChar() ?: error("Invalid unicode escape \\u$hex")
+            }
+            else -> error("Invalid string escape \\$char")
+        }
+    }
+
+    private fun parseNumber(): JsonValue.Num {
+        val start = index
+        if (peek() == '-') index += 1
+        if (peek() == '0') {
+            index += 1
+        } else {
+            if (peek() !in '1'..'9') error("Invalid number at index $start")
+            while (peek() in '0'..'9') index += 1
+        }
+        if (peek() == '.' || peek() == 'e' || peek() == 'E') {
+            error("Content JSON numbers must be integers")
+        }
+        return JsonValue.Num(text.substring(start, index).toInt())
+    }
+
+    private fun parseLiteral(literal: String, value: JsonValue): JsonValue {
+        if (!text.startsWith(literal, index)) error("Expected '$literal' at index $index")
+        index += literal.length
+        return value
+    }
+
+    private fun skipWhitespace() {
+        while (index < text.length && text[index] in WHITESPACE) index += 1
+    }
+
+    private fun peek(): Char {
+        if (index >= text.length) error("Unexpected end of JSON")
+        return text[index]
+    }
+
+    private fun next(): Char {
+        val char = peek()
+        index += 1
+        return char
+    }
+
+    private fun expect(char: Char) {
+        if (next() != char) error("Expected '$char' at index ${index - 1}")
+    }
+
+    companion object {
+        private val WHITESPACE = charArrayOf(' ', '\n', '\r', '\t')
+    }
+}
+
+internal fun jsonCanonicalize(value: JsonValue): String = when (value) {
+    JsonValue.Null -> "null"
+    is JsonValue.Bool -> value.value.toString()
+    is JsonValue.Num -> value.value.toString()
+    is JsonValue.Str -> jsonQuote(value.value)
+    is JsonValue.Arr -> value.items.joinToString(",", "[", "]") { jsonCanonicalize(it) }
+    is JsonValue.Obj -> value.fields.keys.sorted().joinToString(",", "{", "}") { key ->
+        "${jsonQuote(key)}:${jsonCanonicalize(value.fields.getValue(key))}"
+    }
+}
+
+internal fun jsonDigest(value: JsonValue): String {
+    val digest = MessageDigest.getInstance("SHA-256")
+        .digest(jsonCanonicalize(value).toByteArray(Charsets.UTF_8))
+    return digest.joinToString("") { byte -> "%02x".format(byte.toInt() and 0xFF) }
+}
+
+private fun jsonQuote(value: String): String {
+    val builder = StringBuilder("\"")
+    for (char in value) {
+        when (char) {
+            '"' -> builder.append("\\\"")
+            '\\' -> builder.append("\\\\")
+            '\b' -> builder.append("\\b")
+            '\u000C' -> builder.append("\\f")
+            '\n' -> builder.append("\\n")
+            '\r' -> builder.append("\\r")
+            '\t' -> builder.append("\\t")
+            else -> if (char.code < 0x20) {
+                builder.append("\\u%04x".format(char.code))
+            } else {
+                builder.append(char)
+            }
+        }
+    }
+    return builder.append('"').toString()
+}

app/src/main/java/net/opcapp/flash/data/di/ContentModule.kt

@@ -0,0 +1,19 @@
+package net.opcapp.flash.data.di
+
+import dagger.Binds
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import javax.inject.Singleton
+import net.opcapp.flash.data.content.AssetsHexagramContentRepository
+import net.opcapp.flash.data.content.HexagramContentRepository
+
+@Module
+@InstallIn(SingletonComponent::class)
+abstract class ContentBindingsModule {
+    @Binds
+    @Singleton
+    abstract fun bindHexagramContentRepository(
+        implementation: AssetsHexagramContentRepository,
+    ): HexagramContentRepository
+}

app/src/main/java/net/opcapp/flash/data/di/PersistenceModule.kt

@@ -0,0 +1,40 @@
+package net.opcapp.flash.data.di
+
+import android.content.Context
+import androidx.room.Room
+import dagger.Binds
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.components.SingletonComponent
+import javax.inject.Singleton
+import net.opcapp.flash.data.history.CastingSessionDao
+import net.opcapp.flash.data.history.HistoryRepository
+import net.opcapp.flash.data.history.LingjiDatabase
+import net.opcapp.flash.data.history.RoomHistoryRepository
+
+@Module
+@InstallIn(SingletonComponent::class)
+abstract class PersistenceBindingsModule {
+    @Binds
+    @Singleton
+    abstract fun bindHistoryRepository(implementation: RoomHistoryRepository): HistoryRepository
+}
+
+@Module
+@InstallIn(SingletonComponent::class)
+object PersistenceModule {
+    @Provides
+    @Singleton
+    fun provideDatabase(@ApplicationContext context: Context): LingjiDatabase =
+        Room.databaseBuilder(
+            context,
+            LingjiDatabase::class.java,
+            LingjiDatabase.NAME,
+        ).build()
+
+    @Provides
+    fun provideCastingSessionDao(database: LingjiDatabase): CastingSessionDao =
+        database.castingSessionDao()
+}

app/src/main/java/net/opcapp/flash/data/history/CastingSessionDao.kt

@@ -0,0 +1,28 @@
+package net.opcapp.flash.data.history
+
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.OnConflictStrategy
+import androidx.room.Query
+import kotlinx.coroutines.flow.Flow
+
+@Dao
+interface CastingSessionDao {
+    @Insert(onConflict = OnConflictStrategy.IGNORE)
+    suspend fun insert(session: CastingSessionEntity): Long
+
+    @Query("SELECT * FROM casting_sessions WHERE id = :id LIMIT 1")
+    suspend fun findById(id: String): CastingSessionEntity?
+
+    @Query("SELECT EXISTS(SELECT 1 FROM casting_sessions WHERE id = :id)")
+    suspend fun exists(id: String): Boolean
+
+    @Query("SELECT COUNT(*) FROM casting_sessions")
+    fun observeCount(): Flow<Int>
+
+    @Query("SELECT * FROM casting_sessions ORDER BY created_at_epoch_millis DESC LIMIT 1")
+    fun observeLatest(): Flow<CastingSessionEntity?>
+
+    @Query("DELETE FROM casting_sessions WHERE id = :id")
+    suspend fun deleteById(id: String): Int
+}

app/src/main/java/net/opcapp/flash/data/history/CastingSessionEntity.kt

@@ -0,0 +1,28 @@
+package net.opcapp.flash.data.history
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.Index
+import androidx.room.PrimaryKey
+
+@Entity(
+    tableName = "casting_sessions",
+    indices = [Index(value = ["created_at_epoch_millis"])],
+)
+data class CastingSessionEntity(
+    @PrimaryKey val id: String,
+    @ColumnInfo(name = "created_at_epoch_millis") val createdAtEpochMillis: Long,
+    @ColumnInfo(name = "created_at_text") val createdAtText: String,
+    @ColumnInfo(name = "method_version") val methodVersion: String,
+    @ColumnInfo(name = "content_version") val contentVersion: String,
+    @ColumnInfo(name = "coin_convention") val coinConvention: String,
+    @ColumnInfo(name = "rounds_json") val roundsJson: String,
+    @ColumnInfo(name = "line_values") val lineValues: String,
+    @ColumnInfo(name = "primary_pattern") val primaryPattern: String,
+    @ColumnInfo(name = "moving_positions") val movingPositions: String,
+    @ColumnInfo(name = "transformed_pattern") val transformedPattern: String,
+    @ColumnInfo(name = "primary_hexagram_id") val primaryHexagramId: Int,
+    @ColumnInfo(name = "transformed_hexagram_id") val transformedHexagramId: Int,
+    @ColumnInfo(name = "question_text") val questionText: String?,
+    @ColumnInfo(name = "question_saved") val questionSaved: Boolean,
+)

app/src/main/java/net/opcapp/flash/data/history/HistoryRecordCodec.kt

@@ -0,0 +1,72 @@
+package net.opcapp.flash.data.history
+
+import java.time.Instant
+import net.opcapp.flash.domain.casting.CastRecordDto
+import net.opcapp.flash.domain.casting.CastResult
+
+internal object HistoryRecordCodec {
+    fun toEntity(
+        id: String,
+        result: CastResult,
+        questionText: String?,
+        saveQuestionText: Boolean,
+    ): CastingSessionEntity {
+        val dto = CastRecordDto.fromDomain(result)
+        return CastingSessionEntity(
+            id = id,
+            createdAtEpochMillis = Instant.parse(dto.createdAt).toEpochMilli(),
+            createdAtText = dto.createdAt,
+            methodVersion = dto.methodVersion,
+            contentVersion = dto.contentVersion,
+            coinConvention = dto.coinConvention,
+            roundsJson = encodeRounds(dto.roundsBottomUp),
+            lineValues = dto.lineValuesBottomUp.joinToString(","),
+            primaryPattern = dto.primaryPatternBottomUp,
+            movingPositions = dto.movingLinePositions.joinToString(","),
+            transformedPattern = dto.transformedPatternBottomUp,
+            primaryHexagramId = dto.primaryHexagramId,
+            transformedHexagramId = dto.transformedHexagramId,
+            questionText = questionText?.takeIf { saveQuestionText },
+            questionSaved = saveQuestionText && questionText != null,
+        )
+    }
+
+    fun toDomain(entity: CastingSessionEntity): CastResult =
+        CastRecordDto(
+            schemaVersion = CastRecordDto.CURRENT_SCHEMA_VERSION,
+            methodVersion = entity.methodVersion,
+            coinConvention = entity.coinConvention,
+            roundsBottomUp = decodeRounds(entity.roundsJson),
+            lineValuesBottomUp = decodeIntegers(entity.lineValues),
+            primaryPatternBottomUp = entity.primaryPattern,
+            movingLinePositions = decodeIntegers(entity.movingPositions),
+            transformedPatternBottomUp = entity.transformedPattern,
+            primaryHexagramId = entity.primaryHexagramId,
+            transformedHexagramId = entity.transformedHexagramId,
+            contentVersion = entity.contentVersion,
+            createdAt = entity.createdAtText,
+        ).toDomain()
+
+    private fun encodeRounds(rounds: List<List<Int>>): String =
+        rounds.joinToString(separator = ",", prefix = "[", postfix = "]") { round ->
+            round.joinToString(separator = ",", prefix = "[", postfix = "]")
+        }
+
+    private fun decodeRounds(value: String): List<List<Int>> {
+        require(value.startsWith("[[") && value.endsWith("]]")) {
+            "Stored rounds must be a JSON array"
+        }
+        val rounds = value.removePrefix("[").removeSuffix("]")
+            .split("],[")
+            .map { encodedRound ->
+                encodedRound.removePrefix("[").removeSuffix("]")
+                    .split(",")
+                    .map(String::toInt)
+            }
+        require(encodeRounds(rounds) == value) { "Stored rounds are not canonical" }
+        return rounds
+    }
+
+    private fun decodeIntegers(value: String): List<Int> =
+        if (value.isEmpty()) emptyList() else value.split(",").map(String::toInt)
+}

app/src/main/java/net/opcapp/flash/data/history/HistoryRepository.kt

@@ -0,0 +1,39 @@
+package net.opcapp.flash.data.history
+
+import kotlinx.coroutines.flow.Flow
+import net.opcapp.flash.data.settings.HistorySavePolicy
+import net.opcapp.flash.domain.casting.CastResult
+
+data class SavedSessionSummary(
+    val id: String,
+    val createdAtEpochMillis: Long,
+    val primaryHexagramId: Int,
+    val transformedHexagramId: Int,
+    val movingLineCount: Int,
+)
+
+data class SavedCastingSession(
+    val id: String,
+    val questionText: String?,
+    val questionSaved: Boolean,
+    val result: CastResult,
+)
+
+interface HistoryRepository {
+    fun observeCount(): Flow<Int>
+
+    fun observeLatest(): Flow<SavedSessionSummary?>
+
+    suspend fun saveSession(
+        id: String,
+        result: CastResult,
+        questionText: String,
+        policy: HistorySavePolicy,
+    ): SavedCastingSession
+
+    suspend fun findById(id: String): SavedCastingSession?
+
+    suspend fun exists(id: String): Boolean
+
+    suspend fun deleteById(id: String): Boolean
+}

app/src/main/java/net/opcapp/flash/data/history/LingjiDatabase.kt

@@ -0,0 +1,17 @@
+package net.opcapp.flash.data.history
+
+import androidx.room.Database
+import androidx.room.RoomDatabase
+
+@Database(
+    entities = [CastingSessionEntity::class],
+    version = 1,
+    exportSchema = true,
+)
+abstract class LingjiDatabase : RoomDatabase() {
+    abstract fun castingSessionDao(): CastingSessionDao
+
+    companion object {
+        const val NAME = "lingji-history.db"
+    }
+}

app/src/main/java/net/opcapp/flash/data/history/RoomHistoryRepository.kt

@@ -0,0 +1,65 @@
+package net.opcapp.flash.data.history
+
+import androidx.room.withTransaction
+import javax.inject.Inject
+import javax.inject.Singleton
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
+import net.opcapp.flash.data.settings.HistorySavePolicy
+import net.opcapp.flash.domain.casting.CastResult
+
+@Singleton
+class RoomHistoryRepository @Inject constructor(
+    private val database: LingjiDatabase,
+    private val dao: CastingSessionDao,
+) : HistoryRepository {
+    override fun observeCount(): Flow<Int> = dao.observeCount()
+
+    override fun observeLatest(): Flow<SavedSessionSummary?> = dao.observeLatest().map { entity ->
+        entity?.toSummary()
+    }
+
+    override suspend fun saveSession(
+        id: String,
+        result: CastResult,
+        questionText: String,
+        policy: HistorySavePolicy,
+    ): SavedCastingSession = database.withTransaction {
+        dao.insert(
+            HistoryRecordCodec.toEntity(
+                id = id,
+                result = result,
+                questionText = questionText,
+                saveQuestionText = policy.saveQuestionText,
+            ),
+        )
+        checkNotNull(dao.findById(id)).toSavedSession()
+    }
+
+    override suspend fun findById(id: String): SavedCastingSession? =
+        dao.findById(id)?.toSavedSession()
+
+    override suspend fun exists(id: String): Boolean = dao.exists(id)
+
+    override suspend fun deleteById(id: String): Boolean = database.withTransaction {
+        dao.deleteById(id) > 0
+    }
+
+    private fun CastingSessionEntity.toSummary() = SavedSessionSummary(
+        id = id,
+        createdAtEpochMillis = createdAtEpochMillis,
+        primaryHexagramId = primaryHexagramId,
+        transformedHexagramId = transformedHexagramId,
+        movingLineCount = decodeMovingLineCount(movingPositions),
+    )
+
+    private fun CastingSessionEntity.toSavedSession() = SavedCastingSession(
+        id = id,
+        questionText = questionText,
+        questionSaved = questionSaved,
+        result = HistoryRecordCodec.toDomain(this),
+    )
+
+    private fun decodeMovingLineCount(value: String): Int =
+        if (value.isEmpty()) 0 else value.split(",").size
+}

app/src/main/java/net/opcapp/flash/data/settings/HistorySavePolicy.kt

@@ -0,0 +1,8 @@
+package net.opcapp.flash.data.settings
+
+data class HistorySavePolicy(
+    val autoSaveHistory: Boolean = true,
+    val saveQuestionText: Boolean = true,
+    val saveExplanationContent: Boolean = true,
+    val saveActionNote: Boolean = true,
+)

app/src/main/java/net/opcapp/flash/data/settings/HistorySettingsRepository.kt

@@ -0,0 +1,73 @@
+package net.opcapp.flash.data.settings
+
+import android.content.Context
+import androidx.datastore.core.DataStore
+import androidx.datastore.preferences.core.Preferences
+import androidx.datastore.preferences.core.booleanPreferencesKey
+import androidx.datastore.preferences.core.emptyPreferences
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.preferencesDataStore
+import dagger.hilt.android.qualifiers.ApplicationContext
+import java.io.IOException
+import javax.inject.Inject
+import javax.inject.Singleton
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.catch
+import kotlinx.coroutines.flow.map
+
+private const val DATASTORE_NAME = "history-save-settings"
+private val Context.historySettingsDataStore: DataStore<Preferences> by preferencesDataStore(
+    name = DATASTORE_NAME,
+)
+
+@Singleton
+class HistorySettingsRepository @Inject constructor(
+    @ApplicationContext private val context: Context,
+) {
+    private val preferencesData: Flow<Preferences> = context.historySettingsDataStore.data
+        .catch { exception ->
+            if (exception is IOException) {
+                emit(emptyPreferences())
+            } else {
+                throw exception
+            }
+        }
+
+    val policy: Flow<HistorySavePolicy> = preferencesData.map { preferences ->
+        HistorySavePolicy(
+            autoSaveHistory = preferences[Keys.AutoSaveHistory] ?: true,
+            saveQuestionText = preferences[Keys.SaveQuestionText] ?: true,
+            saveExplanationContent = preferences[Keys.SaveExplanationContent] ?: true,
+            saveActionNote = preferences[Keys.SaveActionNote] ?: true,
+        )
+    }
+
+    val hasSeenMethodIntro: Flow<Boolean> = preferencesData.map { preferences ->
+        preferences[Keys.HasSeenMethodIntro] ?: false
+    }
+
+    suspend fun setHasSeenMethodIntro(seen: Boolean) = set(Keys.HasSeenMethodIntro, seen)
+
+    suspend fun setAutoSaveHistory(enabled: Boolean) = set(Keys.AutoSaveHistory, enabled)
+
+    suspend fun setSaveQuestionText(enabled: Boolean) = set(Keys.SaveQuestionText, enabled)
+
+    suspend fun setSaveExplanationContent(enabled: Boolean) =
+        set(Keys.SaveExplanationContent, enabled)
+
+    suspend fun setSaveActionNote(enabled: Boolean) = set(Keys.SaveActionNote, enabled)
+
+    private suspend fun set(key: Preferences.Key<Boolean>, enabled: Boolean) {
+        context.historySettingsDataStore.edit { preferences ->
+            preferences[key] = enabled
+        }
+    }
+
+    private object Keys {
+        val HasSeenMethodIntro = booleanPreferencesKey("has_seen_method_intro")
+        val AutoSaveHistory = booleanPreferencesKey("auto_save_history")
+        val SaveQuestionText = booleanPreferencesKey("save_question_text")
+        val SaveExplanationContent = booleanPreferencesKey("save_explanation_content")
+        val SaveActionNote = booleanPreferencesKey("save_action_note")
+    }
+}

app/src/main/java/net/opcapp/flash/domain/casting/CastEngine.kt

@@ -1,4 +1,4 @@
-package brainwave.domain.casting
+package net.opcapp.flash.domain.casting
 
 data class CastComputation internal constructor(
     val roundsBottomUp: List<CastRound>,

app/src/main/java/net/opcapp/flash/domain/casting/CastRecordDto.kt

@@ -1,4 +1,4 @@
-package brainwave.domain.casting
+package net.opcapp.flash.domain.casting
 
 data class CastRecordDto(
     val schemaVersion: Int,

app/src/main/java/net/opcapp/flash/domain/casting/CastingModels.kt

@@ -1,4 +1,4 @@
-package brainwave.domain.casting
+package net.opcapp.flash.domain.casting
 
 enum class CoinSide(val score: Int) {
     CHARACTER(2),

app/src/main/java/net/opcapp/flash/domain/casting/HexagramCatalog.kt

@@ -1,4 +1,4 @@
-package brainwave.domain.casting
+package net.opcapp.flash.domain.casting
 
 object HexagramCatalog {
     private enum class Trigram(val patternBottomUp: String) {

app/src/main/java/net/opcapp/flash/feature/casting/CastingScreen.kt

@@ -0,0 +1,325 @@
+package net.opcapp.flash.feature.casting
+
+import androidx.activity.compose.BackHandler
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.safeDrawing
+import androidx.compose.foundation.layout.widthIn
+import androidx.compose.foundation.layout.windowInsetsPadding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Button
+import androidx.compose.material3.ButtonDefaults
+import androidx.compose.material3.Card
+import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.LinearProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.semantics.selected
+import androidx.compose.ui.semantics.semantics
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.platform.testTag
+import net.opcapp.flash.R
+import net.opcapp.flash.domain.casting.CastRound
+import net.opcapp.flash.domain.casting.CoinSide
+import net.opcapp.flash.domain.casting.LineValue
+
+@Composable
+fun CastingScreen(
+    uiState: CastingUiState,
+    onSelectCoin: (Int, CoinSide) -> Unit,
+    onConfirmRound: () -> Unit,
+    onEditRound: (Int) -> Unit,
+    onBack: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    BackHandler(onBack = onBack)
+    Surface(
+        modifier = modifier.fillMaxSize(),
+        color = MaterialTheme.colorScheme.background,
+    ) {
+        Box(contentAlignment = Alignment.TopCenter) {
+            Column(
+                modifier = Modifier
+                    .widthIn(max = 600.dp)
+                    .fillMaxWidth()
+                    .windowInsetsPadding(WindowInsets.safeDrawing)
+                    .verticalScroll(rememberScrollState())
+                    .padding(horizontal = 24.dp, vertical = 12.dp),
+                verticalArrangement = Arrangement.spacedBy(16.dp),
+            ) {
+                TextButton(
+                    onClick = onBack,
+                    modifier = Modifier.height(48.dp),
+                ) {
+                    Text(stringResource(R.string.back_to_question))
+                }
+                Text(
+                    text = stringResource(R.string.casting_step, uiState.currentRoundNumber),
+                    style = MaterialTheme.typography.labelLarge,
+                    color = MaterialTheme.colorScheme.primary,
+                )
+                Text(
+                    text = stringResource(R.string.casting_title),
+                    style = MaterialTheme.typography.headlineMedium,
+                )
+                Text(
+                    text = stringResource(R.string.coin_convention_visible),
+                    style = MaterialTheme.typography.bodyLarge,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                LinearProgressIndicator(
+                    progress = uiState.confirmedRounds.size / 6f,
+                    modifier = Modifier.fillMaxWidth(),
+                )
+                Text(
+                    text = stringResource(
+                        R.string.round_progress,
+                        uiState.confirmedRounds.size,
+                        6,
+                    ),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                CoinEntryCard(
+                    currentRoundNumber = uiState.currentRoundNumber,
+                    selections = uiState.currentCoins,
+                    preview = uiState.currentRound,
+                    onSelectCoin = onSelectCoin,
+                    onConfirmRound = onConfirmRound,
+                )
+                if (uiState.confirmedRounds.isNotEmpty()) {
+                    ConfirmedRoundsCard(
+                        rounds = uiState.confirmedRounds,
+                        onEditRound = onEditRound,
+                    )
+                }
+                Spacer(Modifier.height(16.dp))
+            }
+        }
+    }
+}
+
+@Composable
+private fun CoinEntryCard(
+    currentRoundNumber: Int,
+    selections: List<CoinSide?>,
+    preview: CastRound?,
+    onSelectCoin: (Int, CoinSide) -> Unit,
+    onConfirmRound: () -> Unit,
+) {
+    Card(
+        modifier = Modifier.fillMaxWidth(),
+        colors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surface),
+        shape = RoundedCornerShape(20.dp),
+    ) {
+        Column(
+            modifier = Modifier.padding(20.dp),
+            verticalArrangement = Arrangement.spacedBy(16.dp),
+        ) {
+            Text(
+                text = stringResource(R.string.current_line_title, linePositionName(currentRoundNumber)),
+                style = MaterialTheme.typography.titleLarge,
+            )
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                repeat(CastRound.COINS_PER_ROUND) { index ->
+                    CoinSelector(
+                        index = index,
+                        selected = selections[index],
+                        onSelected = { side -> onSelectCoin(index, side) },
+                        modifier = Modifier.weight(1f),
+                    )
+                }
+            }
+            if (preview != null) {
+                val lineValue = preview.lineValue
+                Text(
+                    text = stringResource(
+                        R.string.current_line_preview,
+                        lineValue.score,
+                        lineValue.displayName(),
+                        if (lineValue.isMoving) {
+                            stringResource(R.string.moving_line)
+                        } else {
+                            stringResource(R.string.static_line)
+                        },
+                    ),
+                    style = MaterialTheme.typography.bodyLarge,
+                    color = if (lineValue.isMoving) {
+                        MaterialTheme.colorScheme.primary
+                    } else {
+                        MaterialTheme.colorScheme.onSurfaceVariant
+                    },
+                )
+            } else {
+                Text(
+                    text = stringResource(R.string.select_all_three_coins),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+            Button(
+                onClick = onConfirmRound,
+                enabled = preview != null,
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .height(56.dp)
+                    .testTag("confirm_round"),
+                shape = RoundedCornerShape(16.dp),
+            ) {
+                Text(
+                    if (currentRoundNumber == 6) {
+                        stringResource(R.string.confirm_and_finish)
+                    } else {
+                        stringResource(R.string.confirm_this_line)
+                    },
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun CoinSelector(
+    index: Int,
+    selected: CoinSide?,
+    onSelected: (CoinSide) -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    Column(
+        modifier = modifier,
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.spacedBy(8.dp),
+    ) {
+        Text(
+            text = stringResource(R.string.coin_index, index + 1),
+            style = MaterialTheme.typography.labelLarge,
+        )
+        CoinChoice(
+            text = stringResource(R.string.coin_character),
+            isSelected = selected == CoinSide.CHARACTER,
+            onClick = { onSelected(CoinSide.CHARACTER) },
+            testTag = "coin_${index}_character",
+        )
+        CoinChoice(
+            text = stringResource(R.string.coin_reverse),
+            isSelected = selected == CoinSide.REVERSE,
+            onClick = { onSelected(CoinSide.REVERSE) },
+            testTag = "coin_${index}_reverse",
+        )
+    }
+}
+
+@Composable
+private fun CoinChoice(
+    text: String,
+    isSelected: Boolean,
+    onClick: () -> Unit,
+    testTag: String,
+) {
+    OutlinedButton(
+        onClick = onClick,
+        modifier = Modifier
+            .fillMaxWidth()
+            .height(48.dp)
+            .semantics { selected = isSelected }
+            .testTag(testTag),
+        colors = ButtonDefaults.outlinedButtonColors(
+            containerColor = if (isSelected) {
+                MaterialTheme.colorScheme.primaryContainer
+            } else {
+                MaterialTheme.colorScheme.surface
+            },
+            contentColor = if (isSelected) {
+                MaterialTheme.colorScheme.onPrimaryContainer
+            } else {
+                MaterialTheme.colorScheme.onSurface
+            },
+        ),
+        contentPadding = ButtonDefaults.TextButtonContentPadding,
+    ) {
+        Text(text)
+    }
+}
+
+@Composable
+private fun ConfirmedRoundsCard(
+    rounds: List<CastRound>,
+    onEditRound: (Int) -> Unit,
+) {
+    Card(
+        modifier = Modifier.fillMaxWidth(),
+        colors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surfaceVariant),
+        shape = RoundedCornerShape(20.dp),
+    ) {
+        Column(modifier = Modifier.padding(20.dp)) {
+            Text(
+                text = stringResource(R.string.confirmed_lines_title),
+                style = MaterialTheme.typography.titleLarge,
+            )
+            rounds.forEachIndexed { index, round ->
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(top = 8.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                ) {
+                    Text(
+                        text = stringResource(
+                            R.string.confirmed_line_summary,
+                            linePositionName(index + 1),
+                            round.lineValue.score,
+                            round.lineValue.displayName(),
+                        ),
+                        style = MaterialTheme.typography.bodyLarge,
+                        modifier = Modifier.weight(1f),
+                    )
+                    TextButton(
+                        onClick = { onEditRound(index) },
+                        modifier = Modifier.height(48.dp),
+                    ) {
+                        Text(stringResource(R.string.rerecord_from_line))
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun linePositionName(position: Int): String = when (position) {
+    1 -> stringResource(R.string.line_first)
+    2 -> stringResource(R.string.line_second)
+    3 -> stringResource(R.string.line_third)
+    4 -> stringResource(R.string.line_fourth)
+    5 -> stringResource(R.string.line_fifth)
+    6 -> stringResource(R.string.line_top)
+    else -> error("Line position must be 1..6")
+}
+
+@Composable
+private fun LineValue.displayName(): String = when (this) {
+    LineValue.OLD_YIN -> stringResource(R.string.old_yin)
+    LineValue.YOUNG_YANG -> stringResource(R.string.young_yang)
+    LineValue.YOUNG_YIN -> stringResource(R.string.young_yin)
+    LineValue.OLD_YANG -> stringResource(R.string.old_yang)
+}

app/src/main/java/net/opcapp/flash/feature/casting/CastingViewModel.kt

@@ -0,0 +1,373 @@
+package net.opcapp.flash.feature.casting
+
+import androidx.lifecycle.SavedStateHandle
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import dagger.hilt.android.lifecycle.HiltViewModel
+import java.time.Instant
+import java.util.UUID
+import javax.inject.Inject
+import kotlinx.coroutines.CancellationException
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.launch
+import net.opcapp.flash.core.model.HexagramContent
+import net.opcapp.flash.data.content.ContentIntegrityException
+import net.opcapp.flash.data.content.HexagramContentRepository
+import net.opcapp.flash.data.history.HistoryRepository
+import net.opcapp.flash.data.history.SavedCastingSession
+import net.opcapp.flash.data.settings.HistorySettingsRepository
+import net.opcapp.flash.domain.casting.CastEngine
+import net.opcapp.flash.domain.casting.CastMetadata
+import net.opcapp.flash.domain.casting.CastResult
+import net.opcapp.flash.domain.casting.CastRound
+import net.opcapp.flash.domain.casting.CoinSide
+import net.opcapp.flash.domain.casting.LineValue
+
+sealed interface HistorySaveStatus {
+    data object Draft : HistorySaveStatus
+
+    data object Saving : HistorySaveStatus
+
+    data class Saved(
+        val sessionId: String,
+        val questionSaved: Boolean,
+    ) : HistorySaveStatus
+
+    data object NotSaved : HistorySaveStatus
+
+    data object Deleting : HistorySaveStatus
+
+    data class Failed(val operation: Operation) : HistorySaveStatus {
+        enum class Operation {
+            SAVE,
+            DELETE,
+        }
+    }
+}
+
+data class CastingUiState(
+    val question: String = "",
+    val confirmedRounds: List<CastRound> = emptyList(),
+    val currentCoins: List<CoinSide?> = List(CastRound.COINS_PER_ROUND) { null },
+    val result: CastResult? = null,
+    val sessionId: String? = null,
+    val saveStatus: HistorySaveStatus = HistorySaveStatus.Draft,
+    val primaryContent: HexagramContent? = null,
+    val transformedContent: HexagramContent? = null,
+    val contentError: String? = null,
+    val showSpecialUsage: Boolean = false,
+) {
+    val currentRoundNumber: Int
+        get() = (confirmedRounds.size + 1).coerceAtMost(6)
+
+    val currentRound: CastRound?
+        get() = currentCoins.filterNotNull()
+            .takeIf { it.size == CastRound.COINS_PER_ROUND }
+            ?.let(CastRound::of)
+}
+
+@HiltViewModel
+class CastingViewModel @Inject constructor(
+    private val savedStateHandle: SavedStateHandle,
+    private val historyRepository: HistoryRepository,
+    private val settingsRepository: HistorySettingsRepository,
+    private val contentRepository: HexagramContentRepository,
+) : ViewModel() {
+    private val restoredRounds = decodeRounds(savedStateHandle[Keys.Rounds])
+    private val restoredCreatedAt = savedStateHandle.get<String>(Keys.CreatedAt)
+    private val restoredResult = restoredCreatedAt
+        ?.takeIf { restoredRounds.size == 6 }
+        ?.let { createdAt -> createResult(restoredRounds, createdAt) }
+    private val restoredContent = resolveContent(restoredResult)
+
+    private val _uiState = MutableStateFlow(
+        CastingUiState(
+            question = savedStateHandle[Keys.Question] ?: "",
+            confirmedRounds = restoredRounds,
+            currentCoins = decodeCurrentCoins(savedStateHandle[Keys.CurrentCoins]),
+            result = restoredResult,
+            sessionId = savedStateHandle[Keys.SessionId],
+            saveStatus = if (restoredResult == null) {
+                HistorySaveStatus.Draft
+            } else {
+                HistorySaveStatus.Saving
+            },
+            primaryContent = restoredContent.primary,
+            transformedContent = restoredContent.transformed,
+            contentError = restoredContent.error,
+            showSpecialUsage = restoredContent.showSpecialUsage,
+        ),
+    )
+    val uiState: StateFlow<CastingUiState> = _uiState.asStateFlow()
+
+    private var persistenceJob: Job? = null
+
+    init {
+        if (restoredResult != null) reconcileRestoredResult()
+    }
+
+    fun startNewSession() {
+        persistenceJob?.cancel()
+        savedStateHandle.remove<String>(Keys.CreatedAt)
+        savedStateHandle.remove<String>(Keys.SessionId)
+        saveQuestion("")
+        saveRounds(emptyList())
+        saveCurrentCoins(List(CastRound.COINS_PER_ROUND) { null })
+        _uiState.value = CastingUiState()
+    }
+
+    fun updateQuestion(question: String) {
+        saveQuestion(question)
+        _uiState.value = _uiState.value.copy(question = question)
+    }
+
+    fun selectCoin(index: Int, side: CoinSide) {
+        require(index in 0 until CastRound.COINS_PER_ROUND)
+        check(_uiState.value.result == null) { "A sealed casting session cannot be edited" }
+        val updated = _uiState.value.currentCoins.toMutableList().apply { this[index] = side }
+        saveCurrentCoins(updated)
+        _uiState.value = _uiState.value.copy(currentCoins = updated)
+    }
+
+    fun confirmCurrentRound(): Boolean {
+        val state = _uiState.value
+        check(state.result == null) { "A sealed casting session cannot be confirmed again" }
+        val round = state.currentRound ?: return false
+        val updatedRounds = state.confirmedRounds + round
+        saveRounds(updatedRounds)
+        saveCurrentCoins(List(CastRound.COINS_PER_ROUND) { null })
+
+        if (updatedRounds.size < 6) {
+            _uiState.value = state.copy(
+                confirmedRounds = updatedRounds,
+                currentCoins = List(CastRound.COINS_PER_ROUND) { null },
+            )
+            return false
+        }
+
+        val createdAt = Instant.now().toString()
+        val sessionId = UUID.randomUUID().toString()
+        val result = createResult(updatedRounds, createdAt)
+        val content = resolveContent(result)
+        savedStateHandle[Keys.CreatedAt] = createdAt
+        savedStateHandle[Keys.SessionId] = sessionId
+        _uiState.value = state.copy(
+            confirmedRounds = updatedRounds,
+            currentCoins = List(CastRound.COINS_PER_ROUND) { null },
+            result = result,
+            sessionId = sessionId,
+            saveStatus = HistorySaveStatus.Saving,
+            primaryContent = content.primary,
+            transformedContent = content.transformed,
+            contentError = content.error,
+            showSpecialUsage = content.showSpecialUsage,
+        )
+        persistResult(autoOnly = true)
+        return true
+    }
+
+    fun editFrom(roundIndex: Int) {
+        val state = _uiState.value
+        check(state.result == null) { "A sealed casting session cannot be edited" }
+        require(roundIndex in state.confirmedRounds.indices)
+        val roundToEdit = state.confirmedRounds[roundIndex]
+        val retainedRounds = state.confirmedRounds.take(roundIndex)
+        saveRounds(retainedRounds)
+        saveCurrentCoins(roundToEdit.coins)
+        _uiState.value = state.copy(
+            confirmedRounds = retainedRounds,
+            currentCoins = roundToEdit.coins,
+        )
+    }
+
+    fun saveManually() = persistResult(autoOnly = false)
+
+    fun retryLastPersistenceOperation() {
+        when ((_uiState.value.saveStatus as? HistorySaveStatus.Failed)?.operation) {
+            HistorySaveStatus.Failed.Operation.SAVE -> persistResult(autoOnly = false)
+            HistorySaveStatus.Failed.Operation.DELETE -> deleteSavedSession()
+            null -> Unit
+        }
+    }
+
+    fun deleteSavedSession() {
+        val sessionId = _uiState.value.sessionId
+            ?: (_uiState.value.saveStatus as? HistorySaveStatus.Saved)?.sessionId
+        if (sessionId == null) {
+            persistenceJob?.cancel()
+            _uiState.value = _uiState.value.copy(saveStatus = HistorySaveStatus.NotSaved)
+            return
+        }
+        persistenceJob?.cancel()
+        _uiState.value = _uiState.value.copy(saveStatus = HistorySaveStatus.Deleting)
+        persistenceJob = viewModelScope.launch {
+            try {
+                historyRepository.deleteById(sessionId)
+                _uiState.value = _uiState.value.copy(saveStatus = HistorySaveStatus.NotSaved)
+            } catch (cancelled: CancellationException) {
+                throw cancelled
+            } catch (_: Exception) {
+                _uiState.value = _uiState.value.copy(
+                    saveStatus = HistorySaveStatus.Failed(
+                        HistorySaveStatus.Failed.Operation.DELETE,
+                    ),
+                )
+            }
+        }
+    }
+
+    private fun reconcileRestoredResult() {
+        val state = _uiState.value
+        val sessionId = state.sessionId ?: return
+        persistenceJob = viewModelScope.launch {
+            try {
+                applySaveSuccess(
+                    historyRepository.findById(sessionId) ?: saveState(state, autoOnly = true),
+                )
+            } catch (cancelled: CancellationException) {
+                throw cancelled
+            } catch (_: Exception) {
+                applySaveFailure()
+            }
+        }
+    }
+
+    private fun persistResult(autoOnly: Boolean) {
+        val state = _uiState.value
+        if (state.result == null || state.sessionId == null) return
+        persistenceJob?.cancel()
+        _uiState.value = state.copy(saveStatus = HistorySaveStatus.Saving)
+        persistenceJob = viewModelScope.launch {
+            try {
+                applySaveSuccess(saveState(state, autoOnly))
+            } catch (cancelled: CancellationException) {
+                throw cancelled
+            } catch (_: Exception) {
+                applySaveFailure()
+            }
+        }
+    }
+
+    private suspend fun saveState(
+        state: CastingUiState,
+        autoOnly: Boolean,
+    ): SavedCastingSession? {
+        val result = state.result ?: return null
+        val sessionId = state.sessionId ?: return null
+        val policy = settingsRepository.policy.first()
+        if (autoOnly && !policy.autoSaveHistory) return null
+        return historyRepository.saveSession(
+            id = sessionId,
+            result = result,
+            questionText = state.question.trim(),
+            policy = policy,
+        )
+    }
+
+    private fun applySaveSuccess(savedSession: SavedCastingSession?) {
+        _uiState.value = _uiState.value.copy(
+            saveStatus = if (savedSession == null) {
+                HistorySaveStatus.NotSaved
+            } else {
+                HistorySaveStatus.Saved(
+                    sessionId = savedSession.id,
+                    questionSaved = savedSession.questionSaved,
+                )
+            },
+        )
+    }
+
+    private fun applySaveFailure() {
+        _uiState.value = _uiState.value.copy(
+            saveStatus = HistorySaveStatus.Failed(
+                HistorySaveStatus.Failed.Operation.SAVE,
+            ),
+        )
+    }
+
+    private fun saveQuestion(question: String) {
+        savedStateHandle[Keys.Question] = question
+    }
+
+    private fun saveRounds(rounds: List<CastRound>) {
+        savedStateHandle[Keys.Rounds] = ArrayList(
+            rounds.flatMap { round -> round.coins.map(CoinSide::score) },
+        )
+    }
+
+    private fun saveCurrentCoins(coins: List<CoinSide?>) {
+        savedStateHandle[Keys.CurrentCoins] = ArrayList(coins.map { it?.score ?: 0 })
+    }
+
+    private fun createResult(rounds: List<CastRound>, createdAt: String): CastResult =
+        CastResult.record(
+            computation = CastEngine.cast(rounds),
+            metadata = CastMetadata(
+                contentVersion = contentRepository.contentVersion,
+                createdAt = createdAt,
+            ),
+        )
+
+    private fun resolveContent(result: CastResult?): ResolvedContent {
+        if (result == null) return ResolvedContent()
+        val showSpecialUsage = when (result.primaryHexagramId.value) {
+            1 -> result.lineValuesBottomUp.all { it == LineValue.OLD_YANG }
+            2 -> result.lineValuesBottomUp.all { it == LineValue.OLD_YIN }
+            else -> false
+        }
+        return try {
+            val primary = contentRepository.contentFor(
+                result.primaryHexagramId.value,
+                result.contentVersion,
+            )
+            val transformed = if (result.transformedHexagramId == result.primaryHexagramId) {
+                primary
+            } else {
+                contentRepository.contentFor(
+                    result.transformedHexagramId.value,
+                    result.contentVersion,
+                )
+            }
+            ResolvedContent(
+                primary = primary,
+                transformed = transformed,
+                showSpecialUsage = showSpecialUsage,
+            )
+        } catch (error: ContentIntegrityException) {
+            ResolvedContent(
+                error = error.message,
+                showSpecialUsage = showSpecialUsage,
+            )
+        }
+    }
+
+    private data class ResolvedContent(
+        val primary: HexagramContent? = null,
+        val transformed: HexagramContent? = null,
+        val error: String? = null,
+        val showSpecialUsage: Boolean = false,
+    )
+
+    private fun decodeRounds(scores: ArrayList<Int>?): List<CastRound> =
+        scores.orEmpty().chunked(CastRound.COINS_PER_ROUND).map(CastRound::fromScores)
+
+    private fun decodeCurrentCoins(scores: ArrayList<Int>?): List<CoinSide?> {
+        val restored = scores.orEmpty().take(CastRound.COINS_PER_ROUND).map { score ->
+            if (score == 0) null else CoinSide.fromScore(score)
+        }
+        return restored + List(CastRound.COINS_PER_ROUND - restored.size) { null }
+    }
+
+    private object Keys {
+        const val Question = "casting_question"
+        const val Rounds = "casting_round_scores"
+        const val CurrentCoins = "casting_current_coin_scores"
+        const val CreatedAt = "casting_created_at"
+        const val SessionId = "casting_session_id"
+    }
+
+}

app/src/main/java/net/opcapp/flash/feature/content/ContentSourcesScreen.kt

@@ -0,0 +1,121 @@
+package net.opcapp.flash.feature.content
+
+import androidx.activity.compose.BackHandler
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.safeDrawing
+import androidx.compose.foundation.layout.widthIn
+import androidx.compose.foundation.layout.windowInsetsPadding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Card
+import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import net.opcapp.flash.R
+import net.opcapp.flash.core.model.ContentManifest
+
+@Composable
+fun ContentSourcesScreen(
+    manifest: ContentManifest,
+    onBack: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    BackHandler(onBack = onBack)
+    Surface(
+        modifier = modifier.fillMaxSize(),
+        color = MaterialTheme.colorScheme.background,
+    ) {
+        Box(contentAlignment = Alignment.TopCenter) {
+            Column(
+                modifier = Modifier
+                    .widthIn(max = 600.dp)
+                    .fillMaxWidth()
+                    .windowInsetsPadding(WindowInsets.safeDrawing)
+                    .verticalScroll(rememberScrollState())
+                    .padding(horizontal = 24.dp, vertical = 12.dp),
+                verticalArrangement = Arrangement.spacedBy(16.dp),
+            ) {
+                TextButton(
+                    onClick = onBack,
+                    modifier = Modifier.height(48.dp),
+                ) {
+                    Text(stringResource(R.string.back))
+                }
+                Text(
+                    text = stringResource(R.string.content_sources_title),
+                    style = MaterialTheme.typography.headlineMedium,
+                )
+                Text(
+                    text = stringResource(R.string.content_sources_lede),
+                    style = MaterialTheme.typography.bodyLarge,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                Text(
+                    text = stringResource(R.string.content_version_label, manifest.contentVersion),
+                    style = MaterialTheme.typography.titleLarge,
+                )
+                Text(
+                    text = stringResource(R.string.content_digest_label, manifest.digest),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                if (manifest.loadError != null) {
+                    Text(
+                        text = stringResource(R.string.content_integrity_error),
+                        style = MaterialTheme.typography.bodyLarge,
+                        color = MaterialTheme.colorScheme.error,
+                    )
+                }
+                manifest.sources.forEach { source ->
+                    Card(
+                        modifier = Modifier.fillMaxWidth(),
+                        colors = CardDefaults.cardColors(
+                            containerColor = MaterialTheme.colorScheme.surface,
+                        ),
+                        shape = RoundedCornerShape(20.dp),
+                    ) {
+                        Column(
+                            modifier = Modifier.padding(20.dp),
+                            verticalArrangement = Arrangement.spacedBy(8.dp),
+                        ) {
+                            Text(text = source.title, style = MaterialTheme.typography.titleLarge)
+                            Text(
+                                text = stringResource(R.string.content_source_edition, source.edition),
+                                style = MaterialTheme.typography.bodyMedium,
+                            )
+                            Text(
+                                text = stringResource(R.string.content_source_license, source.license),
+                                style = MaterialTheme.typography.bodyMedium,
+                            )
+                            Text(
+                                text = stringResource(R.string.content_source_url, source.url),
+                                style = MaterialTheme.typography.bodyMedium,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            )
+                        }
+                    }
+                }
+                Text(
+                    text = stringResource(R.string.content_review_pending),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+    }
+}

app/src/main/java/net/opcapp/flash/feature/home/HomeScreen.kt

@@ -0,0 +1,223 @@
+package net.opcapp.flash.feature.home
+
+import android.text.format.DateFormat
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.safeDrawing
+import androidx.compose.foundation.layout.widthIn
+import androidx.compose.foundation.layout.windowInsetsPadding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import java.util.Date
+import net.opcapp.flash.R
+import net.opcapp.flash.core.model.HexagramNames
+
+@Composable
+fun HomeScreen(
+    uiState: HomeUiState,
+    onStartCasting: () -> Unit,
+    onOpenSettings: () -> Unit,
+    onOpenMethodIntro: () -> Unit,
+    onOpenContentSources: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    Surface(
+        modifier = modifier.fillMaxSize(),
+        color = MaterialTheme.colorScheme.background,
+    ) {
+        Box(contentAlignment = Alignment.TopCenter) {
+            Column(
+                modifier = Modifier
+                    .widthIn(max = 600.dp)
+                    .fillMaxWidth()
+                    .windowInsetsPadding(WindowInsets.safeDrawing)
+                    .verticalScroll(rememberScrollState())
+                    .padding(horizontal = 24.dp, vertical = 20.dp),
+                horizontalAlignment = Alignment.CenterHorizontally,
+            ) {
+                Text(
+                    text = stringResource(R.string.home_kicker),
+                    style = MaterialTheme.typography.labelLarge,
+                    color = MaterialTheme.colorScheme.primary,
+                )
+                Spacer(Modifier.height(24.dp))
+                Surface(
+                    color = MaterialTheme.colorScheme.primary,
+                    shape = RoundedCornerShape(18.dp),
+                ) {
+                    Text(
+                        text = stringResource(R.string.seal_character),
+                        style = MaterialTheme.typography.headlineMedium,
+                        color = MaterialTheme.colorScheme.onPrimary,
+                        modifier = Modifier.padding(horizontal = 22.dp, vertical = 16.dp),
+                    )
+                }
+                Spacer(Modifier.height(20.dp))
+                Text(
+                    text = stringResource(R.string.app_name),
+                    style = MaterialTheme.typography.displaySmall,
+                )
+                Text(
+                    text = stringResource(R.string.home_lede),
+                    style = MaterialTheme.typography.bodyLarge,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(top = 8.dp),
+                )
+                Spacer(Modifier.height(32.dp))
+                Button(
+                    onClick = onStartCasting,
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .height(56.dp),
+                    shape = RoundedCornerShape(16.dp),
+                ) {
+                    Text(stringResource(R.string.start_casting))
+                }
+                Spacer(Modifier.height(20.dp))
+                Card(
+                    modifier = Modifier.fillMaxWidth(),
+                    colors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surface),
+                    shape = RoundedCornerShape(20.dp),
+                ) {
+                    Column(
+                        modifier = Modifier.padding(20.dp),
+                        verticalArrangement = Arrangement.spacedBy(8.dp),
+                    ) {
+                        Text(
+                            text = stringResource(R.string.local_storage_title),
+                            style = MaterialTheme.typography.titleLarge,
+                        )
+                        Text(
+                            text = stringResource(R.string.local_storage_notice),
+                            style = MaterialTheme.typography.bodyMedium,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        )
+                        Text(
+                            text = if (uiState.savePolicy.autoSaveHistory) {
+                                stringResource(R.string.auto_save_on)
+                            } else {
+                                stringResource(R.string.auto_save_off)
+                            },
+                            style = MaterialTheme.typography.labelLarge,
+                            color = MaterialTheme.colorScheme.primary,
+                        )
+                        TextButton(
+                            onClick = onOpenSettings,
+                            modifier = Modifier.height(48.dp),
+                        ) {
+                            Text(stringResource(R.string.open_save_settings))
+                        }
+                        TextButton(
+                            onClick = onOpenMethodIntro,
+                            modifier = Modifier.height(48.dp),
+                        ) {
+                            Text(stringResource(R.string.open_method_intro))
+                        }
+                        TextButton(
+                            onClick = onOpenContentSources,
+                            modifier = Modifier.height(48.dp),
+                        ) {
+                            Text(stringResource(R.string.open_content_sources))
+                        }
+                    }
+                }
+                Spacer(Modifier.height(16.dp))
+                HistorySummary(uiState)
+            }
+        }
+    }
+}
+
+@Composable
+private fun HistorySummary(uiState: HomeUiState) {
+    Card(
+        modifier = Modifier.fillMaxWidth(),
+        colors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surfaceVariant),
+        shape = RoundedCornerShape(20.dp),
+    ) {
+        Column(
+            modifier = Modifier.padding(20.dp),
+            verticalArrangement = Arrangement.spacedBy(8.dp),
+        ) {
+            Text(
+                text = stringResource(R.string.local_records_title),
+                style = MaterialTheme.typography.titleLarge,
+            )
+            if (uiState.latest == null) {
+                Text(
+                    text = stringResource(R.string.no_saved_records),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            } else {
+                val latest = checkNotNull(uiState.latest)
+                val context = LocalContext.current
+                val recordedAt = DateFormat.getMediumDateFormat(context)
+                    .format(Date(latest.createdAtEpochMillis))
+                Text(
+                    text = stringResource(R.string.saved_record_count, uiState.savedCount),
+                    style = MaterialTheme.typography.bodyMedium,
+                )
+                Text(
+                    text = stringResource(R.string.latest_record_date, recordedAt),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                Text(
+                    text = if (latest.movingLineCount == 0) {
+                        stringResource(
+                            R.string.latest_static_hexagram_summary,
+                            HexagramNames.nameFor(latest.primaryHexagramId),
+                            latest.primaryHexagramId,
+                        )
+                    } else {
+                        stringResource(
+                            R.string.latest_hexagram_summary,
+                            HexagramNames.nameFor(latest.primaryHexagramId),
+                            latest.primaryHexagramId,
+                            HexagramNames.nameFor(latest.transformedHexagramId),
+                            latest.transformedHexagramId,
+                        )
+                    },
+                    style = MaterialTheme.typography.bodyLarge,
+                    textAlign = TextAlign.Start,
+                )
+                Text(
+                    text = if (latest.movingLineCount == 0) {
+                        stringResource(R.string.latest_no_moving_lines)
+                    } else {
+                        stringResource(R.string.latest_moving_line_count, latest.movingLineCount)
+                    },
+                    style = MaterialTheme.typography.bodyMedium,
+                )
+                Text(
+                    text = stringResource(R.string.latest_explanation_pending),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+    }
+}

app/src/main/java/net/opcapp/flash/feature/home/HomeViewModel.kt

@@ -0,0 +1,64 @@
+package net.opcapp.flash.feature.home
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import dagger.hilt.android.lifecycle.HiltViewModel
+import javax.inject.Inject
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.stateIn
+import kotlinx.coroutines.launch
+import net.opcapp.flash.core.model.ContentManifest
+import net.opcapp.flash.data.content.HexagramContentRepository
+import net.opcapp.flash.data.history.HistoryRepository
+import net.opcapp.flash.data.history.SavedSessionSummary
+import net.opcapp.flash.data.settings.HistorySavePolicy
+import net.opcapp.flash.data.settings.HistorySettingsRepository
+
+data class HomeUiState(
+    val savedCount: Int = 0,
+    val latest: SavedSessionSummary? = null,
+    val savePolicy: HistorySavePolicy = HistorySavePolicy(),
+    val hasSeenMethodIntro: Boolean = false,
+    val isReady: Boolean = false,
+    val contentManifest: ContentManifest = ContentManifest(
+        contentVersion = "unavailable",
+        digest = "unavailable",
+        sources = emptyList(),
+    ),
+)
+
+@HiltViewModel
+class HomeViewModel @Inject constructor(
+    historyRepository: HistoryRepository,
+    private val settingsRepository: HistorySettingsRepository,
+    contentRepository: HexagramContentRepository,
+) : ViewModel() {
+    private val contentManifest = contentRepository.manifest
+    val uiState: StateFlow<HomeUiState> = combine(
+        historyRepository.observeCount(),
+        historyRepository.observeLatest(),
+        settingsRepository.policy,
+        settingsRepository.hasSeenMethodIntro,
+    ) { savedCount, latest, savePolicy, hasSeenMethodIntro ->
+        HomeUiState(
+            savedCount = savedCount,
+            latest = latest,
+            savePolicy = savePolicy,
+            hasSeenMethodIntro = hasSeenMethodIntro,
+            isReady = true,
+            contentManifest = contentManifest,
+        )
+    }.stateIn(
+        scope = viewModelScope,
+        started = SharingStarted.WhileSubscribed(5_000),
+        initialValue = HomeUiState(),
+    )
+
+    fun markMethodIntroSeen() {
+        viewModelScope.launch {
+            settingsRepository.setHasSeenMethodIntro(true)
+        }
+    }
+}

app/src/main/java/net/opcapp/flash/feature/onboarding/MethodIntroScreen.kt

@@ -0,0 +1,103 @@
+package net.opcapp.flash.feature.onboarding
+
+import androidx.activity.compose.BackHandler
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.safeDrawing
+import androidx.compose.foundation.layout.widthIn
+import androidx.compose.foundation.layout.windowInsetsPadding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Button
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import net.opcapp.flash.R
+
+@Composable
+fun MethodIntroScreen(
+    showBack: Boolean,
+    onContinue: () -> Unit,
+    onBack: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    BackHandler(enabled = showBack, onBack = onBack)
+    Surface(
+        modifier = modifier.fillMaxSize(),
+        color = MaterialTheme.colorScheme.background,
+    ) {
+        Box(contentAlignment = Alignment.TopCenter) {
+            Column(
+                modifier = Modifier
+                    .widthIn(max = 600.dp)
+                    .fillMaxWidth()
+                    .windowInsetsPadding(WindowInsets.safeDrawing)
+                    .verticalScroll(rememberScrollState())
+                    .padding(horizontal = 24.dp, vertical = 12.dp),
+                verticalArrangement = Arrangement.spacedBy(16.dp),
+            ) {
+                if (showBack) {
+                    TextButton(
+                        onClick = onBack,
+                        modifier = Modifier.height(48.dp),
+                    ) {
+                        Text(stringResource(R.string.back))
+                    }
+                } else {
+                    Spacer(Modifier.height(12.dp))
+                }
+                Text(
+                    text = stringResource(R.string.method_intro_kicker),
+                    style = MaterialTheme.typography.labelLarge,
+                    color = MaterialTheme.colorScheme.primary,
+                )
+                Text(
+                    text = stringResource(R.string.method_intro_title),
+                    style = MaterialTheme.typography.headlineMedium,
+                )
+                Text(
+                    text = stringResource(R.string.method_intro_lede),
+                    style = MaterialTheme.typography.bodyLarge,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                MethodPoint(stringResource(R.string.method_intro_you_cast))
+                MethodPoint(stringResource(R.string.method_intro_coin_rule))
+                MethodPoint(stringResource(R.string.method_intro_not_decision))
+                Spacer(Modifier.height(8.dp))
+                Button(
+                    onClick = onContinue,
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .height(56.dp)
+                        .testTag("method_intro_continue"),
+                    shape = RoundedCornerShape(16.dp),
+                ) {
+                    Text(stringResource(R.string.method_intro_start))
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun MethodPoint(text: String) {
+    Text(
+        text = text,
+        style = MaterialTheme.typography.bodyLarge,
+    )
+}

app/src/main/java/net/opcapp/flash/feature/question/QuestionScreen.kt

@@ -0,0 +1,133 @@
+package net.opcapp.flash.feature.question
+
+import androidx.activity.compose.BackHandler
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.safeDrawing
+import androidx.compose.foundation.layout.widthIn
+import androidx.compose.foundation.layout.windowInsetsPadding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Button
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.text.input.KeyboardCapitalization
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.ui.unit.dp
+import net.opcapp.flash.R
+
+@Composable
+fun QuestionScreen(
+    question: String,
+    onQuestionChanged: (String) -> Unit,
+    onContinue: () -> Unit,
+    onBack: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    BackHandler(onBack = onBack)
+    val count = QuestionValidation.characterCount(question)
+    val isValid = QuestionValidation.isValid(question)
+    val isTooLong = count > QuestionValidation.MAX_CHARACTERS
+
+    Surface(
+        modifier = modifier.fillMaxSize(),
+        color = MaterialTheme.colorScheme.background,
+    ) {
+        Box(contentAlignment = Alignment.TopCenter) {
+            Column(
+                modifier = Modifier
+                    .widthIn(max = 600.dp)
+                    .fillMaxWidth()
+                    .windowInsetsPadding(WindowInsets.safeDrawing)
+                    .verticalScroll(rememberScrollState())
+                    .padding(horizontal = 24.dp, vertical = 12.dp),
+                verticalArrangement = Arrangement.spacedBy(16.dp),
+            ) {
+                TextButton(
+                    onClick = onBack,
+                    modifier = Modifier.height(48.dp),
+                ) {
+                    Text(stringResource(R.string.back))
+                }
+                Text(
+                    text = stringResource(R.string.question_step),
+                    style = MaterialTheme.typography.labelLarge,
+                    color = MaterialTheme.colorScheme.primary,
+                )
+                Text(
+                    text = stringResource(R.string.question_title),
+                    style = MaterialTheme.typography.headlineMedium,
+                )
+                Text(
+                    text = stringResource(R.string.question_guidance),
+                    style = MaterialTheme.typography.bodyLarge,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                OutlinedTextField(
+                    value = question,
+                    onValueChange = onQuestionChanged,
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .testTag("question_input"),
+                    label = { Text(stringResource(R.string.question_label)) },
+                    supportingText = {
+                        Text(
+                            text = if (isTooLong) {
+                                stringResource(R.string.question_too_long)
+                            } else {
+                                stringResource(R.string.question_privacy_helper)
+                            },
+                        )
+                    },
+                    isError = isTooLong,
+                    minLines = 4,
+                    maxLines = 8,
+                    keyboardOptions = KeyboardOptions(
+                        capitalization = KeyboardCapitalization.Sentences,
+                        keyboardType = KeyboardType.Text,
+                    ),
+                )
+                Text(
+                    text = stringResource(
+                        R.string.character_count,
+                        count,
+                        QuestionValidation.MAX_CHARACTERS,
+                    ),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = if (isTooLong) {
+                        MaterialTheme.colorScheme.error
+                    } else {
+                        MaterialTheme.colorScheme.onSurfaceVariant
+                    },
+                    modifier = Modifier.align(Alignment.End),
+                )
+                Button(
+                    onClick = onContinue,
+                    enabled = isValid,
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .height(56.dp),
+                    shape = RoundedCornerShape(16.dp),
+                ) {
+                    Text(stringResource(R.string.start_coin_entry))
+                }
+            }
+        }
+    }
+}

app/src/main/java/net/opcapp/flash/feature/question/QuestionValidation.kt

@@ -0,0 +1,12 @@
+package net.opcapp.flash.feature.question
+
+object QuestionValidation {
+    const val MAX_CHARACTERS = 200
+
+    fun characterCount(text: String): Int = text.codePointCount(0, text.length)
+
+    fun isValid(text: String): Boolean {
+        val count = characterCount(text.trim())
+        return count in 1..MAX_CHARACTERS
+    }
+}

app/src/main/java/net/opcapp/flash/feature/result/CastResultScreen.kt

@@ -0,0 +1,572 @@
+package net.opcapp.flash.feature.result
+
+import androidx.activity.compose.BackHandler
+import androidx.compose.foundation.Canvas
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.safeDrawing
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.widthIn
+import androidx.compose.foundation.layout.windowInsetsPadding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.graphics.StrokeCap
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.semantics.contentDescription
+import androidx.compose.ui.semantics.semantics
+import androidx.compose.ui.unit.dp
+import net.opcapp.flash.R
+import net.opcapp.flash.core.model.HexagramContent
+import net.opcapp.flash.core.model.HexagramNames
+import net.opcapp.flash.domain.casting.CastResult
+import net.opcapp.flash.domain.casting.LineValue
+import net.opcapp.flash.domain.casting.Polarity
+import net.opcapp.flash.feature.casting.CastingUiState
+import net.opcapp.flash.feature.casting.HistorySaveStatus
+
+@Composable
+fun CastResultScreen(
+    uiState: CastingUiState,
+    onBackHome: () -> Unit,
+    onStartAgain: () -> Unit,
+    onSave: () -> Unit,
+    onDelete: () -> Unit,
+    onRetry: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    BackHandler(onBack = onBackHome)
+    val result = uiState.result
+
+    Surface(
+        modifier = modifier.fillMaxSize(),
+        color = MaterialTheme.colorScheme.background,
+    ) {
+        Box(contentAlignment = Alignment.TopCenter) {
+            Column(
+                modifier = Modifier
+                    .widthIn(max = 600.dp)
+                    .fillMaxWidth()
+                    .windowInsetsPadding(WindowInsets.safeDrawing)
+                    .verticalScroll(rememberScrollState())
+                    .padding(horizontal = 24.dp, vertical = 12.dp),
+                verticalArrangement = Arrangement.spacedBy(16.dp),
+            ) {
+                TextButton(
+                    onClick = onBackHome,
+                    modifier = Modifier.height(48.dp),
+                ) {
+                    Text(stringResource(R.string.back_home))
+                }
+                if (result == null) {
+                    Text(
+                        text = stringResource(R.string.result_missing),
+                        style = MaterialTheme.typography.headlineMedium,
+                    )
+                } else {
+                    ResultContent(
+                        result = result,
+                        saveStatus = uiState.saveStatus,
+                        primaryContent = uiState.primaryContent,
+                        transformedContent = uiState.transformedContent,
+                        contentError = uiState.contentError,
+                        showSpecialUsage = uiState.showSpecialUsage,
+                        onSave = onSave,
+                        onDelete = onDelete,
+                        onRetry = onRetry,
+                        onStartAgain = onStartAgain,
+                    )
+                }
+                Spacer(Modifier.height(16.dp))
+            }
+        }
+    }
+}
+
+@Composable
+private fun ResultContent(
+    result: CastResult,
+    saveStatus: HistorySaveStatus,
+    primaryContent: HexagramContent?,
+    transformedContent: HexagramContent?,
+    contentError: String?,
+    showSpecialUsage: Boolean,
+    onSave: () -> Unit,
+    onDelete: () -> Unit,
+    onRetry: () -> Unit,
+    onStartAgain: () -> Unit,
+) {
+    val primaryName = HexagramNames.nameFor(result.primaryHexagramId)
+    val transformedName = HexagramNames.nameFor(result.transformedHexagramId)
+    Text(
+        text = stringResource(R.string.result_kicker),
+        style = MaterialTheme.typography.labelLarge,
+        color = MaterialTheme.colorScheme.primary,
+    )
+    Text(
+        text = if (result.movingLinePositions.isEmpty()) {
+            stringResource(
+                R.string.static_result_title,
+                primaryName,
+                result.primaryHexagramId.value,
+            )
+        } else {
+            stringResource(
+                R.string.moving_result_title,
+                primaryName,
+                result.primaryHexagramId.value,
+                transformedName,
+                result.transformedHexagramId.value,
+            )
+        },
+        style = MaterialTheme.typography.headlineMedium,
+    )
+    Text(
+        text = movingLinesText(result.movingLinePositions),
+        style = MaterialTheme.typography.titleLarge,
+        color = if (result.movingLinePositions.isEmpty()) {
+            MaterialTheme.colorScheme.onSurfaceVariant
+        } else {
+            MaterialTheme.colorScheme.primary
+        },
+    )
+    Row(
+        modifier = Modifier.fillMaxWidth(),
+        horizontalArrangement = Arrangement.SpaceEvenly,
+    ) {
+        HexagramDiagram(
+            linesBottomUp = result.primaryPatternBottomUp.linesBottomUp,
+            movingPositions = result.movingLinePositions,
+            description = stringResource(
+                R.string.primary_hexagram_accessibility,
+                primaryName,
+                result.primaryHexagramId.value,
+            ),
+        )
+        if (result.movingLinePositions.isNotEmpty()) {
+            HexagramDiagram(
+                linesBottomUp = result.transformedPatternBottomUp.linesBottomUp,
+                movingPositions = emptyList(),
+                description = stringResource(
+                    R.string.transformed_hexagram_accessibility,
+                    transformedName,
+                    result.transformedHexagramId.value,
+                ),
+            )
+        }
+    }
+    RawLinesCard(result.lineValuesBottomUp)
+    HexagramTextsCard(
+        result = result,
+        primaryContent = primaryContent,
+        transformedContent = transformedContent,
+        contentError = contentError,
+        showSpecialUsage = showSpecialUsage,
+    )
+    SaveStatusCard(
+        status = saveStatus,
+        onSave = onSave,
+        onDelete = onDelete,
+        onRetry = onRetry,
+    )
+    Text(
+        text = stringResource(R.string.content_plain_draft_notice),
+        style = MaterialTheme.typography.bodyMedium,
+        color = MaterialTheme.colorScheme.onSurfaceVariant,
+    )
+    Button(
+        onClick = onStartAgain,
+        modifier = Modifier
+            .fillMaxWidth()
+            .height(56.dp),
+        shape = RoundedCornerShape(16.dp),
+    ) {
+        Text(stringResource(R.string.start_again))
+    }
+}
+
+@Composable
+private fun HexagramTextsCard(
+    result: CastResult,
+    primaryContent: HexagramContent?,
+    transformedContent: HexagramContent?,
+    contentError: String?,
+    showSpecialUsage: Boolean,
+) {
+    Card(
+        modifier = Modifier.fillMaxWidth(),
+        colors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surface),
+        shape = RoundedCornerShape(20.dp),
+    ) {
+        Column(
+            modifier = Modifier.padding(20.dp),
+            verticalArrangement = Arrangement.spacedBy(12.dp),
+        ) {
+            if (contentError != null || primaryContent == null) {
+                Text(
+                    text = stringResource(R.string.content_integrity_error),
+                    style = MaterialTheme.typography.bodyLarge,
+                    color = MaterialTheme.colorScheme.error,
+                )
+                return@Column
+            }
+            LabeledPassage(
+                title = stringResource(R.string.primary_judgment_title),
+                original = primaryContent.judgmentOriginal,
+                plain = primaryContent.judgmentPlain,
+            )
+            if (result.movingLinePositions.isNotEmpty()) {
+                Text(
+                    text = stringResource(R.string.moving_line_texts_title),
+                    style = MaterialTheme.typography.titleLarge,
+                )
+                result.movingLinePositions.forEach { position ->
+                    LabeledPassage(
+                        title = linePositionName(position),
+                        original = primaryContent.lineTextsBottomUp[position - 1],
+                        plain = primaryContent.linePlainBottomUp[position - 1],
+                    )
+                }
+            }
+            if (
+                transformedContent != null &&
+                result.transformedHexagramId != result.primaryHexagramId
+            ) {
+                LabeledPassage(
+                    title = stringResource(R.string.transformed_judgment_title),
+                    original = transformedContent.judgmentOriginal,
+                    plain = transformedContent.judgmentPlain,
+                )
+            }
+            if (showSpecialUsage && primaryContent.specialUsageText != null) {
+                LabeledPassage(
+                    title = stringResource(R.string.special_usage_title),
+                    original = primaryContent.specialUsageText,
+                    plain = null,
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun LabeledPassage(
+    title: String,
+    original: String,
+    plain: String?,
+) {
+    Column(verticalArrangement = Arrangement.spacedBy(6.dp)) {
+        Text(
+            text = title,
+            style = MaterialTheme.typography.titleLarge,
+        )
+        Text(
+            text = stringResource(R.string.content_original_label),
+            style = MaterialTheme.typography.labelLarge,
+            color = MaterialTheme.colorScheme.primary,
+        )
+        Text(
+            text = original,
+            style = MaterialTheme.typography.bodyLarge,
+        )
+        if (plain != null) {
+            Text(
+                text = stringResource(R.string.content_plain_label),
+                style = MaterialTheme.typography.labelLarge,
+                color = MaterialTheme.colorScheme.primary,
+            )
+            Text(
+                text = plain,
+                style = MaterialTheme.typography.bodyLarge,
+            )
+        }
+    }
+}
+
+@Composable
+private fun RawLinesCard(lines: List<LineValue>) {
+    Card(
+        modifier = Modifier.fillMaxWidth(),
+        colors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surface),
+        shape = RoundedCornerShape(20.dp),
+    ) {
+        Column(
+            modifier = Modifier.padding(20.dp),
+            verticalArrangement = Arrangement.spacedBy(8.dp),
+        ) {
+            Text(
+                text = stringResource(R.string.raw_lines_title),
+                style = MaterialTheme.typography.titleLarge,
+            )
+            lines.forEachIndexed { index, line ->
+                Text(
+                    text = stringResource(
+                        R.string.raw_line_summary,
+                        linePositionName(index + 1),
+                        line.score,
+                        lineValueName(line),
+                        if (line.isMoving) {
+                            stringResource(R.string.moving_line)
+                        } else {
+                            stringResource(R.string.static_line)
+                        },
+                    ),
+                    style = MaterialTheme.typography.bodyLarge,
+                    color = if (line.isMoving) {
+                        MaterialTheme.colorScheme.primary
+                    } else {
+                        MaterialTheme.colorScheme.onSurface
+                    },
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun SaveStatusCard(
+    status: HistorySaveStatus,
+    onSave: () -> Unit,
+    onDelete: () -> Unit,
+    onRetry: () -> Unit,
+) {
+    var confirmDelete by remember { mutableStateOf(false) }
+    LaunchedEffect(status) {
+        if (status !is HistorySaveStatus.Saved) {
+            confirmDelete = false
+        }
+    }
+
+    Card(
+        modifier = Modifier.fillMaxWidth(),
+        colors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surfaceVariant),
+        shape = RoundedCornerShape(20.dp),
+    ) {
+        Column(
+            modifier = Modifier.padding(20.dp),
+            verticalArrangement = Arrangement.spacedBy(8.dp),
+        ) {
+            Row(
+                horizontalArrangement = Arrangement.spacedBy(12.dp),
+                verticalAlignment = Alignment.CenterVertically,
+            ) {
+                if (status is HistorySaveStatus.Saving || status is HistorySaveStatus.Deleting) {
+                    CircularProgressIndicator(modifier = Modifier.size(20.dp), strokeWidth = 2.dp)
+                }
+                Text(
+                    text = saveStatusText(status),
+                    style = MaterialTheme.typography.titleLarge,
+                )
+            }
+            Text(
+                text = stringResource(R.string.save_status_privacy),
+                style = MaterialTheme.typography.bodyMedium,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+            when (status) {
+                HistorySaveStatus.NotSaved -> OutlinedButton(
+                    onClick = onSave,
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .height(48.dp),
+                ) {
+                    Text(stringResource(R.string.save_this_time))
+                }
+
+                is HistorySaveStatus.Saved -> if (confirmDelete) {
+                    Text(
+                        text = stringResource(R.string.delete_current_record_title),
+                        style = MaterialTheme.typography.bodyLarge,
+                    )
+                    Text(
+                        text = stringResource(R.string.delete_current_record_message),
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                    TextButton(
+                        onClick = onDelete,
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .height(56.dp)
+                            .testTag("confirm_delete_record"),
+                    ) {
+                        Text(
+                            text = stringResource(R.string.delete_record),
+                            color = MaterialTheme.colorScheme.error,
+                        )
+                    }
+                    TextButton(
+                        onClick = { confirmDelete = false },
+                        modifier = Modifier.height(48.dp),
+                    ) {
+                        Text(stringResource(R.string.cancel))
+                    }
+                } else {
+                    TextButton(
+                        onClick = { confirmDelete = true },
+                        modifier = Modifier
+                            .height(48.dp)
+                            .testTag("do_not_save_this_time"),
+                    ) {
+                        Text(
+                            text = stringResource(R.string.do_not_save_this_time),
+                            color = MaterialTheme.colorScheme.error,
+                        )
+                    }
+                }
+
+                is HistorySaveStatus.Failed -> OutlinedButton(
+                    onClick = onRetry,
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .height(48.dp),
+                ) {
+                    Text(stringResource(R.string.retry))
+                }
+
+                else -> Unit
+            }
+        }
+    }
+}
+
+@Composable
+private fun saveStatusText(status: HistorySaveStatus): String = when (status) {
+    HistorySaveStatus.Draft -> stringResource(R.string.save_status_preparing)
+    HistorySaveStatus.Saving -> stringResource(R.string.save_status_saving)
+    HistorySaveStatus.Deleting -> stringResource(R.string.save_status_deleting)
+    HistorySaveStatus.NotSaved -> stringResource(R.string.save_status_not_saved)
+    is HistorySaveStatus.Saved -> if (status.questionSaved) {
+        stringResource(R.string.save_status_saved_complete)
+    } else {
+        stringResource(R.string.save_status_saved_without_question)
+    }
+
+    is HistorySaveStatus.Failed -> when (status.operation) {
+        HistorySaveStatus.Failed.Operation.SAVE -> stringResource(R.string.save_status_failed)
+        HistorySaveStatus.Failed.Operation.DELETE -> stringResource(R.string.delete_status_failed)
+    }
+}
+
+@Composable
+private fun movingLinesText(positions: List<Int>): String =
+    if (positions.isEmpty()) {
+        stringResource(R.string.no_moving_lines)
+    } else {
+        var positionNames = ""
+        for (position in positions) {
+            if (positionNames.isNotEmpty()) positionNames += "、"
+            positionNames += linePositionName(position)
+        }
+        stringResource(
+            R.string.moving_lines_summary,
+            positionNames,
+        )
+    }
+
+@Composable
+private fun linePositionName(position: Int): String = when (position) {
+    1 -> stringResource(R.string.line_first)
+    2 -> stringResource(R.string.line_second)
+    3 -> stringResource(R.string.line_third)
+    4 -> stringResource(R.string.line_fourth)
+    5 -> stringResource(R.string.line_fifth)
+    6 -> stringResource(R.string.line_top)
+    else -> error("Line position must be 1..6")
+}
+
+@Composable
+private fun lineValueName(line: LineValue): String = when (line) {
+    LineValue.OLD_YIN -> stringResource(R.string.old_yin)
+    LineValue.YOUNG_YANG -> stringResource(R.string.young_yang)
+    LineValue.YOUNG_YIN -> stringResource(R.string.young_yin)
+    LineValue.OLD_YANG -> stringResource(R.string.old_yang)
+}
+
+@Composable
+private fun HexagramDiagram(
+    linesBottomUp: List<Polarity>,
+    movingPositions: List<Int>,
+    description: String,
+) {
+    val ink = MaterialTheme.colorScheme.onBackground
+    val movingInk = MaterialTheme.colorScheme.primary
+    val lineWidth = with(LocalDensity.current) { 58.dp.toPx() }
+    val gap = with(LocalDensity.current) { 12.dp.toPx() }
+    val strokeWidth = with(LocalDensity.current) { 5.dp.toPx() }
+    val markerRadius = with(LocalDensity.current) { 4.dp.toPx() }
+
+    Canvas(
+        modifier = Modifier
+            .size(width = 100.dp, height = 136.dp)
+            .semantics { contentDescription = description },
+    ) {
+        val verticalStep = size.height / 6f
+        linesBottomUp.forEachIndexed { index, polarity ->
+            val y = size.height - verticalStep * (index + 0.5f)
+            val left = (size.width - lineWidth) / 2f
+            val right = left + lineWidth
+            val color = if (index + 1 in movingPositions) movingInk else ink
+            if (polarity == Polarity.YANG) {
+                drawLine(
+                    color = color,
+                    start = Offset(left, y),
+                    end = Offset(right, y),
+                    strokeWidth = strokeWidth,
+                    cap = StrokeCap.Square,
+                )
+            } else {
+                val center = size.width / 2f
+                drawLine(
+                    color = color,
+                    start = Offset(left, y),
+                    end = Offset(center - gap / 2f, y),
+                    strokeWidth = strokeWidth,
+                    cap = StrokeCap.Square,
+                )
+                drawLine(
+                    color = color,
+                    start = Offset(center + gap / 2f, y),
+                    end = Offset(right, y),
+                    strokeWidth = strokeWidth,
+                    cap = StrokeCap.Square,
+                )
+            }
+            if (index + 1 in movingPositions) {
+                drawCircle(
+                    color = movingInk,
+                    radius = markerRadius,
+                    center = Offset(right + gap, y),
+                )
+            }
+        }
+    }
+}

app/src/main/java/net/opcapp/flash/feature/settings/HistorySettingsScreen.kt

@@ -0,0 +1,185 @@
+package net.opcapp.flash.feature.settings
+
+import androidx.activity.compose.BackHandler
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.safeDrawing
+import androidx.compose.foundation.layout.widthIn
+import androidx.compose.foundation.layout.windowInsetsPadding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.selection.toggleable
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Card
+import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Switch
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.semantics.Role
+import androidx.compose.ui.semantics.disabled
+import androidx.compose.ui.semantics.semantics
+import androidx.compose.ui.unit.dp
+import net.opcapp.flash.R
+import net.opcapp.flash.data.settings.HistorySavePolicy
+
+@Composable
+fun HistorySettingsScreen(
+    policy: HistorySavePolicy,
+    onAutoSaveChanged: (Boolean) -> Unit,
+    onSaveQuestionChanged: (Boolean) -> Unit,
+    onSaveExplanationChanged: (Boolean) -> Unit,
+    onSaveActionChanged: (Boolean) -> Unit,
+    onBack: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    BackHandler(onBack = onBack)
+    Surface(
+        modifier = modifier.fillMaxSize(),
+        color = MaterialTheme.colorScheme.background,
+    ) {
+        Box(contentAlignment = Alignment.TopCenter) {
+            Column(
+                modifier = Modifier
+                    .widthIn(max = 600.dp)
+                    .fillMaxWidth()
+                    .windowInsetsPadding(WindowInsets.safeDrawing)
+                    .verticalScroll(rememberScrollState())
+                    .padding(horizontal = 24.dp, vertical = 12.dp),
+                verticalArrangement = Arrangement.spacedBy(16.dp),
+            ) {
+                TextButton(
+                    onClick = onBack,
+                    modifier = Modifier.height(48.dp),
+                ) {
+                    Text(stringResource(R.string.back))
+                }
+                Text(
+                    text = stringResource(R.string.save_settings_title),
+                    style = MaterialTheme.typography.headlineMedium,
+                )
+                Text(
+                    text = stringResource(R.string.save_settings_description),
+                    style = MaterialTheme.typography.bodyLarge,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                Card(
+                    modifier = Modifier.fillMaxWidth(),
+                    colors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surface),
+                    shape = RoundedCornerShape(20.dp),
+                ) {
+                    Column {
+                        SettingsToggle(
+                            title = stringResource(R.string.auto_save_complete_record),
+                            description = stringResource(R.string.auto_save_complete_record_description),
+                            checked = policy.autoSaveHistory,
+                            testTag = "auto_save_history",
+                            onCheckedChange = onAutoSaveChanged,
+                        )
+                        SettingsToggle(
+                            title = stringResource(R.string.save_question_text),
+                            description = stringResource(R.string.save_question_text_description),
+                            checked = policy.saveQuestionText,
+                            enabled = policy.autoSaveHistory,
+                            onCheckedChange = onSaveQuestionChanged,
+                        )
+                        SettingsToggle(
+                            title = stringResource(R.string.save_explanation_content),
+                            description = stringResource(R.string.save_explanation_content_description),
+                            checked = policy.saveExplanationContent,
+                            enabled = policy.autoSaveHistory,
+                            onCheckedChange = onSaveExplanationChanged,
+                        )
+                        SettingsToggle(
+                            title = stringResource(R.string.save_action_note),
+                            description = stringResource(R.string.save_action_note_description),
+                            checked = policy.saveActionNote,
+                            enabled = policy.autoSaveHistory,
+                            onCheckedChange = onSaveActionChanged,
+                        )
+                    }
+                }
+                if (!policy.autoSaveHistory) {
+                    Text(
+                        text = stringResource(R.string.disabled_settings_explanation),
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+                Text(
+                    text = stringResource(R.string.no_cloud_backup_notice),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun SettingsToggle(
+    title: String,
+    description: String,
+    checked: Boolean,
+    onCheckedChange: (Boolean) -> Unit,
+    enabled: Boolean = true,
+    testTag: String? = null,
+) {
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .then(if (testTag == null) Modifier else Modifier.testTag(testTag))
+            .then(
+                if (enabled) {
+                    Modifier.toggleable(
+                        value = checked,
+                        role = Role.Switch,
+                        onValueChange = onCheckedChange,
+                    )
+                } else {
+                    Modifier.semantics { disabled() }
+                },
+            )
+            .padding(horizontal = 20.dp, vertical = 16.dp),
+        verticalAlignment = Alignment.CenterVertically,
+        horizontalArrangement = Arrangement.spacedBy(16.dp),
+    ) {
+        Column(
+            modifier = Modifier.weight(1f),
+            verticalArrangement = Arrangement.spacedBy(4.dp),
+        ) {
+            Text(
+                text = title,
+                style = MaterialTheme.typography.bodyLarge,
+                color = if (enabled) {
+                    MaterialTheme.colorScheme.onSurface
+                } else {
+                    MaterialTheme.colorScheme.onSurfaceVariant
+                },
+            )
+            Text(
+                text = description,
+                style = MaterialTheme.typography.bodyMedium,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+        }
+        Switch(
+            checked = checked,
+            onCheckedChange = null,
+            enabled = enabled,
+        )
+    }
+}

app/src/main/java/net/opcapp/flash/feature/settings/HistorySettingsViewModel.kt

@@ -0,0 +1,43 @@
+package net.opcapp.flash.feature.settings
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import dagger.hilt.android.lifecycle.HiltViewModel
+import javax.inject.Inject
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.stateIn
+import kotlinx.coroutines.launch
+import net.opcapp.flash.data.settings.HistorySavePolicy
+import net.opcapp.flash.data.settings.HistorySettingsRepository
+
+@HiltViewModel
+class HistorySettingsViewModel @Inject constructor(
+    private val repository: HistorySettingsRepository,
+) : ViewModel() {
+    val policy: StateFlow<HistorySavePolicy> = repository.policy.stateIn(
+        scope = viewModelScope,
+        started = SharingStarted.WhileSubscribed(5_000),
+        initialValue = HistorySavePolicy(),
+    )
+
+    fun setAutoSaveHistory(enabled: Boolean) = update {
+        repository.setAutoSaveHistory(enabled)
+    }
+
+    fun setSaveQuestionText(enabled: Boolean) = update {
+        repository.setSaveQuestionText(enabled)
+    }
+
+    fun setSaveExplanationContent(enabled: Boolean) = update {
+        repository.setSaveExplanationContent(enabled)
+    }
+
+    fun setSaveActionNote(enabled: Boolean) = update {
+        repository.setSaveActionNote(enabled)
+    }
+
+    private fun update(block: suspend () -> Unit) {
+        viewModelScope.launch { block() }
+    }
+}

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

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="Theme.Lingji" parent="android:style/Theme.Material.NoActionBar">
+        <item name="android:fontFamily">sans</item>
+        <item name="android:statusBarColor">#1E1B18</item>
+        <item name="android:navigationBarColor">#1E1B18</item>
+        <item name="android:windowLightStatusBar">false</item>
+        <item name="android:windowActionModeOverlay">true</item>
+    </style>
+</resources>

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

@@ -0,0 +1,129 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">灵机</string>
+    <string name="home_kicker">三枚铜币 · 六爻由下而上</string>
+    <string name="home_lede">你投币，应用记录；结果用于整理想法，不替你预测或决定。</string>
+    <string name="seal_character">易</string>
+    <string name="start_casting">开始一问</string>
+    <string name="local_storage_title">你的数据留在本机</string>
+    <string name="local_storage_notice">起卦与历史默认保存在本机，不主动上传。只有你选择 AI 解读时，本次所需内容才会发送。</string>
+    <string name="auto_save_on">自动保存完整记录：已开启</string>
+    <string name="auto_save_off">自动保存完整记录：已关闭</string>
+    <string name="open_save_settings">管理保存设置</string>
+    <string name="open_method_intro">方法说明</string>
+    <string name="local_records_title">你的观照</string>
+    <string name="no_saved_records">还没有已完成的记录。未完成的问题和投币不会进入长期历史。</string>
+    <string name="saved_record_count">已保存 %1$d 次起卦</string>
+    <string name="latest_record_date">最近一次 · %1$s</string>
+    <string name="latest_hexagram_summary">%1$s %2$d → %3$s %4$d</string>
+    <string name="latest_static_hexagram_summary">%1$s %2$d</string>
+    <string name="latest_moving_line_count">%1$d 个动爻</string>
+    <string name="latest_no_moving_lines">无动爻</string>
+    <string name="latest_explanation_pending">尚未解读</string>
+
+    <string name="method_intro_kicker">第一次起卦前</string>
+    <string name="method_intro_title">把一个犹豫，安静地放在这里。</string>
+    <string name="method_intro_lede">应用只记录你亲手投出的铜币，并在本机算出本卦、之卦和动爻。</string>
+    <string name="method_intro_you_cast">你投币，应用记录；AI 不参与起卦。</string>
+    <string name="method_intro_coin_rule">字为 2，背为 3；第一次是初爻，由下而上。</string>
+    <string name="method_intro_not_decision">结果用于整理想法，不替你做决定。</string>
+    <string name="method_intro_start">开始</string>
+
+    <string name="back">返回</string>
+    <string name="back_home">返回首页</string>
+    <string name="back_to_question">返回修改问题</string>
+    <string name="question_step">起念 · 第一步</string>
+    <string name="question_title">此刻，想慢下来看看什么？</string>
+    <string name="question_guidance">尽量写成一个具体、可由自己采取行动的问题。这里不是预测，也不替你做决定。</string>
+    <string name="question_label">此刻想问的事</string>
+    <string name="question_privacy_helper">1–200 字。完成后按保存设置留在本机，不会因为保存而上传。</string>
+    <string name="question_too_long">超过 200 字，请缩短后继续。</string>
+    <string name="character_count">%1$d / %2$d 字</string>
+    <string name="start_coin_entry">开始录入铜币</string>
+
+    <string name="casting_step">投币 · 第 %1$d 爻</string>
+    <string name="casting_title">依次录入三枚铜币</string>
+    <string name="coin_convention_visible">固定计值：字 2，背 3。请真实投掷后逐枚选择，应用不代投。</string>
+    <string name="round_progress">已确认 %1$d / %2$d 爻</string>
+    <string name="current_line_title">正在录入：%1$s</string>
+    <string name="coin_index">第 %1$d 枚</string>
+    <string name="coin_character">字 2</string>
+    <string name="coin_reverse">背 3</string>
+    <string name="current_line_preview">和值 %1$d · %2$s · %3$s</string>
+    <string name="select_all_three_coins">选完三枚后，将在这里显示本爻的和值与动静。</string>
+    <string name="confirm_this_line">确认本爻</string>
+    <string name="confirm_and_finish">确认上爻并成卦</string>
+    <string name="confirmed_lines_title">已确认（由下而上）</string>
+    <string name="confirmed_line_summary">%1$s · %2$d %3$s</string>
+    <string name="rerecord_from_line">从此重录</string>
+    <string name="moving_line">动爻</string>
+    <string name="static_line">静爻</string>
+    <string name="line_first">初爻</string>
+    <string name="line_second">二爻</string>
+    <string name="line_third">三爻</string>
+    <string name="line_fourth">四爻</string>
+    <string name="line_fifth">五爻</string>
+    <string name="line_top">上爻</string>
+    <string name="old_yin">老阴</string>
+    <string name="young_yang">少阳</string>
+    <string name="young_yin">少阴</string>
+    <string name="old_yang">老阳</string>
+
+    <string name="save_settings_title">本机保存设置</string>
+    <string name="save_settings_description">这些开关只控制应用私有存储，不构成上传或 AI 授权。</string>
+    <string name="auto_save_complete_record">自动保存完整记录</string>
+    <string name="auto_save_complete_record_description">第六爻确认后立即创建本机会话。</string>
+    <string name="save_question_text">保存问题原文</string>
+    <string name="save_question_text_description">关闭后仍保存可复核卦象，但不保存你写的问题。</string>
+    <string name="save_explanation_content">保存解读全文</string>
+    <string name="save_explanation_content_description">解读功能接入后，按此选择关联到同一会话。</string>
+    <string name="save_action_note">保存行动记录</string>
+    <string name="save_action_note_description">行动记录功能接入后，按此选择保存在本机。</string>
+    <string name="disabled_settings_explanation">总开关关闭时，三个内容选择保留但暂不参与自动保存；重新开启后恢复。</string>
+    <string name="no_cloud_backup_notice">历史数据库已排除系统自动备份和设备迁移；当前版本不提供账号、导出或云同步。</string>
+
+    <string name="result_kicker">本地计算完成</string>
+    <string name="moving_result_title">%1$s %2$d → %3$s %4$d</string>
+    <string name="static_result_title">%1$s %2$d</string>
+    <string name="moving_lines_summary">动爻：%1$s</string>
+    <string name="no_moving_lines">无动爻，本卦不变</string>
+    <string name="primary_hexagram_accessibility">本卦 %1$s，第 %2$d 卦</string>
+    <string name="transformed_hexagram_accessibility">之卦 %1$s，第 %2$d 卦</string>
+    <string name="raw_lines_title">六爻复核（由下而上）</string>
+    <string name="raw_line_summary">%1$s · %2$d %3$s · %4$s</string>
+    <string name="save_status_privacy">保存仅发生在应用私有本机数据库中，不会触发网络请求。</string>
+    <string name="save_status_preparing">正在准备记录</string>
+    <string name="save_status_saving">正在保存到本机</string>
+    <string name="save_status_deleting">正在删除本机记录</string>
+    <string name="save_status_not_saved">本次尚未保存</string>
+    <string name="save_status_saved_complete">已自动保存完整记录到本机</string>
+    <string name="save_status_saved_without_question">卦象已保存到本机，问题原文未保存</string>
+    <string name="save_status_failed">保存失败，原始结果仍可查看</string>
+    <string name="delete_status_failed">删除失败，请重试</string>
+    <string name="save_this_time">保存本次</string>
+    <string name="do_not_save_this_time">本次不保存</string>
+    <string name="retry">重试</string>
+    <string name="content_original_label">原文</string>
+    <string name="content_plain_label">本地白话</string>
+    <string name="content_plain_draft_notice">白话为项目自撰草稿，供本机阅读；内容负责人审校前不视为可再分发。</string>
+    <string name="primary_judgment_title">本卦卦辞</string>
+    <string name="transformed_judgment_title">之卦卦辞</string>
+    <string name="moving_line_texts_title">动爻爻辞</string>
+    <string name="special_usage_title">用九 / 用六</string>
+    <string name="content_integrity_error">本地内容包未能通过完整性检查，卦辞暂不可读。卦号、卦名和六爻事实仍可复核。</string>
+    <string name="open_content_sources">内容来源</string>
+    <string name="content_sources_title">内容来源</string>
+    <string name="content_sources_lede">应用只使用已写入安装包的本地文本。原文来自可核验公版《易经》；白话由本项目撰写，审校完成前标为草稿。</string>
+    <string name="content_version_label">内容版本：%1$s</string>
+    <string name="content_digest_label">校验摘要：%1$s</string>
+    <string name="content_source_license">许可：%1$s</string>
+    <string name="content_source_edition">版本：%1$s</string>
+    <string name="content_source_url">来源：%1$s</string>
+    <string name="content_review_pending">内容负责人尚未确认本包可再分发；发布前须完成审校。</string>
+    <string name="start_again">再起一卦</string>
+    <string name="result_missing">结果状态已丢失，请返回首页重新开始。</string>
+    <string name="delete_current_record_title">删除本次本机记录？</string>
+    <string name="delete_current_record_message">将删除已经自动保存的问题和卦象快照，不改变全局保存设置。</string>
+    <string name="delete_record">删除记录</string>
+    <string name="cancel">取消</string>
+</resources>

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

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="Theme.Lingji" parent="android:style/Theme.Material.Light.NoActionBar">
+        <item name="android:fontFamily">sans</item>
+        <item name="android:statusBarColor">#F5F0E6</item>
+        <item name="android:navigationBarColor">#F5F0E6</item>
+        <item name="android:windowLightStatusBar">true</item>
+        <item name="android:windowActionModeOverlay">true</item>
+    </style>
+</resources>

app/src/main/res/xml/backup_rules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<full-backup-content>
+    <exclude domain="root" path="." />
+    <exclude domain="file" path="." />
+    <exclude domain="database" path="." />
+    <exclude domain="sharedpref" path="." />
+    <exclude domain="external" path="." />
+</full-backup-content>

app/src/main/res/xml/data_extraction_rules.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<data-extraction-rules>
+    <cloud-backup disableIfNoEncryptionCapabilities="true">
+        <exclude domain="root" path="." />
+        <exclude domain="file" path="." />
+        <exclude domain="database" path="." />
+        <exclude domain="sharedpref" path="." />
+        <exclude domain="external" path="." />
+    </cloud-backup>
+    <device-transfer>
+        <exclude domain="root" path="." />
+        <exclude domain="file" path="." />
+        <exclude domain="database" path="." />
+        <exclude domain="sharedpref" path="." />
+        <exclude domain="external" path="." />
+    </device-transfer>
+</data-extraction-rules>

app/src/test/java/net/opcapp/flash/core/model/HexagramNamesTest.kt

@@ -0,0 +1,14 @@
+package net.opcapp.flash.core.model
+
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class HexagramNamesTest {
+    @Test
+    fun knownKingWenNamesAreStable() {
+        assertEquals("乾", HexagramNames.nameFor(1))
+        assertEquals("坤", HexagramNames.nameFor(2))
+        assertEquals("复", HexagramNames.nameFor(24))
+        assertEquals("未济", HexagramNames.nameFor(64))
+    }
+}

app/src/test/java/net/opcapp/flash/data/content/FakeHexagramContentRepository.kt

@@ -1,13 +1,23 @@
-package brainwave.data.content
+package net.opcapp.flash.data.content
 
-import brainwave.core.model.HexagramContent
+import net.opcapp.flash.core.model.ContentManifest
+import net.opcapp.flash.core.model.ContentSource
+import net.opcapp.flash.core.model.HexagramContent
 
 class FakeHexagramContentRepository(
     override val contentVersion: String = "fixture-only-v1",
     entries: List<HexagramContent>,
+    sources: List<ContentSource> = emptyList(),
+    digest: String = "fixture-digest",
 ) : HexagramContentRepository {
     private val entriesById: Map<Int, HexagramContent>
 
+    override val manifest: ContentManifest = ContentManifest(
+        contentVersion = contentVersion,
+        digest = digest,
+        sources = sources,
+    )
+
     init {
         require(contentVersion.isNotBlank()) { "Content version must not be blank" }
         require(entries.map(HexagramContent::kingWenNumber).distinct().size == entries.size) {

app/src/test/java/net/opcapp/flash/data/content/HexagramContentParserTest.kt

@@ -0,0 +1,39 @@
+package net.opcapp.flash.data.content
+
+import net.opcapp.flash.core.model.HexagramNames
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNotNull
+import org.junit.Assert.assertTrue
+import org.junit.Assert.fail
+import org.junit.Test
+
+class HexagramContentParserTest {
+    @Test
+    fun publishedPackageMatchesKingWenNamesAndSpecialUsage() {
+        val json = checkNotNull(javaClass.getResource("/hexagram-content.json")).readText()
+        val pack = HexagramContentParser.parse(json)
+
+        assertEquals("zh-Hans-2026.1", pack.manifest.contentVersion)
+        assertEquals(64, pack.hexagrams.size)
+        assertTrue(pack.manifest.digest.matches(Regex("[a-f0-9]{64}")))
+        assertEquals("复", pack.hexagrams.getValue(24).name)
+        assertEquals(HexagramNames.nameFor(24), pack.hexagrams.getValue(24).name)
+        assertEquals("䷗", pack.hexagrams.getValue(24).symbol)
+        assertTrue(pack.hexagrams.getValue(1).specialUsageText.orEmpty().contains("用九"))
+        assertTrue(pack.hexagrams.getValue(2).specialUsageText.orEmpty().contains("用六"))
+        assertNotNull(pack.manifest.sources.singleOrNull { it.id.contains("wikisource") })
+        assertNotNull(pack.manifest.sources.singleOrNull { it.id.contains("lingji-plain") })
+    }
+
+    @Test
+    fun parserRejectsWrongKingWenName() {
+        val json = checkNotNull(javaClass.getResource("/hexagram-content.json")).readText()
+            .replace("\"name\": \"复\"", "\"name\": \"錯\"")
+        try {
+            HexagramContentParser.parse(json)
+            fail("Expected content integrity failure")
+        } catch (error: ContentIntegrityException) {
+            assertTrue(error.message.orEmpty().contains("name"))
+        }
+    }
+}

app/src/test/java/net/opcapp/flash/data/content/HexagramContentRepositoryTest.kt

@@ -1,6 +1,6 @@
-package brainwave.data.content
+package net.opcapp.flash.data.content
 
-import brainwave.core.model.HexagramContent
+import net.opcapp.flash.core.model.HexagramContent
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertTrue
 import org.junit.Assert.fail

app/src/test/java/net/opcapp/flash/data/history/HistoryRecordCodecTest.kt

@@ -0,0 +1,85 @@
+package net.opcapp.flash.data.history
+
+import net.opcapp.flash.domain.casting.CastEngine
+import net.opcapp.flash.domain.casting.CastMetadata
+import net.opcapp.flash.domain.casting.CastResult
+import net.opcapp.flash.domain.casting.CastRound
+import net.opcapp.flash.domain.casting.LineValue
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertThrows
+import org.junit.Test
+
+class HistoryRecordCodecTest {
+    private val result = CastResult.record(
+        computation = CastEngine.cast(
+            listOf(
+                CastRound.fromLineValue(LineValue.OLD_YANG),
+                CastRound.fromLineValue(LineValue.YOUNG_YIN),
+                CastRound.fromLineValue(LineValue.YOUNG_YIN),
+                CastRound.fromLineValue(LineValue.YOUNG_YIN),
+                CastRound.fromLineValue(LineValue.YOUNG_YIN),
+                CastRound.fromLineValue(LineValue.YOUNG_YIN),
+            ),
+        ),
+        metadata = CastMetadata(
+            contentVersion = "hexagram-names-v1",
+            createdAt = "2026-08-08T00:00:00Z",
+        ),
+    )
+
+    @Test
+    fun entityRoundTripRecomputesAndPreservesTheCast() {
+        val entity = HistoryRecordCodec.toEntity(
+            id = "fixture-session",
+            result = result,
+            questionText = "我该先验证哪个假设？",
+            saveQuestionText = true,
+        )
+
+        val restored = HistoryRecordCodec.toDomain(entity)
+
+        assertEquals(result, restored)
+        assertEquals("我该先验证哪个假设？", entity.questionText)
+    }
+
+    @Test
+    fun questionIsNotCopiedWhenItsPolicyIsOff() {
+        val entity = HistoryRecordCodec.toEntity(
+            id = "fixture-session",
+            result = result,
+            questionText = "敏感问题夹具",
+            saveQuestionText = false,
+        )
+
+        assertNull(entity.questionText)
+        assertEquals(false, entity.questionSaved)
+    }
+
+    @Test
+    fun missingQuestionIsNeverMarkedAsSaved() {
+        val entity = HistoryRecordCodec.toEntity(
+            id = "fixture-session",
+            result = result,
+            questionText = null,
+            saveQuestionText = true,
+        )
+
+        assertNull(entity.questionText)
+        assertEquals(false, entity.questionSaved)
+    }
+
+    @Test
+    fun tamperedDerivedValuesAreRejectedOnRead() {
+        val entity = HistoryRecordCodec.toEntity(
+            id = "fixture-session",
+            result = result,
+            questionText = null,
+            saveQuestionText = false,
+        ).copy(primaryHexagramId = 1)
+
+        assertThrows(IllegalArgumentException::class.java) {
+            HistoryRecordCodec.toDomain(entity)
+        }
+    }
+}

app/src/test/java/net/opcapp/flash/domain/casting/CastEngineTest.kt

@@ -1,4 +1,4 @@
-package brainwave.domain.casting
+package net.opcapp.flash.domain.casting
 
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertFalse

app/src/test/java/net/opcapp/flash/feature/question/QuestionValidationTest.kt

@@ -0,0 +1,29 @@
+package net.opcapp.flash.feature.question
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class QuestionValidationTest {
+    @Test
+    fun blankQuestionIsRejected() {
+        assertFalse(QuestionValidation.isValid("  "))
+    }
+
+    @Test
+    fun oneToTwoHundredCharactersAreAccepted() {
+        assertTrue(QuestionValidation.isValid("我该先验证哪个假设？"))
+        assertTrue(QuestionValidation.isValid("问".repeat(200)))
+    }
+
+    @Test
+    fun moreThanTwoHundredCharactersAreRejected() {
+        assertFalse(QuestionValidation.isValid("问".repeat(201)))
+    }
+
+    @Test
+    fun supplementaryUnicodeCodePointCountsAsOneCharacter() {
+        assertEquals(1, QuestionValidation.characterCount("𠀀"))
+    }
+}

build.gradle.kts

@@ -2,6 +2,10 @@ import org.gradle.api.tasks.Exec
 
 plugins {
     base
+    alias(libs.plugins.android.application) apply false
+    alias(libs.plugins.kotlin.android) apply false
+    alias(libs.plugins.kotlin.kapt) apply false
+    alias(libs.plugins.hilt) apply false
 }
 
 fun registerNodeVerificationTask(
@@ -57,11 +61,19 @@ val verifyDependencyLicenseManifest = registerNodeVerificationTask(
     script = "scripts/verify-dependency-licenses.mjs",
 )
 
+val verifyLocalDataBoundary = registerNodeVerificationTask(
+    name = "verifyLocalDataBoundary",
+    description = "Locks down offline permissions and excludes local records from backup and transfer.",
+    script = "scripts/verify-local-data-boundary.mjs",
+)
+
 tasks.register("verifyLocal") {
     group = LifecycleBasePlugin.VERIFICATION_GROUP
     description = "Runs every environment-independent local quality gate."
     dependsOn(
-        ":app:test",
+        ":app:lintDebug",
+        ":app:testDebugUnitTest",
+        ":app:assembleDebug",
         ":app:verifyDependencyLicenses",
         verifyDocs,
         scanSecrets,
@@ -70,6 +82,7 @@ tasks.register("verifyLocal") {
         verifyContentContract,
         spotlessCheck,
         verifyDependencyLicenseManifest,
+        verifyLocalDataBoundary,
     )
 }
 

config/dependency-licenses.json

@@ -1,7 +1,7 @@
 {
   "schemaVersion": 1,
-  "reviewedAt": "2026-08-04",
-  "scopeNote": "Current JVM runtime/test graph and direct build entry points; Android dependencies are not configured yet.",
+  "reviewedAt": "2026-08-19",
+  "scopeNote": "Android debug runtime, debug unit-test runtime, and debug instrumentation-test runtime graphs, plus direct build entry points. Release notices still require a release-graph review.",
   "components": [
     {
       "id": "gradle-wrapper",
@@ -11,6 +11,14 @@
       "license": "Apache-2.0",
       "source": "https://github.com/gradle/gradle/blob/v8.2.0/LICENSE"
     },
+    {
+      "id": "android-gradle-plugin",
+      "coordinates": null,
+      "version": "8.2.0",
+      "scope": "build",
+      "license": "Apache-2.0",
+      "source": "https://android.googlesource.com/platform/tools/base/+/studio-2022.2.1-patch4/LICENSE"
+    },
     {
       "id": "kotlin-gradle-plugin",
       "coordinates": null,
@@ -19,6 +27,54 @@
       "license": "Apache-2.0",
       "source": "https://github.com/JetBrains/kotlin/blob/v1.9.20/license/LICENSE.txt"
     },
+    {
+      "id": "hilt-gradle-plugin",
+      "coordinates": null,
+      "version": "2.48.1",
+      "scope": "build",
+      "license": "Apache-2.0",
+      "source": "https://github.com/google/dagger/blob/dagger-2.48.1/LICENSE.txt"
+    },
+    {
+      "id": "compose-bom",
+      "coordinates": "androidx.compose:compose-bom:2023.10.01",
+      "version": "2023.10.01",
+      "scope": "runtime-constraints",
+      "license": "Apache-2.0",
+      "source": "https://android.googlesource.com/platform/frameworks/support/+/androidx-main/LICENSE.txt"
+    },
+    {
+      "id": "navigation-compose",
+      "coordinates": "androidx.navigation:navigation-compose:2.7.5",
+      "version": "2.7.5",
+      "scope": "runtime",
+      "license": "Apache-2.0",
+      "source": "https://android.googlesource.com/platform/frameworks/support/+/androidx-main/LICENSE.txt"
+    },
+    {
+      "id": "room-runtime",
+      "coordinates": "androidx.room:room-runtime:2.6.1",
+      "version": "2.6.1",
+      "scope": "runtime",
+      "license": "Apache-2.0",
+      "source": "https://android.googlesource.com/platform/frameworks/support/+/androidx-main/LICENSE.txt"
+    },
+    {
+      "id": "datastore-preferences",
+      "coordinates": "androidx.datastore:datastore-preferences:1.0.0",
+      "version": "1.0.0",
+      "scope": "runtime",
+      "license": "Apache-2.0",
+      "source": "https://android.googlesource.com/platform/frameworks/support/+/androidx-main/LICENSE.txt"
+    },
+    {
+      "id": "hilt-android",
+      "coordinates": "com.google.dagger:hilt-android:2.48.1",
+      "version": "2.48.1",
+      "scope": "runtime",
+      "license": "Apache-2.0",
+      "source": "https://github.com/google/dagger/blob/dagger-2.48.1/LICENSE.txt"
+    },
     {
       "id": "kotlin-stdlib",
       "coordinates": "org.jetbrains.kotlin:kotlin-stdlib:1.9.20",
@@ -29,11 +85,35 @@
     },
     {
       "id": "jetbrains-annotations",
-      "coordinates": "org.jetbrains:annotations:13.0",
-      "version": "13.0",
+      "coordinates": "org.jetbrains:annotations:23.0.0",
+      "version": "23.0.0",
       "scope": "runtime-transitive",
       "license": "Apache-2.0",
-      "source": "https://repo1.maven.org/maven2/org/jetbrains/annotations/13.0/annotations-13.0.pom"
+      "source": "https://repo1.maven.org/maven2/org/jetbrains/annotations/23.0.0/annotations-23.0.0.pom"
+    },
+    {
+      "id": "jsr305",
+      "coordinates": "com.google.code.findbugs:jsr305:3.0.2",
+      "version": "3.0.2",
+      "scope": "runtime-transitive",
+      "license": "BSD-3-Clause",
+      "source": "https://repo1.maven.org/maven2/com/google/code/findbugs/jsr305/3.0.2/jsr305-3.0.2.pom"
+    },
+    {
+      "id": "guava-listenablefuture",
+      "coordinates": "com.google.guava:listenablefuture:1.0",
+      "version": "1.0",
+      "scope": "runtime-transitive",
+      "license": "Apache-2.0",
+      "source": "https://repo1.maven.org/maven2/com/google/guava/listenablefuture/1.0/listenablefuture-1.0.pom"
+    },
+    {
+      "id": "javax-inject",
+      "coordinates": "javax.inject:javax.inject:1",
+      "version": "1",
+      "scope": "runtime-transitive",
+      "license": "Apache-2.0",
+      "source": "https://repo1.maven.org/maven2/javax/inject/javax.inject/1/javax.inject-1.pom"
     },
     {
       "id": "junit4",
@@ -50,6 +130,68 @@
       "scope": "test-transitive",
       "license": "BSD-3-Clause",
       "source": "https://github.com/hamcrest/JavaHamcrest/blob/hamcrest-java-1.3/LICENSE.txt"
+    },
+    {
+      "id": "hamcrest-library",
+      "coordinates": "org.hamcrest:hamcrest-library:1.3",
+      "version": "1.3",
+      "scope": "androidTest-transitive",
+      "license": "BSD-3-Clause",
+      "source": "https://github.com/hamcrest/JavaHamcrest/blob/hamcrest-java-1.3/LICENSE.txt"
+    },
+    {
+      "id": "hamcrest-integration",
+      "coordinates": "org.hamcrest:hamcrest-integration:1.3",
+      "version": "1.3",
+      "scope": "androidTest-transitive",
+      "license": "BSD-3-Clause",
+      "source": "https://github.com/hamcrest/JavaHamcrest/blob/hamcrest-java-1.3/LICENSE.txt"
+    },
+    {
+      "id": "gson",
+      "coordinates": "com.google.code.gson:gson:2.9.0",
+      "version": "2.9.0",
+      "scope": "androidTest-transitive",
+      "license": "Apache-2.0",
+      "source": "https://github.com/google/gson/blob/gson-parent-2.9.0/LICENSE"
+    },
+    {
+      "id": "javawriter",
+      "coordinates": "com.squareup:javawriter:2.1.1",
+      "version": "2.1.1",
+      "scope": "androidTest-transitive",
+      "license": "Apache-2.0",
+      "source": "https://github.com/square/javawriter/blob/javawriter-2.1.1/LICENSE.txt"
+    }
+  ],
+  "groupPolicies": [
+    {
+      "id": "androidx-runtime-policy",
+      "groupPrefix": "androidx",
+      "scope": "runtime-transitive",
+      "license": "Apache-2.0",
+      "source": "https://android.googlesource.com/platform/frameworks/support/+/androidx-main/LICENSE.txt"
+    },
+    {
+      "id": "dagger-runtime-policy",
+      "groupPrefix": "com.google.dagger",
+      "scope": "runtime-transitive",
+      "license": "Apache-2.0",
+      "source": "https://github.com/google/dagger/blob/dagger-2.48.1/LICENSE.txt"
+    },
+    {
+      "id": "kotlin-runtime-policy",
+      "groupPrefix": "org.jetbrains.kotlin",
+      "scope": "runtime-transitive",
+      "license": "Apache-2.0",
+      "source": "https://github.com/JetBrains/kotlin/blob/v1.9.20/license/LICENSE.txt"
+    },
+    {
+      "id": "kotlinx-runtime-policy",
+      "groupPrefix": "org.jetbrains.kotlinx",
+      "scope": "runtime-transitive",
+      "license": "Apache-2.0",
+      "source": "https://github.com/Kotlin/kotlinx.coroutines/blob/1.7.1/LICENSE.txt"
     }
   ]
 }

content/plain/lingji-plain.mjs

@@ -0,0 +1,67 @@
+/** 灵机自撰白话草稿。按文王序 1–64；每项为 [卦辞, 初, 二, 三, 四, 五, 上]。 */
+export const lingjiPlain = [
+  ["开始即通达，利于守持正道。", "龙还潜藏着，先不要施展。", "龙出现在田野，利于去见有识之人。", "君子整日健进，夜里仍警惕；虽有危难，可以无灾。", "或跳进深渊，可以无灾。", "龙飞在天上，利于去见有识之人。", "龙飞得过高，会有悔恨。"],
+  ["开始即通达，利于像母马那样守持正道。君子有所前往，先会迷路，随后才得到依靠。利于西南得到同类，东北失去同类。安于守正，吉。", "踩到霜，坚冰就要来了。", "正直方正而广大，不必演习，没有不利。", "蕴含文采，可以守正。或跟从王事，不求自己成功，却能有结果。", "扎紧口袋，无灾也无称誉。", "黄色下裳，大为吉祥。", "龙在郊野争斗，血流成青黄色。"],
+  ["开始即通达，利于守正。不要急着前往，利于立诸侯。", "徘徊不进，利于安居守正，利于立诸侯。", "困顿难行，乘马盘旋。不是强盗，是来求婚。女子守正不嫁，十年才许嫁。", "追鹿却没有虞人向导，只是陷入林中。君子察觉危险，不如放弃；再往前会有憾恨。", "乘马盘旋，去求婚，前往吉，没有不利。", "屯积膏泽。小事守正吉，大事守正凶。", "乘马盘旋，血泪涟涟。"],
+  ["亨通。我不是要去求童蒙，是童蒙来求我。初次卜问则告知；再三乱问，就不告知。利于守正。", "启发蒙昧，利于用刑罚纠正人，用桎梏约束；若一再用刑，就有憾恨。", "包容蒙昧，吉。接纳妇人，吉。孩子能自立，家庭就不再受困。", "不要娶这个女子，她见了财礼就失了自身。无利可图。", "困于蒙昧，憾恨。", "童蒙，吉。", "打击蒙昧。不利于做强盗，利于抵御强盗。"],
+  ["有所等待，有诚信。光辉亨通，守正吉。利于涉大河。", "在郊野等待，利于用恒常的方法，无灾。", "在沙滩等待，小有议论，最终吉。", "在泥中等待，招来贼寇。", "在血中等待，从洞穴里出来。", "在酒食中等待，守正吉。", "进入洞穴，有不请自来的三位客人；尊敬他们，最终吉。"],
+  ["有诚信，在窒塞中警惕，中正则吉，最终凶。利于见大人，不利于涉大河。", "不永久纠缠事务，小有议论，最终吉。", "败于讼事，回家逃避。邑人三百户，无灾。", "食用旧德，守正有危，最终吉。或跟从王事，没有成功。", "不能胜诉，仍复归于常理，改变态度，安静守正则吉。", "讼事，元吉。", "或赐给大带，一天之内被剥夺三次。"],
+  ["贞正。大人吉，无灾。兵众，正而不邪才可用。", "出兵要有纪律；否则，凶。", "在队伍中，无灾，王三次赐命。", "师或载尸而还，凶。", "师左次而退，无灾。", "田里有禽，利于执言，无灾。长子帅师，弟子载尸，贞凶。", "大君有命，开国承家。小人不可重用。"],
+  ["吉。原筮，元永贞，无灾。不安宁的人前来，后夫凶。", "有诚信，比之无灾。有诚信充满瓦缶，终来有别的吉。", "比之从内，贞吉。", "比之匪人。", "在外相比，贞吉。", "显比。王用三驱，失前禽。邑人不诫，吉。", "比之无首，凶。"],
+  ["亨通。密云不雨，自我西郊。", "复归于自己的道路，何其咎？吉。", "牵复，吉。", "舆说辐。夫妻反目。", "有孚，血去惕出，无灾。", "有孚挛如，富以其邻。", "既雨既处，尚德载。妇贞厉。月几望，君子征凶。"],
+  ["踩踏老虎尾巴，不咬人，亨通。", "素履往，无灾。", "履道坦坦，幽人贞吉。", "眇能视，跛能履，履虎尾，咥人，凶。武人为于大君。", "履虎尾，愬愬，终吉。", "夬履，贞厉。", "视履考祥，其旋元吉。"],
+  ["小往大来，吉，亨通。", "拔茅连根，以其类，征吉。", "包荒，用冯河，不遐遗。朋亡，得尚于中行。", "无平不陂，无往不复。艰贞无灾。勿恤其孚，于食有福。", "翩翩，不富以其邻，不戒以孚。", "帝乙归妹，以祉元吉。", "城复于隍，勿用师。自邑告命，贞吝。"],
+  ["否之匪人，不利于君子守正。大的往，小的来。", "拔茅连根，以其类，守正吉，亨通。", "包容奉承。小人吉，大人否塞。亨通。", "包藏羞辱。", "有天命，无灾。同类依附而得福。", "休止否塞，大人吉。心中念着将亡将亡，才能系于苞桑。", "倾覆否塞。先否塞，后喜悦。"],
+  ["同人于野，亨通。利于涉大河，利于君子守正。", "同人于门，无灾。", "同人于宗，吝。", "伏戎于莽，升其高陵，三年不兴。", "乘其墉，弗克攻，吉。", "同人，先号咷而后笑。大师克相遇。", "同人于郊，无悔。"],
+  ["元亨。", "无交害，匪咎，艰则无灾。", "大车以载，有攸往，无灾。", "公用亨于天子。小人弗克。", "匪其彭，无灾。", "厥孚交如，威如，吉。", "自天佑之，吉无不利。"],
+  ["亨通。君子有终。", "谦谦君子，用涉大川，吉。", "鸣谦，贞吉。", "劳谦，君子有终，吉。", "无不利，撝谦。", "不富以其邻，利用侵伐，无不利。", "鸣谦，利用行师，征邑国。"],
+  ["利于建侯行师。", "鸣豫，凶。", "介于石，不终日，贞吉。", "盱豫，悔。迟则有悔。", "由豫，大有得。勿疑，朋盍簪。", "贞疾，恒不死。", "冥豫，成有渝，无灾。"],
+  ["元亨，利贞，无灾。", "官有渝，贞吉。出门交有功。", "系小子，失丈夫。", "系丈夫，失小子。随有求得，利居贞。", "随有获，贞凶。有孚在道，以明，何咎。", "孚于嘉，吉。", "拘系之，乃从维之。王用亨于西山。"],
+  ["元亨，利涉大川。先甲三日，后甲三日。", "干父之蛊，有子，考无咎。厉，终吉。", "干母之蛊，不可贞。", "干父之蛊，小有悔，无大咎。", "裕父之蛊，往见吝。", "干父之蛊，用誉。", "不事王侯，高尚其事。"],
+  ["元亨，利贞。至于八月有凶。", "咸临，贞吉。", "咸临，吉，无不利。", "甘临，无攸利。既忧之，无灾。", "至临，无灾。", "知临，大君之宜，吉。", "敦临，吉，无灾。"],
+  ["盥而不荐，有孚颙若。", "童观，小人无咎，君子吝。", "窥观，利女贞。", "观我生，进退。", "观国之光，利用宾于王。", "观我生，君子无咎。", "观其生，君子无咎。"],
+  ["亨通。利用狱。", "屦校灭趾，无灾。", "噬肤灭鼻，无灾。", "噬腊肉，遇毒。小吝，无灾。", "噬干胏，得金矢。利艰贞，吉。", "噬干肉，得黄金。贞厉，无灾。", "何校灭耳，凶。"],
+  ["亨通。小利有攸往。", "贲其趾，舍车而徒。", "贲其须。", "贲如濡如，永贞吉。", "贲如皤如，白马翰如。匪寇婚媾。", "贲于丘园，束帛戋戋。吝，终吉。", "白贲，无灾。"],
+  ["不利于有所前往。", "剥床以足，蔑贞，凶。", "剥床以辨，蔑贞，凶。", "剥之，无灾。", "剥床以肤，凶。", "贯鱼，以宫人宠，无不利。", "硕果不食。君子得舆，小人剥庐。"],
+  ["亨通。出入没有疾病，朋友来也无灾。一来一回按那条路走，七天会回复。利于有所前往。", "回复得还不远，没有大的悔恨，大为吉祥。", "美好地回复，吉。", "频繁回复，有危难，无灾。", "走在行列中间，独自回复。", "敦厚地回复，没有悔恨。", "迷路却不回复，凶，有灾祸。用此出兵，终有大败，连累国君，凶；到十年还不能出征。"],
+  ["元亨，利贞。其匪正有眚，不利有攸往。", "无妄，往吉。", "不耕获，不菑畲，则利有攸往。", "无妄之灾。或系之牛，行人之得，邑人之灾。", "可贞，无灾。", "无妄之疾，勿药有喜。", "无妄，行有眚，无攸利。"],
+  ["利贞。不家食，吉。利涉大川。", "有厉，利已。", "舆说輹。", "良马逐，利艰贞。日闲舆卫，利有攸往。", "童牛之牿，元吉。", "豮豕之牙，吉。", "何天之衢，亨。"],
+  ["贞吉。观颐，自求口实。", "舍尔灵龟，观我朵颐，凶。", "颠颐，拂经，于丘颐，征凶。", "拂颐，贞凶。十年勿用，无攸利。", "颠颐，吉。虎视眈眈，其欲逐逐，无灾。", "拂经，居贞吉，不可涉大川。", "由颐，厉吉，利涉大川。"],
+  ["栋桡。利有攸往，亨。", "藉用白茅，无灾。", "枯杨生稊，老夫得其女妻，无不利。", "栋桡，凶。", "栋隆，吉。有它吝。", "枯杨生华，老妇得其士夫，无咎无誉。", "过涉灭顶，凶，无灾。"],
+  ["有孚，维心亨，行有尚。", "习坎，入于坎窞，凶。", "坎有险，求小得。", "来之坎坎，险且枕，入于坎窞，勿用。", "樽酒簋贰，用缶，纳约自牖，终无灾。", "坎不盈，祗既平，无灾。", "系用徽纆，置于丛棘，三岁不得，凶。"],
+  ["利贞，亨。畜牝牛，吉。", "履错然，敬之，无灾。", "黄离，元吉。", "日昃之离，不鼓缶而歌，则大耋之嗟，凶。", "突如其来如，焚如，死如，弃如。", "出涕沱若，戚嗟若，吉。", "王用出征，有嘉折首，获匪其丑，无灾。"],
+  ["亨通。利贞。取女吉。", "咸其拇。", "咸其腓，凶。居吉。", "咸其股，执其随，往吝。", "贞吉，悔亡。憧憧往来，朋从尔思。", "咸其脢，无悔。", "咸其辅颊舌。"],
+  ["亨通。无灾。利于守正。利于有所前往。", "深求恒久，守正则凶，无所利。", "悔恨消失。", "不能恒久其德，或许会承受羞辱，守正有憾。", "田里没有禽兽。", "恒久其德，守正。妇人吉，男子凶。", "振动不安于恒，凶。"],
+  ["亨通。小利于守正。", "遁走只剩尾巴，有危，不要有所前往。", "用黄牛皮捆住，没有人能解脱。", "被牵绊着退避，有疾病和危难。畜养臣妾，吉。", "喜好退避，君子吉，小人否塞。", "嘉美地退避，守正吉。", "充裕地退避，没有不利。"],
+  ["利于守正。", "壮在脚趾，出征凶，有诚信。", "贞吉。", "小人用壮，君子用罔，贞厉。公羊触藩，缠住了角。", "贞吉，悔恨消失。藩篱没被破坏，壮在大车的辐上。", "在田里丧失羊，无悔。", "公羊触藩，不能退不能进，无攸利。艰难则吉。"],
+  ["康侯用锡马蕃庶，白天三次接见。", "晋如摧如，贞吉。罔孚，裕无灾。", "晋如愁如，贞吉。受兹介福，于其王母。", "众允，悔亡。", "晋如鼫鼠，贞厉。", "悔亡，失得勿恤。往吉，无不利。", "晋其角，维用伐邑，厉吉，无灾，贞吝。"],
+  ["利于艰难中守正。", "明夷于飞，垂其翼。君子于行，三日不食。有攸往，主人有言。", "明夷，夷于左股，用拯马壮，吉。", "明夷于南狩，得其大首，不可疾贞。", "入于左腹，获明夷之心，于出门庭。", "箕子之明夷，利贞。", "不明晦。初登于天，后入于地。"],
+  ["利于女子守正。", "闲有家，悔亡。", "无攸遂，在中馈，贞吉。", "家人嗃嗃，悔厉吉；妇子嘻嘻，终吝。", "富家，大吉。", "王假有家，勿恤，吉。", "有孚威如，终吉。"],
+  ["小事吉。", "悔亡。丧马勿逐，自复。见恶人，无灾。", "遇主于巷，无灾。", "见舆曳，其牛掣，其人天且劓。无初有终。", "睽孤，遇元夫，交孚，厉无灾。", "悔亡。厥宗噬肤，往何咎。", "睽孤，见豕负涂，载鬼一车。先张之弧，后说之弧。匪寇婚媾。往遇雨则吉。"],
+  ["利西南，不利东北。利见大人。贞吉。", "往蹇，来誉。", "王臣蹇蹇，匪躬之故。", "往蹇，来反。", "往蹇，来连。", "大蹇，朋来。", "往蹇，来硕，吉。利见大人。"],
+  ["利西南。无所往，其来复吉。有攸往，夙吉。", "无灾。", "田获三狐，得黄矢，贞吉。", "负且乘，致寇至，贞吝。", "解而拇，朋至斯孚。", "君子维有解，吉。有孚于小人。", "公用射隼于高墉之上，获之，无不利。"],
+  ["有孚，元吉，无灾，可贞，利有攸往。曷之用？二簋可用享。", "已事遄往，无灾。酌损之。", "利贞。征凶。弗损，益之。", "三人行则损一人，一人行则得其友。", "损其疾，使遄有喜，无灾。", "或益之十朋之龟，弗克违，元吉。", "弗损，益之，无灾。贞吉。利有攸往，得臣无家。"],
+  ["利有攸往。利涉大川。", "利用为大作，元吉，无灾。", "或益之十朋之龟，弗克违。永贞吉。王用享于帝，吉。", "益之用凶事，无灾。有孚中行，告公用圭。", "中行，告公从，利用为依迁国。", "有孚惠心，勿问元吉。有孚惠我德。", "莫益之，或击之，立心勿恒，凶。"],
+  ["扬于王庭。孚号有厉。告自邑，不利即戎，利有攸往。", "壮于前趾，往不胜为咎。", "惕号，莫夜有戎，勿恤。", "壮于頄，有凶。君子夬夬，独行遇雨，若濡有愠，无灾。", "臀无肤，其行次且。牵羊悔亡，闻言不信。", "苋陆夬夬，中行无灾。", "无号，终有凶。"],
+  ["女壮，勿用取女。", "系于金柅，贞吉。有攸往，见凶。羸豕孚蹢躅。", "包有鱼，无灾，不利宾。", "臀无肤，其行次且，厉，无大咎。", "包无鱼，起凶。", "以杞包瓜，含章，有陨自天。", "姤其角，吝，无灾。"],
+  ["亨通。王假有庙。利见大人，亨，利贞。用大牲吉。利有攸往。", "有孚不终，乃乱乃萃。若号，一握为笑，勿恤，往无灾。", "引吉，无灾。孚乃利用禴。", "萃如嗟如，无攸利。往无灾，小吝。", "大吉，无灾。", "萃有位，无灾。匪孚，元永贞，悔亡。", "赍咨涕洟，无灾。"],
+  ["元亨。用见大人，勿恤。南征吉。", "允升，大吉。", "孚乃利用禴，无灾。", "升虚邑。", "王用亨于岐山，吉，无灾。", "贞吉，升阶。", "冥升，利于不息之贞。"],
+  ["亨通。贞，大人吉，无灾。有言不信。", "臀困于株木，入于幽谷，三岁不觌。", "困于酒食，朱绂方来，利用享祀。征凶，无灾。", "困于石，据于蒺藜。入于其宫，不见其妻，凶。", "来徐徐，困于金车，吝，有终。", "劓刖，困于赤绂。乃徐有说，利用祭祀。", "困于葛藟，于臲卼。曰动悔有悔，征吉。"],
+  ["改邑不改井，无丧无得。往来井井。汔至，亦未繘井，羸其瓶，凶。", "井泥不食，旧井无禽。", "井谷射鲋，瓮敝漏。", "井渫不食，为我心恻。可用汲，王明，并受其福。", "井甃，无灾。", "井冽，寒泉食。", "井收勿幕，有孚元吉。"],
+  ["己日乃孚。元亨，利贞，悔亡。", "巩用黄牛之革。", "己日乃革之，征吉，无灾。", "征凶，贞厉。革言三就，有孚。", "悔亡。有孚改命，吉。", "大人虎变，未占有孚。", "君子豹变，小人革面。征凶，居贞吉。"],
+  ["元吉，亨通。", "鼎颠趾，利出否。得妾以其子，无灾。", "鼎有实。我仇有疾，不我能即，吉。", "鼎耳革，其行塞，雉膏不食。方雨亏悔，终吉。", "鼎折足，覆公餗，其形渥，凶。", "鼎黄耳金铉，利贞。", "鼎玉铉，大吉，无不利。"],
+  ["亨通。震来虩虩，笑言哑哑。震惊百里，不丧匕鬯。", "震来虩虩，后笑言哑哑，吉。", "震来厉，亿丧贝。跻于九陵，勿逐，七日得。", "震苏苏，震行无眚。", "震遂泥。", "震往来厉，亿无丧，有事。", "震索索，视矍矍，征凶。震不于其躬，于其邻，无灾。婚媾有言。"],
+  ["艮其背，不获其身；行其庭，不见其人，无灾。", "艮其趾，无灾，利永贞。", "艮其腓，不拯其随，其心不快。", "艮其限，列其夤，厉薰心。", "艮其身，无灾。", "艮其辅，言有序，悔亡。", "敦艮，吉。"],
+  ["女归吉。利贞。", "鸿渐于干，小子厉，有言，无灾。", "鸿渐于磐，饮食衎衎，吉。", "鸿渐于陆，夫征不复，妇孕不育，凶。利御寇。", "鸿渐于木，或得其桷，无灾。", "鸿渐于陵，妇三岁不孕，终莫之胜，吉。", "鸿渐于陆，其羽可用为仪，吉。"],
+  ["征凶，无攸利。", "归妹以娣，跛能履，征吉。", "眇能视，利幽人之贞。", "归妹以须，反归以娣。", "归妹愆期，迟归有时。", "帝乙归妹，其君之袂不如其娣之袂良。月几望，吉。", "女承筐无实，士刲羊无血，无攸利。"],
+  ["亨通。王假之。勿忧，宜日中。", "遇其配主，虽旬无灾，往有尚。", "丰其蔀，日中见斗。往得疑疾，有孚发若，吉。", "丰其沛，日中见沫。折其右肱，无灾。", "丰其蔀，日中见斗。遇其夷主，吉。", "来章，有庆誉，吉。", "丰其屋，蔀其家，窥其户，阒其无人，三岁不觌，凶。"],
+  ["小亨。旅贞吉。", "旅琐琐，斯其所取灾。", "旅即次，怀其资，得童仆贞。", "旅焚其次，丧其童仆，贞厉。", "旅于处，得其资斧，我心不快。", "射雉，一矢亡，终以誉命。", "鸟焚其巢，旅人先笑后号咷。丧牛于易，凶。"],
+  ["小亨。利有攸往。利见大人。", "进退，利武人之贞。", "巽在床下，用史巫纷若，吉，无灾。", "频巽，吝。", "悔亡，田获三品。", "贞吉，悔亡，无不利。无初有终。先庚三日，后庚三日，吉。", "巽在床下，丧其资斧，贞凶。"],
+  ["亨通。利贞。", "和兑，吉。", "孚兑，吉，悔亡。", "来兑，凶。", "商兑未宁，介疾有喜。", "孚于剥，有厉。", "引兑。"],
+  ["亨通。王假有庙。利涉大川，利贞。", "用拯马壮，吉。", "涣奔其机，悔亡。", "涣其躬，无悔。", "涣其群，元吉。涣有丘，匪夷所思。", "涣汗其大号，涣王居，无灾。", "涣其血，去逖出，无灾。"],
+  ["亨通。苦节不可贞。", "不出户庭，无灾。", "不出门庭，凶。", "不节若，则嗟若，无灾。", "安节，亨。", "甘节，吉。往有尚。", "苦节，贞凶，悔亡。"],
+  ["豚鱼吉。利涉大川，利贞。", "虞吉，有它不燕。", "鸣鹤在阴，其子和之。我有好爵，吾与尔靡之。", "得敌，或鼓或罢，或泣或歌。", "月几望，马匹亡，无灾。", "有孚挛如，无灾。", "翰音登于天，贞凶。"],
+  ["亨通。利贞。可小事，不可大事。飞鸟遗之音，不宜上，宜下，大吉。", "飞鸟以凶。", "过其祖，遇其妣。不及其君，遇其臣，无灾。", "弗过防之，从或戕之，凶。", "无灾。弗过遇之。往厉必戒，勿用永贞。", "密云不雨，自我西郊。公弋取彼在穴。", "弗遇过之，飞鸟离之，凶。是谓灾眚。"],
+  ["亨通。小利贞。初吉终乱。", "曳其轮，濡其尾，无灾。", "妇丧其茀，勿逐，七日得。", "高宗伐鬼方，三年克之，小人勿用。", "繻有衣袽，终日戒。", "东邻杀牛，不如西邻之禴祭，实受其福。", "濡其首，厉。"],
+  ["亨通。小狐汔济，濡其尾，无攸利。", "濡其尾，吝。", "曳其轮，贞吉。", "未济，征凶，利涉大川。", "贞吉，悔亡。震用伐鬼方，三年有赏于大国。", "贞吉，无悔。君子之光，有孚，吉。", "有孚于饮酒，无灾。濡其首，有孚失是。"],
+];

docs/README.md

@@ -1,14 +1,14 @@
 # Brainwave 项目文档
 
 > 文档状态：方案基线
-> 最后核验：2026-08-04
-> 当前阶段：P-1 v0.3 待视觉复核；P1 纯 Kotlin 领域核心已完成；P0 仓库门禁与 P2 内容契约已部分完成；可发布 Android 壳仍等待正式身份与 `minSdk` 决策
+> 最后核验：2026-08-19
+> 当前阶段：正式产品名“灵机”；P0/P1 已完成；P3 离线主流程（方法说明、起念、手录、卦名/动爻结果）已可走通；P4 仅完成会话级本机保存与设置，问卦簿与本地解释未开始；P2 已接入维基文库《易经》原文与项目自撰白话草稿，待内容负责人审校；P-1 v0.3 待视觉复核；P5 未开始
 
 本目录是 Brainwave 的项目知识事实源。产品决策、领域算法、架构边界、验收标准和已知失败模式必须写入仓库；聊天记录、口头约定和临时提示不构成项目规范。
 
 ## 项目一句话
 
-Brainwave 是一个以《易经》三枚铜币法为文化背景的 Android 个人反思工具：用户亲手投掷并录入六次结果，应用在本地确定本卦、之卦和动爻；用户主动点击「解」后，本地内容或 AI 才把既有结果翻译成现代语言，并收束到一项低风险、可撤销的现实行动。
+灵机（仓库代号 Brainwave）是一个以《易经》三枚铜币法为文化背景的 Android 个人反思工具：用户亲手投掷并录入六次结果，应用在本地确定本卦、之卦和动爻；用户主动点击「解」后，本地内容或 AI 才把既有结果翻译成现代语言，并收束到一项低风险、可撤销的现实行动。
 
 ## 文档地图
 
@@ -22,6 +22,7 @@ Brainwave 是一个以《易经》三枚铜币法为文化背景的 Android 个
 | [移动端交互原型](prototype.md) | 评审流程、视觉或开始 Compose 页面前 | 可点击原型、截图入口、确认清单和 Android 映射 |
 | [系统架构](architecture.md) | 新增包、依赖、数据源或网络能力时 | 分层、依赖方向、运行时数据流 |
 | [数据与内容](data-content.md) | 修改卦库、历史记录或内容来源时 | 数据契约、授权、隐私和迁移规则 |
+| [内容审校](content-review.md) | 审校卦辞来源或准备发布时 | 来源、异文和签核状态 |
 | [AI 解释与安全](ai-safety.md) | 修改提示词、模型调用或解释结果时 | AI 调用门、输入输出契约和安全边界 |
 | [质量门禁](quality-gates.md) | 实现、评审、发布前 | 自动化验证、需求追踪和完成定义 |
 | [依赖与许可证](dependency-licenses.md) | 新增/升级依赖或准备分发时 | 当前解析依赖、SPDX 与权威许可来源 |
@@ -69,6 +70,7 @@ Brainwave 是一个以《易经》三枚铜币法为文化背景的 Android 个
 已确认：
 
 - 目标平台为原生 Android。
+- 正式产品名为“灵机”，namespace/application ID 为 `net.opcapp.flash`，`minSdk=26`。
 - 使用 Kotlin、Jetpack Compose 和单 Activity 架构。
 - 起卦完全在本地完成，AI 不得参与或更改起卦结果。
 - 用户真实投币并录入；MVP 不提供随机起卦按钮。
@@ -89,4 +91,4 @@ Brainwave 是一个以《易经》三枚铜币法为文化背景的 Android 个
 - 测试命令、构建方式或发布门禁改变；
 - 出现可能再次发生的缺陷。
 
-文档链接、需求编号和验证命令将随工程骨架一起接入 CI 检查。当前尚无 Gradle 工程，不能声称任何构建或测试已经通过。
+文档链接、需求编号和验证命令由 `verifyLocal` 机械检查。授权真机存在时另跑设备仪器测试；未运行的门禁不得写成已经通过。

docs/architecture.md

@@ -39,11 +39,11 @@ Android 官方建议新应用采用清晰的 UI/数据分层、单向数据流
 工程初始化后建议采用：
 
 ```text
-app/src/main/java/<package>/
+app/src/main/java/net/opcapp/flash/
 ├── app/
-│   ├── BrainwaveApplication.kt
+│   ├── LingjiApplication.kt
 │   ├── MainActivity.kt
-│   └── BrainwaveNavHost.kt
+│   └── LingjiApp.kt
 ├── core/
 │   ├── model/                 # 跨层不可变领域模型
 │   ├── designsystem/          # 主题、字体、间距、卦象 Canvas
@@ -69,6 +69,8 @@ app/src/main/java/<package>/
 
 测试按相同包结构镜像放入 `src/test` 和 `src/androidTest`。
 
+当前已落地的包：`app/`、`core/model`、`core/designsystem`、`domain/casting`、`data/content`（assets 解析器与测试 fake）、`data/history`、`data/settings`、`feature/onboarding`、`feature/home`、`feature/question`、`feature/casting`、`feature/result`、`feature/settings`、`feature/content`。尚未创建 `feature/history`、`feature/explanation`、`domain/explanation` 和 `data/ai`。首页不为问卦簿或「解」生成空占位。
+
 ## 4. 依赖方向
 
 允许：
@@ -180,7 +182,7 @@ App → HTTPS backend → model provider
 - 禁止直接引入完整“算命 SDK”或无法审计的卦象计算库。
 - Compose 依赖使用 BOM 对齐版本。
 - `compileSdk`/`targetSdk` 使用实现时最新稳定且满足商店要求的版本，不在方案文档硬编码会迅速过期的数值。
-- `minSdk` 默认提案为 26，最终值见[决策记录](decisions.md#未决问题)。
+- `minSdk=26` 已由 [ADR-014](decisions.md#adr-014正式-android-身份与最低版本) 确认；提高最低版本必须以依赖要求或覆盖率数据另立决策。
 
 ## 11. 多模块化触发条件
 

docs/content-review.md

@@ -0,0 +1,34 @@
+# 内容审校记录
+
+> 状态：P2 数据包已生成，待内容负责人确认可再分发
+> 内容版本：`zh-Hans-2026.1`
+
+## 已接受来源
+
+| 来源 ID | 文本 | 许可 | 说明 |
+|---|---|---|---|
+| `wikisource-zhouyi-jing-zh-Hans` | 卦辞、爻辞、乾用九、坤用六 | 公版（Wikimedia PD-old） | 维基文库《周易》仅《易经》；不含彖、象、文言等十翼。导入脚本：`scripts/import-zhouyi-wikisource.mjs` |
+| `lingji-plain-zh-Hans-2026.1` | 本地白话 | 项目自撰草稿 | `content/plain/lingji-plain.mjs`；审校完成前不得当作已授权现代译本 |
+
+未采用南怀瑾、傅佩荣或其他仍受版权保护的现代译注。
+
+## 工程入口
+
+- 原始导入：`content/raw/zhouyi-wikisource-jing.json`
+- 发布包：`content/packages/hexagram-content.json`
+- 构建：`node scripts/build-hexagram-package.mjs`
+- 再导入需本机 HTTP 代理（默认 `http://127.0.0.1:1080`）访问 `zh.wikisource.org`
+
+## 已知异文
+
+维基文库复卦初九作「不复远，无袛悔」，与常见通行本「不远复，无祇悔」不同。本包按维基文库底本收录，不在导入时改字。审校时可决定是否改从通行本并提升 `contentVersion`。
+
+## 审校清单
+
+- [ ] 64 卦卦辞、384 爻与通行《易经》对读，记录有意保留的异文
+- [ ] 确认不含十翼
+- [ ] 白话无占断口吻、无未授权现代译注抄袭
+- [ ] 乾用九、坤用六原文无误
+- [ ] 内容负责人签署可再分发
+
+签署前，P2 不得标记完成，商店发布不得进行。

docs/data-content.md

@@ -1,6 +1,6 @@
 # 数据、内容与隐私契约
 
-> 状态：结构已定义，内容来源与授权仍为发布阻塞项
+> 状态：`zh-Hans-2026.1` 已接入应用；白话为草稿，发布仍待审校
 > 适用范围：卦库 assets、Room、DataStore、导入脚本和内容审核
 
 ## 1. 数据分类
@@ -58,7 +58,7 @@
 
 示例中的省略号不是可发布内容。禁止由 AI 在构建时临时补齐缺失卦辞或爻辞。
 
-机器契约位于 `content/schema/hexagram-content.schema.json`。`specialUsageTexts` 显式声明当前内容版本是否提供乾“用九”和坤“用六”；声明为 `false` 时对应条目的 `specialUsageText` 必须为 `null`，不能用空字符串暗示内容存在。Android parser 尚未建立前，`scripts/verify-content-contract.mjs` 已提供独立构建期校验、稳定 SHA-256 摘要和不含可发布卦辞的自动化夹具；`HexagramContentRepository` 接口与测试 fake 已建立，缺少 ID 或内容版本不匹配时抛出数据完整性错误，不回退到相邻条目。
+机器契约位于 `content/schema/hexagram-content.schema.json`。`specialUsageTexts` 显式声明当前内容版本是否提供乾“用九”和坤“用六”；声明为 `false` 时对应条目的 `specialUsageText` 必须为 `null`，不能用空字符串暗示内容存在。`scripts/verify-content-contract.mjs` 校验夹具与 `content/packages/hexagram-content.json`；Kotlin `HexagramContentParser` 用同一套规则加载 assets。`HexagramContentRepository` 在缺少 ID 或内容版本不匹配时抛出数据完整性错误，不回退到相邻条目。来源与审校状态见 [内容审校](content-review.md)。
 
 ## 3. 内容完整性门禁
 
@@ -88,6 +88,8 @@
 
 ## 5. Room 数据模型提案
 
+当前实现只有 `CastingSessionEntity` / `casting_sessions`（schema version 1）。`ExplanationEntity` 与 `ActionNoteEntity` 仍是提案，不得在 UI 中假装已经保存解读或行动。
+
 历史记录不是起卦事实源，但应保存可复核的快照：
 
 ```text

docs/decisions.md

@@ -131,16 +131,47 @@
 - 后果：`spotlessCheck` 当前是仓库内的无依赖格式兼容入口，不表示已引入 Spotless 插件。Android 壳建立后必须把 lint/debug build 加入 `verifyLocal`；将来若采用维护良好的专用插件，应保留命令兼容或同步更新 CI 与文档。
 - 复审触发：Android 工具链启用、现有脚本无法表达新边界，或专用工具能以可接受成本提供明显更强的检查。
 
+## ADR-014：正式 Android 身份与最低版本
+
+- 状态：`Accepted`
+- 日期：2026-08-07
+- 关联：解决 TBD-001 中的产品名、TBD-002、TBD-003；2026-08-07 用户确认
+- 决定：正式产品名为“灵机”；用户提供的组织域名 `flash.opcapp.net` 按 Android 反向域名规则映射为 namespace/application ID `net.opcapp.flash`；`minSdk=26`。仓库根名 `brainwave` 继续只作内部代码代号，不进入 Android 发布身份。
+- 原因：稳定的正式身份是创建可安装应用、生成类路径、配置清单和建立设备测试的前置条件；API 26 与已接受架构及当前依赖兼容。
+- 备选：使用临时 application ID 会形成迁移、数据目录与签名身份风险；继续等待会阻塞 P0。`flash.opcapp.net` 不能直接作为 Android application ID，因为发布标识采用反向域名。
+- 后果：主代码迁移到 `net.opcapp.flash`；Android 壳使用“灵机”和 `minSdk=26`。应用图标、商店文案和签名仍未由本决策确认。当前 `compileSdk/targetSdk=34` 是已安装工具链基线，不代表永久商店目标；发布前须按当时商店要求复核升级。
+- 复审触发：组织域名所有权变化、发布账号要求更换 ID，或依赖/覆盖率数据要求提高最低系统版本。application ID 一旦发布不得轻率更换。
+
+## ADR-015：自有白话 + 维基文库公版《易经》原文
+
+- 状态：`Accepted`
+- 日期：2026-08-19
+- 关联：TBD-005、FR-R-005、P2
+- 决定：安装包内的经典原文取自维基文库《周易》的《易经》部分（卦辞、爻辞，以及乾用九、坤用六），不含十翼；现代白话由本项目自撰，标为草稿，待内容负责人审校后才视为可再分发。不把南怀瑾、傅佩荣等现代译注入 APK。
+- 原因：需要可核验、可再分发的公版原文，同时避免把仍受版权保护的现代译文误当成古籍公版。
+- 备选：等待商业授权会继续阻塞离线阅读；使用来源不明的网络译文无法通过内容门禁。
+- 后果：原文事实源为 `content/raw/zhouyi-wikisource-jing.json`，经 `scripts/import-zhouyi-wikisource.mjs` 导入并由 Wikimedia `zh-hans` 转换；白话事实源为 `content/plain/lingji-plain.mjs`；发布包为 `content/packages/hexagram-content.json`，构建时拷入 assets。应用内必须区分“原文”与“本地白话”，并提供内容来源页。P2 在审校签核前不得标为完成。
+- 复审条件：维基文库页面结构变化、发现与通行本有影响阅读的异文、或内容负责人改用另一公版底本。
+
+## ADR-016：乾用九、坤用六在内容具备时展示
+
+- 状态：`Accepted`
+- 日期：2026-08-19
+- 关联：TBD-006、P2/P3
+- 决定：内容包声明并收录乾“用九”、坤“用六”。结果页仅在本卦为乾且六爻皆老阳，或本卦为坤且六爻皆老阴时展示对应特殊文本。
+- 原因：用九/用六是《易经》文本的一部分，不是另造的占断；只有全动时才按传统用法出示，避免静卦或单爻动时误读。
+- 备选：一律隐藏会丢掉已具备的原文；凡见乾坤都展示会把特殊用法当成普通爻辞。
+- 后果：`specialUsageTexts.qian/kun` 必须为 true，且仅乾、坤可有 `specialUsageText`。之卦为乾坤但不满足全九/全六时不展示用九/用六。
+- 复审条件：产品决定对之卦或非全动情形也提示该文本。
+
 ## 未决问题
 
 | ID | 问题 | 推荐默认 | 阻塞阶段 |
 |---|---|---|---|
-| TBD-001 | 正式产品名与应用图标 | Brainwave 仅作代码代号 | P0 商店配置 |
-| TBD-002 | application ID | 使用组织所有的反向域名 | P0 |
-| TBD-003 | minSdk | 26；创建工程时复核覆盖率和依赖要求 | P0 |
+| TBD-001 | 应用图标与商店素材 | 产品名已由 ADR-014 确认为“灵机”；图标不使用未确认成稿 | P6 商店配置 |
 | TBD-004 | 问题是否允许留空 | 允许选择“不写具体内容”，但需显式操作 | P3 |
-| TBD-005 | 经典原文、现代白话的版本与授权 | 自有白话 + 可核验公版原文 | P2，发布阻塞 |
-| TBD-006 | 乾用九、坤用六是否纳入 MVP | 内容具备时展示 | P2/P3 |
+| TBD-005 | 经典原文、现代白话的版本与授权 | 已由 ADR-015 接受；内容负责人审校仍阻塞发布 | P2，发布阻塞 |
+| TBD-006 | 乾用九、坤用六是否纳入 MVP | 已由 ADR-016 接受：全九/全六时展示 | P2/P3 |
 | TBD-009 | AI 模型供应商与自有后端 | 供应商无关接口；先交付本地版 | P5 |
 | TBD-010 | 服务端问题/回复保留期 | 最小化且明确披露，优先不持久化正文 | P5，发布阻塞 |
 | TBD-011 | 高风险本地资源表覆盖地区 | 首发市场确认后维护，不让模型编号码 | P5 |

docs/dependency-licenses.md

@@ -1,17 +1,44 @@
 # 依赖与许可证清单
 
-> 状态：当前 JVM harness 已核验；Android application 依赖尚未配置
-> 适用范围：实际解析的 JVM runtime/test graph，以及直接使用的构建入口
+> 状态：Android debug runtime、debug unit-test runtime 与 debug instrumentation-test runtime 依赖图已建立自动覆盖门禁
+> 适用范围：实际解析的 Android 调试运行时、单元测试/仪器测试运行时，以及直接使用的构建入口
 
-本清单不是未来 Android APK 的最终 third-party notices。每次新增或升级依赖时，必须同步 `config/dependency-licenses.json` 并运行 `.\gradlew.bat verifyLocal --offline`；Android 依赖启用后，还要生成 release runtime 的完整报告并复核是否需要在应用或分发包中附带许可证文本。
+本清单不是上架包的最终 third-party notices。每次新增或升级依赖时，必须同步 `config/dependency-licenses.json` 并运行 `.\gradlew.bat verifyLocal`；发布前仍须对 release runtime 生成完整报告，复核许可证文本与随包义务。
+
+## 直接条目
 
 | ID | 版本 | 当前范围 | SPDX | 权威许可来源 |
 |---|---:|---|---|---|
-| `gradle-wrapper` | 8.2 | 构建入口 | Apache-2.0 | [Gradle 8.2 license](https://github.com/gradle/gradle/blob/v8.2.0/LICENSE) |
-| `kotlin-gradle-plugin` | 1.9.20 | 构建插件 | Apache-2.0 | [Kotlin 1.9.20 license](https://github.com/JetBrains/kotlin/blob/v1.9.20/license/LICENSE.txt) |
-| `kotlin-stdlib` | 1.9.20 | JVM runtime | Apache-2.0 | [Kotlin 1.9.20 license](https://github.com/JetBrains/kotlin/blob/v1.9.20/license/LICENSE.txt) |
-| `jetbrains-annotations` | 13.0 | JVM runtime transitive | Apache-2.0 | [Maven artifact metadata](https://repo1.maven.org/maven2/org/jetbrains/annotations/13.0/annotations-13.0.pom) |
-| `junit4` | 4.13.2 | test | EPL-1.0 | [JUnit 4.13.2 license](https://github.com/junit-team/junit4/blob/r4.13.2/LICENSE-junit.txt) |
-| `hamcrest-core` | 1.3 | test transitive | BSD-3-Clause | [Hamcrest 1.3 license](https://github.com/hamcrest/JavaHamcrest/blob/hamcrest-java-1.3/LICENSE.txt) |
+| `gradle-wrapper` | 8.2 | 构建入口 | Apache-2.0 | [Gradle license](https://github.com/gradle/gradle/blob/v8.2.0/LICENSE) |
+| `android-gradle-plugin` | 8.2.0 | 构建插件 | Apache-2.0 | [Android tools license](https://android.googlesource.com/platform/tools/base/+/studio-2022.2.1-patch4/LICENSE) |
+| `kotlin-gradle-plugin` | 1.9.20 | 构建插件 | Apache-2.0 | [Kotlin license](https://github.com/JetBrains/kotlin/blob/v1.9.20/license/LICENSE.txt) |
+| `hilt-gradle-plugin` | 2.48.1 | 构建插件 | Apache-2.0 | [Dagger/Hilt license](https://github.com/google/dagger/blob/dagger-2.48.1/LICENSE.txt) |
+| `compose-bom` | 2023.10.01 | 运行时版本约束 | Apache-2.0 | [AndroidX license](https://android.googlesource.com/platform/frameworks/support/+/androidx-main/LICENSE.txt) |
+| `navigation-compose` | 2.7.5 | 运行时 | Apache-2.0 | [AndroidX license](https://android.googlesource.com/platform/frameworks/support/+/androidx-main/LICENSE.txt) |
+| `room-runtime` | 2.6.1 | 运行时 | Apache-2.0 | [AndroidX license](https://android.googlesource.com/platform/frameworks/support/+/androidx-main/LICENSE.txt) |
+| `datastore-preferences` | 1.0.0 | 运行时 | Apache-2.0 | [AndroidX license](https://android.googlesource.com/platform/frameworks/support/+/androidx-main/LICENSE.txt) |
+| `hilt-android` | 2.48.1 | 运行时 | Apache-2.0 | [Dagger/Hilt license](https://github.com/google/dagger/blob/dagger-2.48.1/LICENSE.txt) |
+| `kotlin-stdlib` | 1.9.20 | 运行时 | Apache-2.0 | [Kotlin license](https://github.com/JetBrains/kotlin/blob/v1.9.20/license/LICENSE.txt) |
+| `jetbrains-annotations` | 23.0.0 | 运行时传递依赖 | Apache-2.0 | [Maven artifact metadata](https://repo1.maven.org/maven2/org/jetbrains/annotations/23.0.0/annotations-23.0.0.pom) |
+| `jsr305` | 3.0.2 | 运行时传递依赖 | BSD-3-Clause | [Maven artifact metadata](https://repo1.maven.org/maven2/com/google/code/findbugs/jsr305/3.0.2/jsr305-3.0.2.pom) |
+| `guava-listenablefuture` | 1.0 | 运行时传递依赖 | Apache-2.0 | [Maven artifact metadata](https://repo1.maven.org/maven2/com/google/guava/listenablefuture/1.0/listenablefuture-1.0.pom) |
+| `javax-inject` | 1 | 运行时传递依赖 | Apache-2.0 | [Maven artifact metadata](https://repo1.maven.org/maven2/javax/inject/javax.inject/1/javax.inject-1.pom) |
+| `junit4` | 4.13.2 | 单元测试 | EPL-1.0 | [JUnit license](https://github.com/junit-team/junit4/blob/r4.13.2/LICENSE-junit.txt) |
+| `hamcrest-core` | 1.3 | 单元测试传递依赖 | BSD-3-Clause | [Hamcrest license](https://github.com/hamcrest/JavaHamcrest/blob/hamcrest-java-1.3/LICENSE.txt) |
+| `hamcrest-library` | 1.3 | 仪器测试传递依赖 | BSD-3-Clause | [Hamcrest license](https://github.com/hamcrest/JavaHamcrest/blob/hamcrest-java-1.3/LICENSE.txt) |
+| `hamcrest-integration` | 1.3 | 仪器测试传递依赖 | BSD-3-Clause | [Hamcrest license](https://github.com/hamcrest/JavaHamcrest/blob/hamcrest-java-1.3/LICENSE.txt) |
+| `gson` | 2.9.0 | 仪器测试传递依赖 | Apache-2.0 | [Gson license](https://github.com/google/gson/blob/gson-parent-2.9.0/LICENSE) |
+| `javawriter` | 2.1.1 | 仪器测试传递依赖 | Apache-2.0 | [JavaWriter license](https://github.com/square/javawriter/blob/javawriter-2.1.1/LICENSE.txt) |
 
-当前没有第三方 Android runtime 库、字体、纹理、插画、音效或可发布《易经》内容进入工程；这句话只描述本提交时的依赖图，不构成未来授权。
+## 传递依赖组策略
+
+下列策略只允许当前解析图中的 Maven group 命中对应许可证；未知 group 会让 Gradle 门禁失败，工程自身产物不参与第三方检查。
+
+| ID | Maven group 前缀 | 当前范围 | SPDX | 权威许可来源 |
+|---|---|---|---|---|
+| `androidx-runtime-policy` | `androidx` | 运行时传递依赖 | Apache-2.0 | [AndroidX license](https://android.googlesource.com/platform/frameworks/support/+/androidx-main/LICENSE.txt) |
+| `dagger-runtime-policy` | `com.google.dagger` | 运行时传递依赖 | Apache-2.0 | [Dagger/Hilt license](https://github.com/google/dagger/blob/dagger-2.48.1/LICENSE.txt) |
+| `kotlin-runtime-policy` | `org.jetbrains.kotlin` | 运行时传递依赖 | Apache-2.0 | [Kotlin license](https://github.com/JetBrains/kotlin/blob/v1.9.20/license/LICENSE.txt) |
+| `kotlinx-runtime-policy` | `org.jetbrains.kotlinx` | 运行时传递依赖 | Apache-2.0 | [Kotlinx Coroutines license](https://github.com/Kotlin/kotlinx.coroutines/blob/1.7.1/LICENSE.txt) |
+
+当前没有第三方字体、纹理、插画或音效进入工程。应用使用 Android 系统字体、代码绘制的卦象，以及 `content/packages/hexagram-content.json` 中的维基文库公版《易经》与项目自撰白话草稿；这句话只描述本提交时的资源图，不构成内容负责人已签核。

docs/domain-rules.md

@@ -5,7 +5,7 @@
 
 本文件定义本项目唯一允许的计算规则。UI 文案、AI 输出和数据源都不能覆盖这些规则。
 
-实现状态：`coin-v1` 纯 Kotlin 核心位于 `app/src/main/java/brainwave/domain/casting/`；`.\gradlew.bat :app:test --offline` 覆盖 8 种币面、4,096 种六爻、64 模式、已知夹具和 DTO 往返。记录时间与内容版本在确定性计算完成后附加。
+实现状态：`coin-v1` 纯 Kotlin 核心位于 `app/src/main/java/net/opcapp/flash/domain/casting/`；`.\gradlew.bat :app:testDebugUnitTest` 覆盖 8 种币面、4,096 种六爻、64 模式、已知夹具和 DTO 往返。记录时间与内容版本在确定性计算完成后附加。
 
 ## 1. 术语和类型
 

docs/environment.md

@@ -1,7 +1,7 @@
 # 本地开发环境基线
 
 > 状态：已从当前主机实测
-> 最后核验：2026-08-04
+> 最后核验：2026-08-19
 > 适用范围：`D:\OPC\brainwave` 的 Android 开发、构建和设备验证
 
 本文件记录项目当前可用的本地工具链，不是期望环境清单。后续实现必须先使用这里已经确认的能力；需要升级或安装新工具时，应说明原因并在完成后更新本文件。
@@ -39,7 +39,7 @@
 | Node.js / npm | `22.22.1` / `11.12.1` |
 | Google Chrome | `150.0.7871.188`，`C:\Program Files\Google\Chrome\Application\chrome.exe` |
 
-首次环境审计时仓库没有 Gradle Wrapper、`build.gradle*`、`settings.gradle*` 或根 `AGENTS.md`。当前这些仓库级入口已经建立；`app` 暂时是纯 Kotlin/JVM 领域 harness，不是可安装 Android application。
+首次环境审计时仓库没有 Gradle Wrapper、`build.gradle*`、`settings.gradle*` 或根 `AGENTS.md`。当前这些入口和可安装的 Android application 已建立；正式应用名为“灵机”，application ID 为 `net.opcapp.flash`。
 
 Windows 路径可能较长；如果后续依赖缓存或生成代码触发路径长度错误，应优先缩短包/生成目录或评估仓库级长路径配置，并把实际决定写入[决策记录](decisions.md)。
 
@@ -111,23 +111,21 @@ Android Studio 不是当前环境的可用前提。项目必须先支持 PowerSh
 .\gradlew.bat <task>
 ```
 
-不要要求用户安装全局 Gradle。当前缓存已实际证明 Gradle 8.2、Kotlin 1.9.20 与 JUnit 4.13.2 可离线完成领域构建和测试；Compose、Hilt、Room 等 Android 依赖仍未配置或验证，不能据此推断可离线解析。
+不要要求用户安装全局 Gradle。当前缓存已实际证明 Gradle 8.2、AGP 8.2.0、Kotlin 1.9.20、Compose、Hilt、Room、DataStore、Navigation 与 JUnit 可完成 Android debug 构建、lint、单元测试和测试 APK 编译；首次解析已经联网完成，后续离线可用性仍以实际命令为准。
 
 ## 7. 已连接 Android 真机
 
-检测时存在 1 台已授权的物理设备。为避免持久化设备标识，本文件不记录序列号。
+2026-08-07 本轮曾检测到 1 台已授权的物理设备。为避免持久化设备标识，本文件不记录序列号。
 
 | 项目 | 实测值 |
 |---|---|
-| 厂商/型号 | OnePlus `PKG110` |
-| Android | 16 |
-| API Level | 36 |
-| ABI | `arm64-v8a` |
-| 物理分辨率 | `1264 × 2780` |
-| 当前覆盖分辨率 | `1080 × 2376` |
-| 物理/覆盖密度 | `560 / 480 dpi` |
+| 厂商/型号 | Samsung `SM-G9700` |
+| Android | 12 |
+| API Level | 31 |
+| 物理分辨率 | `1080 × 2280` |
+| 物理密度 | `480 dpi` |
 
-当前设备可用于 `adb` 安装、手工验收和 `connectedDebugAndroidTest`。测试脚本不得硬编码序列号；设备可能随时断开，纯 JVM 门禁必须独立可运行。
+该设备满足 `minSdk=26`，可用于 `adb` 安装、手工验收和仪器测试。测试脚本不得硬编码序列号；设备可能随时断开，环境独立门禁必须单独可运行。本机 `PATH` 中的 `D:\Portable\adb\adb.exe` 为 ADB 1.0.32，SDK Platform Tools 37.0.0 提供 ADB 1.0.41；两者会争用 5037 端口并互相重启 server。本轮三星设备只在便携 ADB server 下稳定枚举，SDK ADB 重启后设备接口消失，因此真机门禁通过 `run-connected-tests.ps1 -AdbPath` 显式选择单一 ADB。不要同时启动两个 server，也不要把“Windows 能看到 USB 复合设备”误当作 ADB 已连接。
 
 ## 8. 网络与代理状态
 
@@ -146,21 +144,20 @@ Android Studio 不是当前环境的可用前提。项目必须先支持 PowerSh
 2. 使用项目自带 Gradle Wrapper，不依赖全局 `gradle` 或 `kotlinc`。
 3. 首次可构建配置只能依赖已安装的 SDK Platform 34 和 Build Tools 34.0.0；若模板要求更高版本，应先记录差异，再决定调整模板或安装 SDK。
 4. 命令行构建是必须能力，不假设 Android Studio 存在。
-5. 仪器测试优先使用已连接的 API 36、arm64 真机；不假设 Emulator/AVD 存在。
+5. 仪器测试优先使用当前可用的 API 31 三星真机；不假设 Emulator/AVD 或固定设备存在。
 6. 不自动安装系统级工具、SDK 平台或模拟器；确需新增环境能力时，先说明影响。
 7. 发布时的 `targetSdk` 和商店要求是独立发布门禁，不能因为本机只有 Platform 34 就永久锁定；工具链升级后必须更新本文件和相关 ADR。
 8. P-1 原型截图使用现有 Node.js 与 Chrome DevTools 协议生成，不额外安装前端依赖；命令见[移动端交互原型](prototype.md#3-运行方式)。
 
 ## 10. 已知缺口
 
-- 可安装的 Android application 壳尚未创建；正式名称、组织所有的 application ID 与最终 `minSdk` 仍待确认。
 - Android Studio 未安装。
 - Android Emulator、system image 和 AVD 不可用。
 - 本机只确认安装了 Android Platform 34 / Build Tools 34.0.0。
-- Compose、Hilt、Room、DataStore 与 Navigation 的 Maven 依赖尚未完整离线验证。
-- 代理已配置，但外部仓库和 Android CLI 网络连通性尚未验证。
+- `PATH` 中 ADB 1.0.32 与 SDK ADB 1.0.41 会争用 server；当前三星设备的可重复门禁需要显式选择便携 ADB，后续应评估统一驱动和 Platform Tools。
+- 代理已配置；本轮 Maven 依赖下载成功，但不能据此保证未来网络始终可用。
 
-已解除的缺口：Gradle Wrapper、Version Catalog、根 `AGENTS.md`、CI 与可执行的 `verifyLocal` 已建立；`verifyLocal --offline` 已在 JDK 17 上通过。它当前不包含 Android lint、APK 构建或设备测试。
+已解除的缺口：Gradle Wrapper、Version Catalog、根 `AGENTS.md`、CI、正式 Android 身份和 application 壳均已建立。2026-08-19，`verifyLocal` 通过（含 debug 单元测试、`lintDebug` 与 debug APK，已校验 `zh-Hans-2026.1` 内容包）；便携 ADB 下 Samsung API 31 真机 `run-connected-tests.ps1` 得到 `OK (4 tests)`，覆盖方法说明、保存设置、夹具「复 24 → 坤 2、初爻动」本机保存/当次删除（结果页已展示原文/白话），以及 Room 会话读写。未发现应用崩溃日志。飞行模式人工走查、无障碍抽测和内容负责人签核仍未做。
 
 这些缺口分别由[实施计划](implementation-plan.md)的 P0 和[质量门禁](quality-gates.md)处理。环境缺口不是跳过验证的理由；无法运行的门禁必须在交付报告中准确说明。
 

docs/implementation-plan.md

@@ -1,6 +1,6 @@
 # 分阶段实施计划
 
-> 状态：P-1 v0.3 待视觉复核；P0 仓库门禁已建立但 Android 壳受 TBD-001～003 阻塞；P1 已完成并通过穷举测试；P2 内容契约已建立但授权内容未开始
+> 状态：P0/P1 已完成；P3 离线主流程已落地但未达到 UX 全表验收；P4 会话保存已落地，问卦簿/解读未开始；P2 已接入公版《易经》与自撰白话草稿，待审校签核；P-1 v0.3 待视觉复核
 > 计划原则：先用原型确认高返工成本体验，再锁定确定性领域核心，随后接内容和 UI，最后接网络 AI
 
 ## 1. 依赖图
@@ -47,11 +47,11 @@ P1 与 P2 可并行，但 P3 不能在领域与内容契约未稳定时复制原
 任务：
 
 - [x] 读取并遵守[本地开发环境](environment.md)：JDK 17、SDK 34、命令行优先、Gradle Wrapper、真机验证。
-- [ ] 基于 Google `android/architecture-templates` 的 `base` 分支初始化 Android 壳；模板定制需要 TBD-002 的正式 application ID，不能用临时发布身份替代。
-- [ ] 确认正式应用名称、package/application ID、minSdk（TBD-001～003）。
-- [ ] 配置 Compose、Material 3、Hilt、Room、DataStore 和 Navigation；Version Catalog 已先用于 JVM harness。
-- [ ] 配置 Gradle Wrapper、格式化、lint、单元测试和 CI：Wrapper、无依赖格式门禁、JVM 单测与 CI 已完成；Android lint 要等 application 插件启用。
-- [ ] 建立 [系统架构](architecture.md)中的包结构和空 feature 边界：`domain/casting` 已落地，其余随 Android 壳建立。
+- [x] 参照 Google `android/architecture-templates` 的 `base` 分支建立单模块 Android 壳和分层边界。
+- [x] 确认正式应用名称“灵机”、namespace/application ID `net.opcapp.flash`、`minSdk=26`（ADR-014）。
+- [x] 配置 Compose、Material 3、Hilt、Room、DataStore 和 Navigation，并由 Version Catalog 固定兼容版本。
+- [x] 配置 Gradle Wrapper、格式、Android lint、单元测试、debug APK、依赖许可证门禁和 CI 同入口验证。
+- [x] 建立 [系统架构](architecture.md)中的 `app`、`core/designsystem`、`domain`、`data`、`feature/home` 与 `feature/result` 边界；未实施 feature 不创建空包。
 - [x] 将根 `AGENTS.md` 设计为短地图，指向本目录和验证命令。
 - [x] 增加 `verifyLocal` 聚合任务、文档链接、领域边界、内容契约与基础 secret scan。
 
@@ -59,9 +59,11 @@ P1 与 P2 可并行，但 P3 不能在领域与内容契约未稳定时复制原
 
 - Windows 上一条命令可执行格式、lint、单测和 debug 构建。
 - CI 使用同一组命令。
-- 空应用可在模拟器启动，导航到占位欢迎页。
+- 开发验证应用可在授权真机启动，并从首页导航到已知领域夹具结果页。
 - 没有生产服务密钥或真实内容。
 
+完成证据（2026-08-08）：`verifyLocal`、13 个 debug 单元测试、`lintDebug`、主/测试 APK 构建均通过；调试 APK 在 Samsung API 31 设备冷启动到 `MainActivity`，`MainActivityTest` 真机执行 1/1 通过，并验证首页进入“复 24 → 坤 2、初爻动”结果页。因本机 ADB 1.0.32/1.0.41 server 冲突，设备门禁使用仓库脚本显式选择可枚举该设备的 ADB，未改写 SDK 工具。
+
 ## 4. P1：领域核心
 
 目标：在纯 Kotlin 中完成并证明三枚铜币算法。
@@ -82,7 +84,7 @@ P1 与 P2 可并行，但 P3 不能在领域与内容契约未稳定时复制原
 - 测试无随机、无网络、无系统时间依赖。
 - `CastEngine` API 经评审后冻结为 `coin-v1`。
 
-当前证据：`.\gradlew.bat :app:test --offline` 中 `CastEngineTest` 执行 10 个测试、0 失败；实现位于 `app/src/main/java/brainwave/domain/casting/`。`brainwave` 是内部代码命名空间，不是 TBD-002 的 application ID。
+当前证据：`.\gradlew.bat :app:testDebugUnitTest` 中 `CastEngineTest` 执行 10 个测试、0 失败；实现位于 `app/src/main/java/net/opcapp/flash/domain/casting/`，且领域边界脚本禁止 Android/Compose/数据库/网络依赖。
 
 ## 5. P2：内容数据管线
 
@@ -90,18 +92,18 @@ P1 与 P2 可并行，但 P3 不能在领域与内容契约未稳定时复制原
 
 任务：
 
-- [ ] 决定原文版本、现代白话来源和授权（TBD-005，发布阻塞）。
-- [ ] 实现 JSON schema、解析器和内容版本：`schemaVersion=1` 的机器 schema 已完成；Android/Kotlin assets 解析器待 Android 壳建立。
-- [ ] 录入/导入 64 卦、卦辞、384 条爻辞及所需特殊文本。
-- [ ] 建立来源清单、许可证清单和内容审核记录；schema 已强制每个来源包含版本、许可证与 URL。
+- [x] 决定原文版本、现代白话来源和授权（TBD-005）：ADR-015 接受“自有白话 + 维基文库公版《易经》原文”；发布仍待审校签核。
+- [x] 实现 JSON schema、解析器和内容版本：`schemaVersion=1` 的机器 schema、Kotlin assets 解析器与 `zh-Hans-2026.1` 包已落地。
+- [x] 录入/导入 64 卦、卦辞、384 条爻辞及乾用九、坤用六；白话为项目自撰草稿。
+- [x] 建立来源清单、许可证清单和内容审核记录：见 [内容审校](content-review.md)；schema 已强制每个来源包含版本、许可证与 URL。
 - [x] 实现构建期完整性校验、文王序号/上下卦/bottom-up 交叉校验、稳定 SHA-256 摘要及 8 个负向夹具。
-- [ ] 实现 `HexagramContentRepository` fake 与 assets 版本：接口、强校验只读模型和测试 fake 已完成，assets 实现待 Android parser。
+- [x] 实现 `HexagramContentRepository` fake 与 assets 版本：加载失败时展示完整性错误，不回退到相邻卦。
 
 退出条件：
 
-- 64 卦/384 爻数据完整、唯一且来源可追踪。
-- 缺失、重复、非法顺序和错误映射测试均能失败。
-- 内容负责人确认可再分发。
+- [x] 64 卦/384 爻数据完整、唯一且来源可追踪。
+- [x] 缺失、重复、非法顺序和错误映射测试均能失败。
+- [ ] 内容负责人确认可再分发。
 
 ## 6. P3：核心用户流程与东方设计系统
 
@@ -109,13 +111,13 @@ P1 与 P2 可并行，但 P3 不能在领域与内容契约未稳定时复制原
 
 任务：
 
-- 实现颜色、字体、间距、形状和动画令牌。
-- 实现卦象 `Canvas`、动爻标记和读屏语义。
-- 实现首次说明、起念、投币和结果页面。
-- 实现 `CastingSessionViewModel` 状态机及 SavedState 恢复。
-- 支持前五轮返回修改、第六轮封印和明确重新起卦。
-- 接入本地内容并区分原文/本地白话。
-- 完成深浅主题、字体缩放、TalkBack、横屏和大屏适配。
+- [x] 实现颜色、字体、间距、形状和动画令牌：当前为 `LingjiTheme` 纸墨朱砂配色与系统衬线/无衬线配对；独立 token 文件、指定字体包和动效仍未做。
+- [x] 实现卦象 `Canvas`、动爻标记和读屏语义：结果页绘制本卦/之卦，动爻同时使用颜色、圆点和文字。
+- [x] 实现首次说明、起念、投币和结果页面：方法说明、问题、六轮手录和结果已接入导航；空问题仍被拒绝，TBD-004 未决。
+- [x] 实现 `CastingViewModel` 状态机及 SavedState 恢复：问题、已确认爻和当前轮次写入 `SavedStateHandle`；第六轮才调用 `CastEngine`。
+- [x] 支持前五轮返回修改、第六轮封印和明确重新起卦。
+- [x] 接入本地内容并区分原文/本地白话：结果页展示本卦卦辞、动爻爻辞和之卦卦辞，并标注原文/白话；乾全九、坤全六时展示用九/用六。白话仍为待审校草稿。
+- [ ] 完成深浅主题、字体缩放、TalkBack、横屏和大屏适配：深浅色随系统；其余未做发布级验收。
 
 退出条件：
 
@@ -124,20 +126,22 @@ P1 与 P2 可并行，但 P3 不能在领域与内容契约未稳定时复制原
 - AI/网络代码尚未存在也不影响流程。
 - [UX 与东方视觉](ux-design.md)检查表通过。
 
+当前证据（2026-08-19）：`verifyLocal` 通过；仪器测试覆盖方法说明、保存设置和夹具「复 24 → 坤 2、初爻动」的本机保存/当次删除。P3 仍未退出，因为「解」、问卦簿入口和 UX 全表未完成。飞行模式未做人工走查。内容包已接入但白话待审校。
+
 ## 7. P4：本地解释与历史
 
 目标：形成不依赖 AI 的完整 MVP。
 
 任务：
 
-- 实现版本化本地解释模板。
-- 实现“可以试的一小步”的非裁决式结构。
-- 实现 Room 历史：第六爻锁定后按策略自动保存快照，问题原文、当次解读和行动记录默认保存到同一会话。
-- 实现 `autoSaveHistory` 总开关及三个默认开启的内容开关；支持总开关关闭后的“保存本次”和全局设置不变的“本次不保存/删除本次记录”。
-- 实现按时间倒序的问卦簿、派生“最近一次”、空态、详情、解释版本、单条删除和清空全部确认。
-- 在首页实现固定本机保存/AI 发送边界说明和设置入口；本地保存设置与 AI 同意版本保持独立。
-- 配置 backup/data-extraction 规则，排除历史 Room 数据库及辅助文件。
-- 完成 migration、策略组合、事务关联、删除、备份排除、隐私和离线测试。
+- [ ] 实现版本化本地解释模板。
+- [ ] 实现“可以试的一小步”的非裁决式结构。
+- [x] 实现 Room 历史会话：第六爻锁定后按 `autoSaveHistory` 写入 `casting_sessions` 快照；问题原文受内容开关控制。解读与行动表尚未建立。
+- [x] 实现 `autoSaveHistory` 总开关及三个默认开启的内容开关；总开关关闭后结果页提供“保存本次”，已保存时可“本次不保存/删除本次记录”。解读/行动开关目前只保留偏好，不写入任何正文。
+- [ ] 实现按时间倒序的问卦簿、空态、详情、解释版本、单条删除和清空全部确认。首页仅展示条数与最近一次派生摘要，不进入列表。
+- [x] 在首页实现固定本机保存/AI 发送边界说明和设置入口；本地保存设置与 AI 同意版本保持独立。
+- [x] 配置 backup/data-extraction 规则，排除历史 Room 数据库及辅助文件；`verifyLocalDataBoundary` 锁定 `allowBackup=false` 且无 INTERNET 权限。
+- [ ] 完成 migration、策略组合、事务关联、删除、备份排除、隐私和离线测试：schema 1 无需迁移；编解码、Room 仪器测试和首页设置仪器测试已有，策略组合与级联删除未覆盖。
 
 退出条件：
 

docs/product-spec.md

@@ -1,7 +1,7 @@
 # 产品规格
 
 > 状态：MVP 方案基线
-> 产品代号：Brainwave（正式名称 TBD）
+> 产品代号：Brainwave（正式名称：灵机）
 > 原始输入：[原始需求.txt](原始需求.txt)
 
 ## 1. 产品定义

docs/prototype.md

@@ -8,7 +8,7 @@
 
 在初始化 Android 工程前，先用可点击原型确认最容易返工的产品决策：信息层级、六次录入方式、结果阅读顺序、AI 同意门和东方文化表达。原型确认后，P3 的 Compose 页面应复用这里的设计令牌和状态契约，而不是重新发明流程。
 
-本轮使用“一问”作为视觉工作名。它不构成正式命名决定；正式名称、应用图标和商店素材仍是 [TBD-001](decisions.md#未决问题)。
+v0.3 截图仍保留当时的视觉工作名“一问”，不得当作当前产品文案。正式产品名已由 [ADR-014](decisions.md#adr-014正式-android-身份与最低版本) 确认为“灵机”；应用图标与商店素材仍见 [TBD-001](decisions.md#未决问题)，P3 固化正式页面前须刷新原型品牌文案。
 
 ## 2. 交付范围
 

docs/quality-gates.md

@@ -1,6 +1,6 @@
 # 质量门禁与验证策略
 
-> 状态：JVM/harness 门禁已启用；Android lint、构建、UI 与设备门禁等待 Android application 壳
+> 状态：Android 本地门禁已启用；设备门禁在授权真机存在时单独执行
 > 原则：完成必须有可重复证据，不能以“代码看起来正确”代替验证
 
 ## 1. 反馈循环
@@ -21,26 +21,27 @@
 
 ```powershell
 .\gradlew.bat spotlessCheck --offline
-.\gradlew.bat :app:test --offline
+.\gradlew.bat :app:testDebugUnitTest --offline
 .\gradlew.bat verifyContentContract --offline
-.\gradlew.bat verifyLocal --offline
+.\gradlew.bat verifyLocal
 ```
 
-`verifyLocal` 当前聚合无依赖格式检查、10 个领域测试、3 个内容 repository 测试、已解析 JVM 依赖许可证、domain 依赖边界、内容契约与负向夹具、文档链接、高置信 secret scan 和原型 JavaScript 语法检查。CI 执行同一个聚合任务。
+`verifyLocal` 聚合无依赖格式检查、领域穷举测试、内容 repository 测试、历史编解码测试、问题校验测试、Android lint、debug APK、已解析 Android 调试/单测/仪器测试依赖许可证、domain 依赖边界、内容契约与负向夹具、文档链接、高置信 secret scan、原型 JavaScript 语法检查，以及本机备份排除/无 INTERNET 权限检查。CI 执行同一个聚合任务。首次解析 Android 依赖时不能强制 `--offline`；缓存完成后可用离线模式复核。
 
-Android application 插件配置后，Windows 环境还必须提供：
+授权真机存在时，Windows 环境还必须执行：
 
 ```powershell
 .\gradlew.bat spotlessCheck
-.\gradlew.bat lintDebug
-.\gradlew.bat testDebugUnitTest
-.\gradlew.bat assembleDebug
 .\gradlew.bat connectedDebugAndroidTest
 ```
 
-若采用不同格式化插件，命令可以调整，但必须在本文件和 CI 同步更新。`connectedDebugAndroidTest` 需要模拟器或设备，应与纯 JVM 快速门禁分开。
+若本机存在两个不兼容的 ADB server，可在只保留一个 server 的前提下使用等价的可重复入口：
 
-到那时必须把 Android lint 和 debug build 加入现有 `verifyLocal`，使代理仍不必猜测验证组合。在完成这一步之前，`verifyLocal` 通过只证明 JVM 与仓库门禁，不代表 APK 已构建或真机测试已通过。
+```powershell
+.\scripts\run-connected-tests.ps1 -AdbPath <能够稳定识别设备的 adb.exe>
+```
+
+该脚本重新构建主/测试 APK、检查授权状态、覆盖安装两者并直接调用同一个 `AndroidJUnitRunner`；失败、零测试或缺少 `OK` 结果都会使脚本失败。若采用不同格式化插件，命令可以调整，但必须在本文件和 CI 同步更新。设备测试继续与环境独立的 `verifyLocal` 分开；`verifyLocal` 通过证明 APK 已构建，但不等于真机测试已经通过。
 
 ## 3. 测试层次
 
@@ -127,7 +128,7 @@ Android application 插件配置后，Windows 环境还必须提供：
 | FR-C-007 | SavedState/重建测试 | 旋转、切后台、进程恢复 |
 | FR-R-001~003 | UI 语义与 screenshot 测试 | TalkBack、色觉与长文阅读 |
 | FR-R-004 | 网络失败测试 | 飞行模式 |
-| FR-R-005 | 内容 schema/授权清单检查 | 内容负责人签核 |
+| FR-R-005 | 内容 schema/授权清单检查 | 自动校验已接入；内容负责人签核仍待完成 |
 | FR-E-001~003 | 网络调用次数与同意状态测试 | 首次同意流程 |
 | FR-E-004~006 | 输出 schema + 安全用例集 | 安全/产品审核 |
 | FR-H-001~008 | 保存策略、Room 事务/版本、删除、备份排除、零网络调用测试 | 首页告知、设置、当次退出与删除体验 |

docs/ux-design.md

@@ -2,6 +2,7 @@
 
 > 状态：MVP 设计基线
 > 适用范围：Android 手机优先，兼顾横屏、平板和系统无障碍设置
+> 当前实现：Compose 已覆盖方法说明、回访首页、起念、六轮手录、卦名/动爻结果、原文/本地白话和保存设置；问卦簿列表与「解」仍未进入应用，不能把本文件尚未实现的页面当成已上线功能
 
 ## 1. 体验定位
 

gradle.properties

@@ -0,0 +1,3 @@
+android.useAndroidX=true
+kotlin.code.style=official
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8

gradle/libs.versions.toml

@@ -1,9 +1,46 @@
 [versions]
+agp = "8.2.0"
 kotlin = "1.9.20"
+composeBom = "2023.10.01"
+composeCompiler = "1.5.5"
+coreKtx = "1.12.0"
+activityCompose = "1.8.1"
+lifecycle = "2.6.2"
+navigation = "2.7.5"
+room = "2.6.1"
+dataStore = "1.0.0"
+hilt = "2.48.1"
 junit = "4.13.2"
+androidxTestExt = "1.1.5"
+androidxTestRunner = "1.5.2"
 
 [libraries]
+androidx-core-ktx = { module = "androidx.core:core-ktx", version.ref = "coreKtx" }
+androidx-activity-compose = { module = "androidx.activity:activity-compose", version.ref = "activityCompose" }
+androidx-lifecycle-runtime-ktx = { module = "androidx.lifecycle:lifecycle-runtime-ktx", version.ref = "lifecycle" }
+androidx-lifecycle-runtime-compose = { module = "androidx.lifecycle:lifecycle-runtime-compose", version.ref = "lifecycle" }
+androidx-lifecycle-viewmodel-compose = { module = "androidx.lifecycle:lifecycle-viewmodel-compose", version.ref = "lifecycle" }
+androidx-compose-bom = { module = "androidx.compose:compose-bom", version.ref = "composeBom" }
+androidx-compose-ui = { module = "androidx.compose.ui:ui" }
+androidx-compose-ui-tooling-preview = { module = "androidx.compose.ui:ui-tooling-preview" }
+androidx-compose-material3 = { module = "androidx.compose.material3:material3" }
+androidx-compose-ui-tooling = { module = "androidx.compose.ui:ui-tooling" }
+androidx-compose-ui-test-junit4 = { module = "androidx.compose.ui:ui-test-junit4" }
+androidx-compose-ui-test-manifest = { module = "androidx.compose.ui:ui-test-manifest" }
+androidx-navigation-compose = { module = "androidx.navigation:navigation-compose", version.ref = "navigation" }
+androidx-room-runtime = { module = "androidx.room:room-runtime", version.ref = "room" }
+androidx-room-ktx = { module = "androidx.room:room-ktx", version.ref = "room" }
+androidx-room-compiler = { module = "androidx.room:room-compiler", version.ref = "room" }
+androidx-room-testing = { module = "androidx.room:room-testing", version.ref = "room" }
+androidx-datastore-preferences = { module = "androidx.datastore:datastore-preferences", version.ref = "dataStore" }
+hilt-android = { module = "com.google.dagger:hilt-android", version.ref = "hilt" }
+hilt-compiler = { module = "com.google.dagger:hilt-compiler", version.ref = "hilt" }
 junit = { module = "junit:junit", version.ref = "junit" }
+androidx-test-ext-junit = { module = "androidx.test.ext:junit", version.ref = "androidxTestExt" }
+androidx-test-runner = { module = "androidx.test:runner", version.ref = "androidxTestRunner" }
 
 [plugins]
-kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
+android-application = { id = "com.android.application", version.ref = "agp" }
+kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
+kotlin-kapt = { id = "org.jetbrains.kotlin.kapt", version.ref = "kotlin" }
+hilt = { id = "com.google.dagger.hilt.android", version.ref = "hilt" }

scripts/build-hexagram-package.mjs

@@ -0,0 +1,85 @@
+import { readFile, writeFile, mkdir } from "node:fs/promises";
+import path from "node:path";
+import { kingWenEntries, validateContentPackage } from "./content-contract.mjs";
+import { repositoryRoot } from "./repository-files.mjs";
+import { lingjiPlain } from "../content/plain/lingji-plain.mjs";
+
+const names = [
+  "乾", "坤", "屯", "蒙", "需", "讼", "师", "比",
+  "小畜", "履", "泰", "否", "同人", "大有", "谦", "豫",
+  "随", "蛊", "临", "观", "噬嗑", "贲", "剥", "复",
+  "无妄", "大畜", "颐", "大过", "坎", "离", "咸", "恒",
+  "遁", "大壮", "晋", "明夷", "家人", "睽", "蹇", "解",
+  "损", "益", "夬", "姤", "萃", "升", "困", "井",
+  "革", "鼎", "震", "艮", "渐", "归妹", "丰", "旅",
+  "巽", "兑", "涣", "节", "中孚", "小过", "既济", "未济",
+];
+
+if (lingjiPlain.length !== 64) {
+  throw new Error(`lingji plain table must contain 64 hexagrams, got ${lingjiPlain.length}`);
+}
+
+const jingPath = path.join(repositoryRoot, "content", "raw", "zhouyi-wikisource-jing.json");
+const jing = JSON.parse(await readFile(jingPath, "utf8"));
+if (!Array.isArray(jing) || jing.length !== 64) {
+  throw new Error("Wikisource jing import must contain 64 hexagrams; run scripts/import-zhouyi-wikisource.mjs");
+}
+
+const jingById = new Map(jing.map((item) => [item.kingWenNumber, item]));
+const entries = kingWenEntries();
+const originalSource = "wikisource-zhouyi-jing-zh-Hans";
+const plainSource = "lingji-plain-zh-Hans-2026.1";
+
+const contentPackage = {
+  schemaVersion: 1,
+  contentVersion: "zh-Hans-2026.1",
+  specialUsageTexts: { qian: true, kun: true },
+  sources: [
+    {
+      id: originalSource,
+      title: "维基文库《周易》易经",
+      edition: "仅卦辞、爻辞与乾用九、坤用六，不含十翼；由 zh.wikisource.org 导入并经 Wikimedia zh-hans 转换",
+      license: "公版（Wikimedia PD-old）",
+      url: "https://zh.wikisource.org/wiki/周易",
+    },
+    {
+      id: plainSource,
+      title: "灵机本地白话",
+      edition: "2026.1 项目自撰草稿，待内容负责人审校后视为可再分发",
+      license: "项目自撰；审校完成前仅用于本机构建，不以现代译注冒充公版",
+      url: "https://creativecommons.org/licenses/by/4.0/deed.zh-Hans",
+    },
+  ],
+  hexagrams: entries.map((entry) => {
+    const original = jingById.get(entry.kingWenNumber);
+    if (!original) {
+      throw new Error(`Missing jing text for King Wen ${entry.kingWenNumber}`);
+    }
+    const plain = lingjiPlain[entry.kingWenNumber - 1];
+    if (!Array.isArray(plain) || plain.length !== 7 || plain.some((text) => !String(text).trim())) {
+      throw new Error(`Plain text for King Wen ${entry.kingWenNumber} must contain 7 non-blank strings`);
+    }
+    return {
+      ...entry,
+      name: names[entry.kingWenNumber - 1],
+      symbol: String.fromCodePoint(0x4DC0 + entry.kingWenNumber - 1),
+      judgmentOriginal: original.judgmentOriginal,
+      judgmentPlain: plain[0],
+      lineTextsBottomUp: original.lineTextsBottomUp,
+      linePlainBottomUp: plain.slice(1),
+      specialUsageText: original.specialUsageText ?? null,
+      sourceRefs: [originalSource, plainSource],
+    };
+  }),
+};
+
+const errors = validateContentPackage(contentPackage);
+if (errors.length > 0) {
+  throw new Error(`Built content package failed validation:\n${errors.join("\n")}`);
+}
+
+const outputDirectory = path.join(repositoryRoot, "content", "packages");
+await mkdir(outputDirectory, { recursive: true });
+const outputPath = path.join(outputDirectory, "hexagram-content.json");
+await writeFile(outputPath, `${JSON.stringify(contentPackage, null, 2)}\n`);
+process.stdout.write(`wrote ${outputPath}\n`);

scripts/import-zhouyi-wikisource.mjs

@@ -0,0 +1,221 @@
+import { execFile } from "node:child_process";
+import { mkdir, readFile, writeFile } from "node:fs/promises";
+import path from "node:path";
+import { promisify } from "node:util";
+import { kingWenEntries } from "./content-contract.mjs";
+import { repositoryRoot } from "./repository-files.mjs";
+
+const execFileAsync = promisify(execFile);
+const proxyUrl = process.env.HTTPS_PROXY || process.env.HTTP_PROXY || "http://127.0.0.1:1080";
+const limit = Number.parseInt(process.env.IMPORT_LIMIT ?? "64", 10);
+const userAgent = "LingjiContentImport/1.0 (local Zhouyi pipeline; public-domain jingwen only)";
+const outputDirectory = path.join(repositoryRoot, "content", "raw");
+const outputPath = path.join(outputDirectory, "zhouyi-wikisource-jing.json");
+
+const titles = [
+  "乾", "坤", "屯", "蒙", "需", "訟", "師", "比",
+  "小畜", "履", "泰", "否", "同人", "大有", "謙", "豫",
+  "隨", "蠱", "臨", "觀", "噬嗑", "賁", "剝", "復",
+  "无妄", "大畜", "頤", "大過", "坎", "離", "咸", "恆",
+  "遯", "大壯", "晉", "明夷", "家人", "睽", "蹇", "解",
+  "損", "益", "夬", "姤", "萃", "升", "困", "井",
+  "革", "鼎", "震", "艮", "漸", "歸妹", "豐", "旅",
+  "巽", "兌", "渙", "節", "中孚", "小過", "既濟", "未濟",
+];
+
+const linePattern = /^(初九|九二|九三|九四|九五|上九|初六|六二|六三|六四|六五|上六|用九|用六)[：:，,](.*)$/u;
+
+function stripMarkup(wikitext) {
+  return wikitext
+    .replace(/-\{([^}|]+)-\}/gu, "$1")
+    .replace(/\{\{[^}]*\}\}/gu, "")
+    .replace(/<[^>]+>/gu, "")
+    .replace(/'{2,}/gu, "")
+    .replace(/\[\[File:[^\]]*\]\]/gu, "")
+    .replace(/\[\[(?:[^\|\]]*\|)?([^\]]+)\]\]/gu, "$1")
+    .replace(/&nbsp;/gu, " ")
+    .replace(/\r/gu, "");
+}
+
+function parseClassicFields(section) {
+  const rawLines = section
+    .split("\n")
+    .map((line) => line.replace(/^[ *#:]+/u, "").trim())
+    .filter(Boolean);
+
+  let judgment = "";
+  const lines = [];
+  let special = null;
+  for (const rawLine of rawLines) {
+    const compact = rawLine.replace(/\s+/gu, "");
+    const hit = linePattern.exec(compact) ?? linePattern.exec(rawLine);
+    if (hit) {
+      const label = hit[1];
+      const text = `${label}：${hit[2].trim()}`;
+      if (label === "用九" || label === "用六") {
+        special = text;
+      } else {
+        lines.push(text);
+      }
+    } else if (lines.length === 0 && special == null) {
+      const fragment = rawLine.replace(/\s+/gu, "");
+      judgment = judgment ? `${judgment}${fragment}` : fragment;
+    }
+  }
+
+  judgment = judgment
+    .replace(/^(?:周易)?[\u4e00-\u9fff]{1,3}[：:]/u, "")
+    .trim();
+  if (!judgment) throw new Error("missing judgment");
+  if (lines.length !== 6) {
+    throw new Error(`expected 6 lines, got ${lines.length}: ${lines.join(" | ")}`);
+  }
+  return { judgmentOriginal: judgment, lineTextsBottomUp: lines, specialUsageText: special };
+}
+
+function extractClassicSection(wikitext) {
+  const normalized = stripMarkup(wikitext).replace(/\u3000/gu, " ");
+  const classicIndex = normalized.search(/易[經经][：:]/u);
+  if (classicIndex < 0) throw new Error("missing 易經 section");
+  const afterClassic = normalized.slice(classicIndex);
+  const stop = afterClassic.search(/\n[ *#]*彖曰[：:]/u);
+  return (stop >= 0 ? afterClassic.slice(0, stop) : afterClassic)
+    .replace(/^易[經经][：:]\s*/u, "")
+    .trim();
+}
+
+function stripHtml(value) {
+  return value
+    .replace(/<[^>]+>/gu, "")
+    .replace(/&quot;/gu, "\"")
+    .replace(/&amp;/gu, "&")
+    .replace(/&lt;/gu, "<")
+    .replace(/&gt;/gu, ">")
+    .replace(/\n+/gu, "\n")
+    .trim();
+}
+
+async function curlJson(args) {
+  const { stdout } = await execFileAsync("curl.exe", [
+    "-sS",
+    "--fail",
+    "--retry",
+    "12",
+    "--retry-delay",
+    "20",
+    "--retry-all-errors",
+    "--max-time",
+    "45",
+    "-x",
+    proxyUrl,
+    "-H",
+    `User-Agent: ${userAgent}`,
+    "-H",
+    "Accept: application/json",
+    ...args,
+  ], { encoding: "utf8", maxBuffer: 8 * 1024 * 1024 });
+  return JSON.parse(stdout);
+}
+
+const titleFallbacks = {
+  恆: ["恒"],
+  遯: ["遁"],
+  晉: ["晋"],
+  大壯: ["大壮"],
+  歸妹: ["归妹"],
+  豐: ["丰"],
+  兌: ["兑"],
+  渙: ["涣"],
+  節: ["节"],
+  既濟: ["既济"],
+  未濟: ["未济"],
+};
+
+async function fetchWikitext(title) {
+  const candidates = [title, ...(titleFallbacks[title] ?? [])];
+  for (const candidate of candidates) {
+    const url = new URL("https://zh.wikisource.org/w/api.php");
+    url.searchParams.set("action", "parse");
+    url.searchParams.set("page", `周易/${candidate}`);
+    url.searchParams.set("prop", "wikitext");
+    url.searchParams.set("format", "json");
+    const payload = await curlJson([url.toString()]);
+    const wikitext = payload?.parse?.wikitext?.["*"];
+    if (typeof wikitext === "string") return wikitext;
+    process.stdout.write(`missing ${candidate}, trying fallback\n`);
+  }
+  throw new Error(`no wikitext for ${title}`);
+}
+
+async function toHansFields(classic) {
+  const pieces = [
+    classic.judgmentOriginal,
+    ...classic.lineTextsBottomUp,
+    ...(classic.specialUsageText == null ? [] : [classic.specialUsageText]),
+  ];
+  const converted = await convertToHans(pieces.join("\n¶\n"));
+  const parts = converted
+    .split("¶")
+    .map((part) => part.replace(/\s+/gu, "").trim())
+    .filter(Boolean);
+  if (parts.length !== pieces.length) {
+    throw new Error(`zh-hans field count ${parts.length} != ${pieces.length}: ${converted}`);
+  }
+  return {
+    judgmentOriginal: parts[0],
+    lineTextsBottomUp: parts.slice(1, 7),
+    specialUsageText: classic.specialUsageText == null ? null : parts[7],
+  };
+}
+async function convertToHans(text) {
+  const payload = await curlJson([
+    "--data-urlencode", "action=parse",
+    "--data-urlencode", `text=${text}`,
+    "--data-urlencode", "prop=text",
+    "--data-urlencode", "variant=zh-hans",
+    "--data-urlencode", "disablelimitreport=1",
+    "--data-urlencode", "wrapoutputclass=",
+    "--data-urlencode", "contentmodel=wikitext",
+    "--data-urlencode", "format=json",
+    "https://zh.wikisource.org/w/api.php",
+  ]);
+  const html = payload?.parse?.text?.["*"];
+  if (typeof html !== "string") throw new Error("zh-hans conversion returned no text");
+  return stripHtml(html);
+}
+
+const entries = kingWenEntries();
+await mkdir(outputDirectory, { recursive: true });
+let imported = [];
+try {
+  imported = JSON.parse(await readFile(outputPath, "utf8"));
+  if (!Array.isArray(imported)) imported = [];
+} catch {
+  imported = [];
+}
+const done = new Set(imported.map((item) => item.kingWenNumber));
+
+for (const [index, title] of titles.entries()) {
+  if (index >= limit) break;
+  const kingWenNumber = index + 1;
+  if (done.has(kingWenNumber)) {
+    process.stdout.write(`skip ${kingWenNumber}/64 ${title}\n`);
+    continue;
+  }
+  const wikitext = await fetchWikitext(title);
+  const traditional = extractClassicSection(wikitext);
+  const classic = await toHansFields(parseClassicFields(traditional));
+  imported.push({
+    kingWenNumber,
+    wikisourceTitle: title,
+    sourcePage: `https://zh.wikisource.org/wiki/周易/${title}`,
+    ...entries[index],
+    ...classic,
+  });
+  imported.sort((left, right) => left.kingWenNumber - right.kingWenNumber);
+  await writeFile(outputPath, `${JSON.stringify(imported, null, 2)}\n`);
+  process.stdout.write(`imported ${kingWenNumber}/64 ${title}\n`);
+  await new Promise((resolve) => setTimeout(resolve, 1200));
+}
+
+process.stdout.write(`wrote ${outputPath} (${imported.length} hexagrams)\n`);

scripts/run-connected-tests.ps1

@@ -0,0 +1,52 @@
+[CmdletBinding()]
+param(
+    [string]$AdbPath = (Join-Path $env:ANDROID_HOME "platform-tools\adb.exe")
+)
+
+Set-StrictMode -Version Latest
+$ErrorActionPreference = "Stop"
+
+$repositoryRoot = Split-Path -Parent $PSScriptRoot
+$gradleWrapper = Join-Path $repositoryRoot "gradlew.bat"
+$mainApk = Join-Path $repositoryRoot "app\build\outputs\apk\debug\app-debug.apk"
+$testApk = Join-Path $repositoryRoot "app\build\outputs\apk\androidTest\debug\app-debug-androidTest.apk"
+$instrumentation = "net.opcapp.flash.test/androidx.test.runner.AndroidJUnitRunner"
+
+if (-not (Test-Path -LiteralPath $AdbPath -PathType Leaf)) {
+    throw "ADB executable not found: $AdbPath"
+}
+
+& $gradleWrapper :app:assembleDebug :app:assembleDebugAndroidTest --no-daemon --console=plain
+if ($LASTEXITCODE -ne 0) {
+    throw "Android app or test APK build failed."
+}
+
+$deviceState = (& $AdbPath get-state 2>$null)
+if ($LASTEXITCODE -ne 0 -or $deviceState.Trim() -ne "device") {
+    throw "No authorized Android device is available through: $AdbPath"
+}
+
+& $AdbPath install -r $mainApk
+if ($LASTEXITCODE -ne 0) {
+    throw "Main APK installation failed."
+}
+
+& $AdbPath install -r $testApk
+if ($LASTEXITCODE -ne 0) {
+    throw "Test APK installation failed."
+}
+
+$instrumentationOutput = & $AdbPath shell am instrument -w -r $instrumentation 2>&1
+$instrumentationExitCode = $LASTEXITCODE
+$instrumentationOutput | Write-Output
+$joinedOutput = $instrumentationOutput -join "`n"
+
+if (
+    $instrumentationExitCode -ne 0 -or
+    $joinedOutput -match "FAILURES!!!" -or
+    $joinedOutput -notmatch "OK \(\d+ tests?\)"
+) {
+    throw "Connected Android instrumentation tests failed."
+}
+
+Write-Output "Connected Android instrumentation tests passed."

scripts/verify-content-contract.mjs

@@ -19,7 +19,9 @@ const kotlinCatalogPath = path.join(
   "src",
   "main",
   "java",
-  "brainwave",
+  "net",
+  "opcapp",
+  "flash",
   "domain",
   "casting",
   "HexagramCatalog.kt",
@@ -102,3 +104,52 @@ for (const [name, mutate, expected] of negativeCases) {
 console.log(
   `Content contract verification passed (64 entries cross-checked with Kotlin, ${negativeCases.length} negative fixtures, digest ${digest.slice(0, 12)}…).`,
 );
+
+const packagePath = path.join(repositoryRoot, "content", "packages", "hexagram-content.json");
+const namesPath = path.join(
+  repositoryRoot,
+  "app",
+  "src",
+  "main",
+  "java",
+  "net",
+  "opcapp",
+  "flash",
+  "core",
+  "model",
+  "HexagramNames.kt",
+);
+const namesSource = await readFile(namesPath, "utf8");
+const namesBlock = namesSource.match(/private val names = listOf\(([\s\S]*?)\)/u);
+if (!namesBlock) {
+  throw new Error("HexagramNames.kt name table could not be parsed");
+}
+const catalogNames = [...namesBlock[1].matchAll(/"([^"]+)"/gu)].map((match) => match[1]);
+if (catalogNames.length !== 64) {
+  throw new Error("HexagramNames.kt must contain 64 names");
+}
+
+const published = JSON.parse(await readFile(packagePath, "utf8"));
+const publishedErrors = validateContentPackage(published);
+if (publishedErrors.length > 0) {
+  throw new Error(`Published content package failed validation:\n${publishedErrors.join("\n")}`);
+}
+published.hexagrams.forEach((hexagram) => {
+  const expectedName = catalogNames[hexagram.kingWenNumber - 1];
+  const expectedSymbol = String.fromCodePoint(0x4DC0 + hexagram.kingWenNumber - 1);
+  if (hexagram.name !== expectedName) {
+    throw new Error(`Published package name for ${hexagram.kingWenNumber} must be ${expectedName}`);
+  }
+  if (hexagram.symbol !== expectedSymbol) {
+    throw new Error(`Published package symbol for ${hexagram.kingWenNumber} must be ${expectedSymbol}`);
+  }
+});
+if (published.contentVersion !== "zh-Hans-2026.1") {
+  throw new Error("Published contentVersion must be zh-Hans-2026.1");
+}
+if (!published.specialUsageTexts.qian || !published.specialUsageTexts.kun) {
+  throw new Error("Published package must include Qian 用九 and Kun 用六");
+}
+console.log(
+  `Published content package ${published.contentVersion} passed (digest ${contentDigest(published).slice(0, 12)}…).`,
+);

scripts/verify-dependency-licenses.mjs

@@ -17,19 +17,42 @@ if (manifest.schemaVersion !== 1) failures.push("manifest schemaVersion must be
 if (!Array.isArray(manifest.components) || manifest.components.length === 0) {
   failures.push("manifest components must not be empty");
 }
+if (!Array.isArray(manifest.groupPolicies) || manifest.groupPolicies.length === 0) {
+  failures.push("manifest groupPolicies must not be empty");
+}
 
 const allowedLicenses = new Set(["Apache-2.0", "BSD-3-Clause", "EPL-1.0"]);
 const ids = new Set();
 const coordinates = new Set();
-for (const [index, component] of (manifest.components ?? []).entries()) {
-  const prefix = `components[${index}]`;
-  for (const field of ["id", "version", "scope", "license", "source"]) {
-    if (typeof component[field] !== "string" || component[field].trim() === "") {
+const validateCommonFields = (entry, prefix) => {
+  for (const field of ["id", "scope", "license", "source"]) {
+    if (typeof entry[field] !== "string" || entry[field].trim() === "") {
       failures.push(`${prefix}.${field} must be non-blank text`);
     }
   }
-  if (ids.has(component.id)) failures.push(`${prefix}.id must be unique`);
-  ids.add(component.id);
+  if (ids.has(entry.id)) failures.push(`${prefix}.id must be unique`);
+  ids.add(entry.id);
+  if (!allowedLicenses.has(entry.license)) failures.push(`${prefix}.license is not reviewed`);
+  try {
+    const url = new URL(entry.source);
+    if (url.protocol !== "https:") throw new Error("not HTTPS");
+  } catch {
+    failures.push(`${prefix}.source must be an absolute HTTPS URL`);
+  }
+  if (!documentation.includes(entry.id) || !documentation.includes(entry.license)) {
+    failures.push(`${prefix} is not represented in docs/dependency-licenses.md`);
+  }
+};
+
+for (const [index, component] of (manifest.components ?? []).entries()) {
+  const prefix = `components[${index}]`;
+  validateCommonFields(component, prefix);
+  if (typeof component.version !== "string" || component.version.trim() === "") {
+    failures.push(`${prefix}.version must be non-blank text`);
+  }
+  if (!documentation.includes(component.version)) {
+    failures.push(`${prefix}.version is not represented in docs/dependency-licenses.md`);
+  }
   if (component.coordinates !== null) {
     if (typeof component.coordinates !== "string" || component.coordinates.split(":").length !== 3) {
       failures.push(`${prefix}.coordinates must be group:name:version or null`);
@@ -38,24 +61,31 @@ for (const [index, component] of (manifest.components ?? []).entries()) {
     }
     coordinates.add(component.coordinates);
   }
-  if (!allowedLicenses.has(component.license)) failures.push(`${prefix}.license is not reviewed`);
-  try {
-    const url = new URL(component.source);
-    if (url.protocol !== "https:") throw new Error("not HTTPS");
-  } catch {
-    failures.push(`${prefix}.source must be an absolute HTTPS URL`);
-  }
-  if (!documentation.includes(component.id) ||
-    !documentation.includes(component.version) ||
-    !documentation.includes(component.license)) {
-    failures.push(`${prefix} is not represented in docs/dependency-licenses.md`);
+}
+
+const groupPrefixes = new Set();
+for (const [index, policy] of (manifest.groupPolicies ?? []).entries()) {
+  const prefix = `groupPolicies[${index}]`;
+  validateCommonFields(policy, prefix);
+  if (typeof policy.groupPrefix !== "string" || !/^[a-z][a-z0-9.]+$/u.test(policy.groupPrefix)) {
+    failures.push(`${prefix}.groupPrefix must be a Maven group prefix`);
+  } else if (groupPrefixes.has(policy.groupPrefix)) {
+    failures.push(`${prefix}.groupPrefix must be unique`);
   }
+  groupPrefixes.add(policy.groupPrefix);
 }
 
 const version = (name) => new RegExp(`^${name}\\s*=\\s*"([^"]+)"`, "mu").exec(catalog)?.[1];
 const expectedVersions = new Map([
   ["gradle-wrapper", /gradle-([\d.]+)-bin\.zip/u.exec(wrapper)?.[1]],
+  ["android-gradle-plugin", version("agp")],
   ["kotlin-gradle-plugin", version("kotlin")],
+  ["hilt-gradle-plugin", version("hilt")],
+  ["compose-bom", version("composeBom")],
+  ["navigation-compose", version("navigation")],
+  ["room-runtime", version("room")],
+  ["datastore-preferences", version("dataStore")],
+  ["hilt-android", version("hilt")],
   ["kotlin-stdlib", version("kotlin")],
   ["junit4", version("junit")],
 ]);
@@ -71,5 +101,8 @@ if (failures.length > 0) {
   for (const failure of failures) console.error(`- ${failure}`);
   process.exitCode = 1;
 } else {
-  console.log(`Dependency-license manifest passed (${manifest.components.length} reviewed components).`);
+  console.log(
+    `Dependency-license manifest passed (${manifest.components.length} components, ` +
+      `${manifest.groupPolicies.length} group policies).`,
+  );
 }

scripts/verify-domain-boundaries.mjs

@@ -6,7 +6,17 @@ import {
   walkFiles,
 } from "./repository-files.mjs";
 
-const domainRoot = path.join(repositoryRoot, "app", "src", "main", "java", "brainwave", "domain");
+const domainRoot = path.join(
+  repositoryRoot,
+  "app",
+  "src",
+  "main",
+  "java",
+  "net",
+  "opcapp",
+  "flash",
+  "domain",
+);
 const forbiddenImports = [
   /^android\./u,
   /^androidx\./u,

scripts/verify-format.mjs

@@ -15,6 +15,7 @@ const checkedExtensions = new Set([
   ".md",
   ".mjs",
   ".properties",
+  ".ps1",
   ".toml",
   ".xml",
   ".yaml",

scripts/verify-local-data-boundary.mjs

@@ -0,0 +1,61 @@
+import { readFile } from "node:fs/promises";
+import path from "node:path";
+import { repositoryRoot } from "./repository-files.mjs";
+
+const manifestPath = path.join(repositoryRoot, "app", "src", "main", "AndroidManifest.xml");
+const backupRulesPath = path.join(
+  repositoryRoot,
+  "app",
+  "src",
+  "main",
+  "res",
+  "xml",
+  "backup_rules.xml",
+);
+const extractionRulesPath = path.join(
+  repositoryRoot,
+  "app",
+  "src",
+  "main",
+  "res",
+  "xml",
+  "data_extraction_rules.xml",
+);
+
+const [manifest, backupRules, extractionRules] = await Promise.all([
+  readFile(manifestPath, "utf8"),
+  readFile(backupRulesPath, "utf8"),
+  readFile(extractionRulesPath, "utf8"),
+]);
+
+const failures = [];
+if (!manifest.includes('android:allowBackup="false"')) {
+  failures.push("Android backup must remain disabled");
+}
+if (!manifest.includes('android:usesCleartextTraffic="false"')) {
+  failures.push("cleartext traffic must remain disabled");
+}
+if (/android\.permission\.INTERNET/u.test(manifest)) {
+  failures.push("the offline application must not request INTERNET permission");
+}
+
+for (const domain of ["root", "file", "database", "sharedpref", "external"]) {
+  const exclusion = `<exclude domain="${domain}" path="." />`;
+  if (!backupRules.includes(exclusion)) {
+    failures.push(`legacy backup rules do not exclude ${domain}`);
+  }
+  const extractionOccurrences = extractionRules.split(exclusion).length - 1;
+  if (extractionOccurrences !== 2) {
+    failures.push(
+      `data extraction rules must exclude ${domain} from cloud backup and device transfer`,
+    );
+  }
+}
+
+if (failures.length > 0) {
+  console.error("Local-data boundary verification failed:");
+  for (const failure of failures) console.error(`- ${failure}`);
+  process.exitCode = 1;
+} else {
+  console.log("Local-data boundary verification passed.");
+}

settings.gradle.kts

@@ -14,6 +14,6 @@ dependencyResolutionManagement {
     }
 }
 
-// Repository code name only. This is not the formal product name (TBD-001).
+// The repository keeps its original code name; the Android product identity is defined in :app.
 rootProject.name = "brainwave"
 include(":app")