Initial Android app: license list and key generation.

Kotlin Compose admin client for TTRPG Player license server with branding and settings for server URL and admin token. Co-authored-by: Cursor <cursoragent@cursor.com>
2026-06-28 12:35:39 +08:00
commit bbb861f920
30 changed files with 1459 additions and 0 deletions
@@ -0,0 +1,16 @@
+# Gradle
+.gradle/
+build/
+local.properties
+
+# Android Studio
+.idea/
+*.iml
+.DS_Store
+/captures
+.externalNativeBuild
+.cxx
+
+# Keystore
+*.jks
+*.keystore
@@ -0,0 +1,53 @@
+# TTRPG License Manager
+
+Android-приложение для администрирования лицензий **TTRPG Player** через сервер [DndGamePlayerLicenseServer](https://git.mailib.ru/ifontosh/DndGamePlayerLicenseServer).
+
+## Возможности
+
+- **Лицензии** — список всех продуктовых ключей с параметрами (`sub`, `pid`, лимит устройств, срок, статус отзыва, активированные `deviceId`).
+- **Новый ключ** — генерация продуктового ключа через `POST /v1/admin/product-keys`.
+- **Настройки** — URL сервера и admin token (`LICENSE_ADMIN_TOKEN`).
+
+## Требования
+
+- Android Studio Ladybug (2024.2+) или новее
+- JDK 17
+- Android SDK 35
+
+## Сборка
+
+1. Откройте проект в Android Studio.
+2. При первом запуске укажите в **Настройках**:
+   - URL: `https://license.mailib.ru/` (или локальный сервер)
+   - Admin token с сервера (`LICENSE_ADMIN_TOKEN`)
+3. Run на устройстве или эмуляторе.
+
+```bash
+./gradlew assembleDebug
+```
+
+## API сервера
+
+Приложение использует admin-эндпоинты (Bearer token):
+
+| Метод | Путь | Описание |
+|-------|------|----------|
+| GET | `/v1/admin/licenses` | Список лицензий |
+| POST | `/v1/admin/product-keys` | Создание ключа |
+
+Перед использованием приложения задеплойте обновлённый сервер с этими эндпоинтами.
+
+## Логотип
+
+Иконка и брендинг — логотип TTRPG Player (фиолетовая молния `#8B5CF6`).
+
+## Локальная разработка с сервером
+
+```bash
+cd DndGamePlayerLicenseServer
+cp data.example.json data.json
+# задайте LICENSE_PRIVATE_KEY_PEM
+npm start
+```
+
+В приложении укажите URL `http://10.0.2.2:3847/` (эмулятор) и admin token.
@@ -0,0 +1,67 @@
+plugins {
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+    id("org.jetbrains.kotlin.plugin.compose")
+}
+
+android {
+    namespace = "ru.mailib.ttrpg.licensemanager"
+    compileSdk = 35
+
+    defaultConfig {
+        applicationId = "ru.mailib.ttrpg.licensemanager"
+        minSdk = 26
+        targetSdk = 35
+        versionCode = 1
+        versionName = "1.0.0"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro",
+            )
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
+    kotlinOptions {
+        jvmTarget = "17"
+    }
+
+    buildFeatures {
+        compose = true
+    }
+}
+
+dependencies {
+    val composeBom = platform("androidx.compose:compose-bom:2024.10.01")
+
+    implementation("androidx.core:core-ktx:1.15.0")
+    implementation("androidx.activity:activity-compose:1.9.3")
+    implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.8.7")
+    implementation("androidx.lifecycle:lifecycle-viewmodel-compose:2.8.7")
+    implementation("androidx.lifecycle:lifecycle-runtime-compose:2.8.7")
+    implementation(composeBom)
+    implementation("androidx.compose.ui:ui")
+    implementation("androidx.compose.ui:ui-tooling-preview")
+    implementation("androidx.compose.material3:material3")
+    implementation("androidx.compose.material:material")
+    implementation("androidx.compose.material:material-icons-extended")
+    implementation("androidx.navigation:navigation-compose:2.8.4")
+    implementation("androidx.datastore:datastore-preferences:1.1.1")
+
+    implementation("com.squareup.retrofit2:retrofit:2.11.0")
+    implementation("com.squareup.retrofit2:converter-gson:2.11.0")
+    implementation("com.squareup.okhttp3:okhttp:4.12.0")
+    implementation("com.squareup.okhttp3:logging-interceptor:4.12.0")
+
+    debugImplementation("androidx.compose.ui:ui-tooling")
+    debugImplementation("androidx.compose.ui:ui-test-manifest")
+}
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+# Keep Retrofit/Gson model fields
+-keepclassmembers class ru.mailib.ttrpg.licensemanager.data.** { *; }
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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@drawable/ic_app_logo"
+        android:label="@string/app_name"
+        android:roundIcon="@drawable/ic_app_logo"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.TTRPGLicenseManager"
+        android:usesCleartextTraffic="true">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:theme="@style/Theme.TTRPGLicenseManager">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
@@ -0,0 +1,125 @@
+package ru.mailib.ttrpg.licensemanager
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Add
+import androidx.compose.material.icons.filled.List
+import androidx.compose.material.icons.filled.Settings
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.NavigationBar
+import androidx.compose.material3.NavigationBarItem
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.compose.NavHost
+import androidx.navigation.compose.composable
+import androidx.navigation.compose.currentBackStackEntryAsState
+import androidx.navigation.compose.rememberNavController
+import ru.mailib.ttrpg.licensemanager.ui.AppLogo
+import ru.mailib.ttrpg.licensemanager.ui.LicenseManagerTheme
+import ru.mailib.ttrpg.licensemanager.ui.LicenseViewModel
+import ru.mailib.ttrpg.licensemanager.ui.screens.GenerateKeyScreen
+import ru.mailib.ttrpg.licensemanager.ui.screens.LicenseListScreen
+import ru.mailib.ttrpg.licensemanager.ui.screens.SettingsScreen
+
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContent {
+            LicenseManagerTheme {
+                LicenseManagerApp()
+            }
+        }
+    }
+}
+
+private object Routes {
+    const val LIST = "list"
+    const val GENERATE = "generate"
+    const val SETTINGS = "settings"
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun LicenseManagerApp(viewModel: LicenseViewModel = viewModel()) {
+    val navController = rememberNavController()
+    val backStack by navController.currentBackStackEntryAsState()
+    val currentRoute = backStack?.destination?.route
+
+    val topLevelRoutes = setOf(Routes.LIST, Routes.GENERATE)
+    val showBottomBar = currentRoute in topLevelRoutes
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = {
+                    Row(
+                        verticalAlignment = Alignment.CenterVertically,
+                        horizontalArrangement = Arrangement.spacedBy(12.dp),
+                    ) {
+                        AppLogo(size = 32.dp)
+                        Text(stringResource(R.string.app_name))
+                    }
+                },
+                actions = {
+                    IconButton(onClick = { navController.navigate(Routes.SETTINGS) }) {
+                        Icon(Icons.Default.Settings, contentDescription = stringResource(R.string.settings))
+                    }
+                },
+            )
+        },
+        bottomBar = {
+            if (showBottomBar) {
+                NavigationBar {
+                    NavigationBarItem(
+                        selected = currentRoute == Routes.LIST,
+                        onClick = { navController.navigate(Routes.LIST) },
+                        icon = { Icon(Icons.Default.List, contentDescription = null) },
+                        label = { Text(stringResource(R.string.tab_licenses)) },
+                    )
+                    NavigationBarItem(
+                        selected = currentRoute == Routes.GENERATE,
+                        onClick = { navController.navigate(Routes.GENERATE) },
+                        icon = { Icon(Icons.Default.Add, contentDescription = null) },
+                        label = { Text(stringResource(R.string.tab_generate)) },
+                    )
+                }
+            }
+        },
+    ) { padding ->
+        NavHost(
+            navController = navController,
+            startDestination = Routes.LIST,
+            modifier = Modifier.padding(padding),
+        ) {
+            composable(Routes.LIST) {
+                LicenseListScreen(viewModel)
+            }
+            composable(Routes.GENERATE) {
+                GenerateKeyScreen(viewModel)
+            }
+            composable(Routes.SETTINGS) {
+                SettingsScreen(
+                    viewModel = viewModel,
+                    onBack = { navController.popBackStack() },
+                )
+            }
+        }
+    }
+}
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+package ru.mailib.ttrpg.licensemanager.data
+
+import retrofit2.http.Body
+import retrofit2.http.GET
+import retrofit2.http.POST
+
+interface LicenseApi {
+    @GET("v1/admin/licenses")
+    suspend fun listLicenses(): LicensesResponse
+
+    @POST("v1/admin/product-keys")
+    suspend fun createProductKey(@Body body: CreateProductKeyRequest): ProductKeyResponse
+}
@@ -0,0 +1,36 @@
+package ru.mailib.ttrpg.licensemanager.data
+
+import com.google.gson.annotations.SerializedName
+
+data class LicenseEntry(
+    val key: String,
+    val sub: String,
+    val pid: String,
+    val maxDevices: Int,
+    val expiresAtSec: Long,
+    val revoked: Boolean,
+    val activatedDevices: List<String>,
+    val activatedCount: Int,
+)
+
+data class LicensesResponse(
+    val licenses: List<LicenseEntry>,
+)
+
+data class CreateProductKeyRequest(
+    val pid: String = "dnd_player",
+    val maxDevices: Int,
+    val expiresAtSec: Long,
+)
+
+data class ProductKeyResponse(
+    val key: String,
+    val sub: String,
+    val pid: String,
+    val maxDevices: Int,
+    val expiresAtSec: Long,
+)
+
+data class ApiErrorBody(
+    @SerializedName("error") val error: String?,
+)
@@ -0,0 +1,90 @@
+package ru.mailib.ttrpg.licensemanager.data
+
+import android.content.Context
+import androidx.datastore.core.DataStore
+import androidx.datastore.preferences.core.Preferences
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.core.stringPreferencesKey
+import androidx.datastore.preferences.preferencesDataStore
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
+import okhttp3.Interceptor
+import okhttp3.OkHttpClient
+import okhttp3.logging.HttpLoggingInterceptor
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+
+private val Context.dataStore: DataStore<Preferences> by preferencesDataStore(name = "settings")
+
+data class AppSettings(
+    val serverUrl: String = DEFAULT_SERVER_URL,
+    val adminToken: String = "",
+) {
+    companion object {
+        const val DEFAULT_SERVER_URL = "https://license.mailib.ru/"
+    }
+}
+
+class SettingsRepository(private val context: Context) {
+    private val serverUrlKey = stringPreferencesKey("server_url")
+    private val adminTokenKey = stringPreferencesKey("admin_token")
+
+    val settings: Flow<AppSettings> = context.dataStore.data.map { prefs ->
+        AppSettings(
+            serverUrl = prefs[serverUrlKey] ?: AppSettings.DEFAULT_SERVER_URL,
+            adminToken = prefs[adminTokenKey].orEmpty(),
+        )
+    }
+
+    suspend fun save(serverUrl: String, adminToken: String) {
+        context.dataStore.edit { prefs ->
+            prefs[serverUrlKey] = serverUrl.trim().let { url ->
+                if (url.endsWith("/")) url else "$url/"
+            }
+            prefs[adminTokenKey] = adminToken.trim()
+        }
+    }
+}
+
+class LicenseRepository(
+    private val settingsRepository: SettingsRepository,
+) {
+    suspend fun listLicenses(settings: AppSettings): Result<List<LicenseEntry>> = runCatching {
+        createApi(settings).listLicenses().licenses
+    }
+
+    suspend fun createProductKey(
+        settings: AppSettings,
+        request: CreateProductKeyRequest,
+    ): Result<ProductKeyResponse> = runCatching {
+        createApi(settings).createProductKey(request)
+    }
+
+    private fun createApi(settings: AppSettings): LicenseApi {
+        require(settings.adminToken.isNotBlank()) { "Укажите admin token в настройках" }
+        val baseUrl = settings.serverUrl
+
+        val authInterceptor = Interceptor { chain ->
+            val request = chain.request().newBuilder()
+                .header("Authorization", "Bearer ${settings.adminToken}")
+                .build()
+            chain.proceed(request)
+        }
+
+        val logging = HttpLoggingInterceptor().apply {
+            level = HttpLoggingInterceptor.Level.BASIC
+        }
+
+        val client = OkHttpClient.Builder()
+            .addInterceptor(authInterceptor)
+            .addInterceptor(logging)
+            .build()
+
+        return Retrofit.Builder()
+            .baseUrl(baseUrl)
+            .client(client)
+            .addConverterFactory(GsonConverterFactory.create())
+            .build()
+            .create(LicenseApi::class.java)
+    }
+}
@@ -0,0 +1,19 @@
+package ru.mailib.ttrpg.licensemanager.ui
+
+import androidx.compose.foundation.layout.size
+import androidx.compose.material3.Icon
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.unit.Dp
+import ru.mailib.ttrpg.licensemanager.R
+
+@Composable
+fun AppLogo(modifier: Modifier = Modifier, size: Dp) {
+    Icon(
+        painter = painterResource(R.drawable.ic_app_logo),
+        contentDescription = null,
+        modifier = modifier.size(size),
+        tint = androidx.compose.ui.graphics.Color.Unspecified,
+    )
+}
@@ -0,0 +1,158 @@
+package ru.mailib.ttrpg.licensemanager.ui
+
+import android.app.Application
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.stateIn
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import ru.mailib.ttrpg.licensemanager.data.AppSettings
+import ru.mailib.ttrpg.licensemanager.data.CreateProductKeyRequest
+import ru.mailib.ttrpg.licensemanager.data.LicenseEntry
+import ru.mailib.ttrpg.licensemanager.data.LicenseRepository
+import ru.mailib.ttrpg.licensemanager.data.ProductKeyResponse
+import ru.mailib.ttrpg.licensemanager.data.SettingsRepository
+import java.time.Instant
+import java.time.LocalDate
+import java.time.ZoneOffset
+
+data class LicenseListUiState(
+    val licenses: List<LicenseEntry> = emptyList(),
+    val isLoading: Boolean = false,
+    val error: String? = null,
+)
+
+data class GenerateKeyUiState(
+    val pid: String = "dnd_player",
+    val maxDevices: String = "3",
+    val expiryDate: LocalDate = LocalDate.of(2027, 12, 31),
+    val isSubmitting: Boolean = false,
+    val error: String? = null,
+    val createdKey: ProductKeyResponse? = null,
+)
+
+data class SettingsUiState(
+    val serverUrl: String = AppSettings.DEFAULT_SERVER_URL,
+    val adminToken: String = "",
+    val savedMessage: String? = null,
+)
+
+class LicenseViewModel(application: Application) : AndroidViewModel(application) {
+    private val settingsRepository = SettingsRepository(application)
+    private val licenseRepository = LicenseRepository(settingsRepository)
+
+    val settings: StateFlow<AppSettings> = settingsRepository.settings
+        .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5_000), AppSettings())
+
+    private val _listState = MutableStateFlow(LicenseListUiState())
+    val listState: StateFlow<LicenseListUiState> = _listState.asStateFlow()
+
+    private val _generateState = MutableStateFlow(GenerateKeyUiState())
+    val generateState: StateFlow<GenerateKeyUiState> = _generateState.asStateFlow()
+
+    private val _settingsState = MutableStateFlow(SettingsUiState())
+    val settingsState: StateFlow<SettingsUiState> = _settingsState.asStateFlow()
+
+    init {
+        viewModelScope.launch {
+            settings.collect { appSettings ->
+                _settingsState.update {
+                    it.copy(
+                        serverUrl = appSettings.serverUrl,
+                        adminToken = appSettings.adminToken,
+                    )
+                }
+            }
+        }
+    }
+
+    fun loadLicenses() {
+        viewModelScope.launch {
+            val currentSettings = settings.value
+            _listState.update { it.copy(isLoading = true, error = null) }
+            licenseRepository.listLicenses(currentSettings)
+                .onSuccess { licenses ->
+                    _listState.update { it.copy(isLoading = false, licenses = licenses, error = null) }
+                }
+                .onFailure { e ->
+                    _listState.update { it.copy(isLoading = false, error = e.message ?: "Ошибка загрузки") }
+                }
+        }
+    }
+
+    fun updatePid(value: String) {
+        _generateState.update { it.copy(pid = value, error = null) }
+    }
+
+    fun updateMaxDevices(value: String) {
+        _generateState.update { it.copy(maxDevices = value.filter { ch -> ch.isDigit() }.take(2), error = null) }
+    }
+
+    fun updateExpiryDate(date: LocalDate) {
+        _generateState.update { it.copy(expiryDate = date, error = null) }
+    }
+
+    fun clearCreatedKey() {
+        _generateState.update { it.copy(createdKey = null) }
+    }
+
+    fun generateKey() {
+        val state = _generateState.value
+        val maxDevices = state.maxDevices.toIntOrNull()
+        if (maxDevices == null || maxDevices < 1) {
+            _generateState.update { it.copy(error = "Укажите число устройств (минимум 1)") }
+            return
+        }
+        if (state.pid.isBlank()) {
+            _generateState.update { it.copy(error = "Укажите product id") }
+            return
+        }
+
+        val expiresAtSec = state.expiryDate
+            .plusDays(1)
+            .atStartOfDay()
+            .toEpochSecond(ZoneOffset.UTC) - 1
+
+        viewModelScope.launch {
+            _generateState.update { it.copy(isSubmitting = true, error = null, createdKey = null) }
+            licenseRepository.createProductKey(
+                settings.value,
+                CreateProductKeyRequest(
+                    pid = state.pid.trim(),
+                    maxDevices = maxDevices,
+                    expiresAtSec = expiresAtSec,
+                ),
+            )
+                .onSuccess { created ->
+                    _generateState.update { it.copy(isSubmitting = false, createdKey = created) }
+                    loadLicenses()
+                }
+                .onFailure { e ->
+                    _generateState.update {
+                        it.copy(isSubmitting = false, error = e.message ?: "Не удалось создать ключ")
+                    }
+                }
+        }
+    }
+
+    fun updateSettingsDraft(serverUrl: String, adminToken: String) {
+        _settingsState.update {
+            it.copy(serverUrl = serverUrl, adminToken = adminToken, savedMessage = null)
+        }
+    }
+
+    fun saveSettings() {
+        val draft = _settingsState.value
+        viewModelScope.launch {
+            settingsRepository.save(draft.serverUrl, draft.adminToken)
+            _settingsState.update { it.copy(savedMessage = "Сохранено") }
+        }
+    }
+}
+
+fun formatEpochSec(sec: Long): String =
+    Instant.ofEpochSecond(sec).atZone(ZoneOffset.UTC).toLocalDate().toString()
@@ -0,0 +1,35 @@
+package ru.mailib.ttrpg.licensemanager.ui
+
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.material3.lightColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.graphics.Color
+
+private val BrandPurple = Color(0xFF8B5CF6)
+private val BrandPurpleDark = Color(0xFF6D28D9)
+
+private val LightColors = lightColorScheme(
+    primary = BrandPurple,
+    onPrimary = Color.White,
+    primaryContainer = Color(0xFFEDE9FE),
+    onPrimaryContainer = BrandPurpleDark,
+    secondary = Color(0xFF64748B),
+)
+
+private val DarkColors = darkColorScheme(
+    primary = BrandPurple,
+    onPrimary = Color.White,
+    primaryContainer = BrandPurpleDark,
+    onPrimaryContainer = Color(0xFFEDE9FE),
+    secondary = Color(0xFF94A3B8),
+)
+
+@Composable
+fun LicenseManagerTheme(content: @Composable () -> Unit) {
+    MaterialTheme(
+        colorScheme = if (isSystemInDarkTheme()) DarkColors else LightColors,
+        content = content,
+    )
+}
@@ -0,0 +1,145 @@
+package ru.mailib.ttrpg.licensemanager.ui.screens
+
+import android.app.DatePickerDialog
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+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.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.ContentCopy
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalClipboardManager
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.AnnotatedString
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import ru.mailib.ttrpg.licensemanager.ui.LicenseViewModel
+import ru.mailib.ttrpg.licensemanager.ui.formatEpochSec
+import java.time.LocalDate
+import java.util.Calendar
+
+@Composable
+fun GenerateKeyScreen(viewModel: LicenseViewModel) {
+    val state by viewModel.generateState.collectAsStateWithLifecycle()
+    val context = LocalContext.current
+    val clipboard = LocalClipboardManager.current
+
+    val showDatePicker = remember(state.expiryDate) {
+        {
+            val cal = Calendar.getInstance().apply {
+                set(state.expiryDate.year, state.expiryDate.monthValue - 1, state.expiryDate.dayOfMonth)
+            }
+            DatePickerDialog(
+                context,
+                { _, year, month, day ->
+                    viewModel.updateExpiryDate(LocalDate.of(year, month + 1, day))
+                },
+                cal.get(Calendar.YEAR),
+                cal.get(Calendar.MONTH),
+                cal.get(Calendar.DAY_OF_MONTH),
+            ).show()
+        }
+    }
+
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .verticalScroll(rememberScrollState())
+            .padding(16.dp),
+        verticalArrangement = Arrangement.spacedBy(12.dp),
+    ) {
+        Text(
+            text = "Новый продуктовый ключ",
+            style = MaterialTheme.typography.headlineSmall,
+            fontWeight = FontWeight.SemiBold,
+        )
+        Text(
+            text = "Ключ будет добавлен в data.json на сервере. Передайте его пользователю для активации в TTRPG Player.",
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+
+        OutlinedTextField(
+            value = state.pid,
+            onValueChange = viewModel::updatePid,
+            label = { Text("Product ID (pid)") },
+            modifier = Modifier.fillMaxWidth(),
+            singleLine = true,
+        )
+
+        OutlinedTextField(
+            value = state.maxDevices,
+            onValueChange = viewModel::updateMaxDevices,
+            label = { Text("Макс. устройств") },
+            modifier = Modifier.fillMaxWidth(),
+            singleLine = true,
+        )
+
+        OutlinedButton(onClick = showDatePicker, modifier = Modifier.fillMaxWidth()) {
+            Text("Срок действия: ${state.expiryDate}")
+        }
+
+        if (state.error != null) {
+            ErrorMessage(message = state.error ?: "")
+        }
+
+        Button(
+            onClick = viewModel::generateKey,
+            enabled = !state.isSubmitting,
+            modifier = Modifier.fillMaxWidth(),
+        ) {
+            if (state.isSubmitting) {
+                CircularProgressIndicator(
+                    modifier = Modifier.height(20.dp),
+                    strokeWidth = 2.dp,
+                )
+            } else {
+                Text("Сгенерировать ключ")
+            }
+        }
+
+        state.createdKey?.let { created ->
+            Spacer(modifier = Modifier.height(8.dp))
+            Card(
+                colors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.primaryContainer),
+                modifier = Modifier.fillMaxWidth(),
+            ) {
+                Column(modifier = Modifier.padding(16.dp), verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                    Text("Ключ создан", style = MaterialTheme.typography.titleMedium, fontWeight = FontWeight.SemiBold)
+                    Text(
+                        text = created.key,
+                        fontFamily = FontFamily.Monospace,
+                        style = MaterialTheme.typography.bodyLarge,
+                    )
+                    Text("sub: ${created.sub}")
+                    Text("Срок до: ${formatEpochSec(created.expiresAtSec)}")
+                    IconButton(
+                        onClick = { clipboard.setText(AnnotatedString(created.key)) },
+                    ) {
+                        Icon(Icons.Default.ContentCopy, contentDescription = "Копировать ключ")
+                    }
+                }
+            }
+        }
+    }
+}
@@ -0,0 +1,146 @@
+package ru.mailib.ttrpg.licensemanager.ui.screens
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material.ExperimentalMaterialApi
+import androidx.compose.material.pullrefresh.PullRefreshIndicator
+import androidx.compose.material.pullrefresh.pullRefresh
+import androidx.compose.material.pullrefresh.rememberPullRefreshState
+import androidx.compose.material3.Card
+import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import ru.mailib.ttrpg.licensemanager.data.LicenseEntry
+import ru.mailib.ttrpg.licensemanager.ui.LicenseViewModel
+import ru.mailib.ttrpg.licensemanager.ui.formatEpochSec
+
+@OptIn(ExperimentalMaterialApi::class)
+@Composable
+fun LicenseListScreen(viewModel: LicenseViewModel) {
+    val state by viewModel.listState.collectAsStateWithLifecycle()
+    val refreshState = rememberPullRefreshState(
+        refreshing = state.isLoading,
+        onRefresh = viewModel::loadLicenses,
+    )
+
+    LaunchedEffect(Unit) {
+        viewModel.loadLicenses()
+    }
+
+    Box(
+        modifier = Modifier
+            .fillMaxSize()
+            .pullRefresh(refreshState),
+    ) {
+        when {
+            state.error != null && state.licenses.isEmpty() -> {
+                ErrorMessage(
+                    message = state.error ?: "",
+                    modifier = Modifier.align(Alignment.Center),
+                )
+            }
+
+            state.licenses.isEmpty() && state.isLoading -> {
+                CircularProgressIndicator(modifier = Modifier.align(Alignment.Center))
+            }
+
+            state.licenses.isEmpty() -> {
+                Text(
+                    text = "Лицензий пока нет",
+                    modifier = Modifier.align(Alignment.Center),
+                    style = MaterialTheme.typography.bodyLarge,
+                )
+            }
+
+            else -> {
+                LazyColumn(
+                    contentPadding = PaddingValues(16.dp),
+                    verticalArrangement = Arrangement.spacedBy(12.dp),
+                ) {
+                    items(state.licenses, key = { it.sub }) { license ->
+                        LicenseCard(license)
+                    }
+                }
+            }
+        }
+
+        PullRefreshIndicator(
+            refreshing = state.isLoading,
+            state = refreshState,
+            modifier = Modifier.align(Alignment.TopCenter),
+        )
+    }
+}
+
+@Composable
+private fun LicenseCard(license: LicenseEntry) {
+    Card(
+        modifier = Modifier.fillMaxWidth(),
+        colors = CardDefaults.cardColors(
+            containerColor = if (license.revoked) {
+                MaterialTheme.colorScheme.errorContainer
+            } else {
+                MaterialTheme.colorScheme.surfaceContainerHigh
+            },
+        ),
+    ) {
+        Column(modifier = Modifier.padding(16.dp), verticalArrangement = Arrangement.spacedBy(6.dp)) {
+            Text(
+                text = license.key,
+                style = MaterialTheme.typography.titleMedium,
+                fontFamily = FontFamily.Monospace,
+                fontWeight = FontWeight.SemiBold,
+            )
+            DetailRow("sub", license.sub)
+            DetailRow("pid", license.pid)
+            DetailRow("Устройства", "${license.activatedCount} / ${license.maxDevices}")
+            DetailRow("Срок до", formatEpochSec(license.expiresAtSec))
+            DetailRow("Статус", if (license.revoked) "Отозвана" else "Активна")
+            if (license.activatedDevices.isNotEmpty()) {
+                DetailRow("deviceId", license.activatedDevices.joinToString(", "))
+            }
+        }
+    }
+}
+
+@Composable
+private fun DetailRow(label: String, value: String) {
+    Text(
+        text = "$label: $value",
+        style = MaterialTheme.typography.bodyMedium,
+        color = MaterialTheme.colorScheme.onSurfaceVariant,
+    )
+}
+
+@Composable
+fun ErrorMessage(message: String, modifier: Modifier = Modifier) {
+    Surface(
+        modifier = modifier.padding(24.dp),
+        color = MaterialTheme.colorScheme.errorContainer,
+        shape = MaterialTheme.shapes.medium,
+    ) {
+        Text(
+            text = message,
+            modifier = Modifier.padding(16.dp),
+            color = MaterialTheme.colorScheme.onErrorContainer,
+        )
+    }
+}
@@ -0,0 +1,71 @@
+package ru.mailib.ttrpg.licensemanager.ui.screens
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Button
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.input.PasswordVisualTransformation
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import ru.mailib.ttrpg.licensemanager.ui.LicenseViewModel
+
+@Composable
+fun SettingsScreen(viewModel: LicenseViewModel, onBack: () -> Unit) {
+    val state by viewModel.settingsState.collectAsStateWithLifecycle()
+
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(16.dp),
+        verticalArrangement = Arrangement.spacedBy(12.dp),
+    ) {
+        Text(
+            text = "Настройки сервера",
+            style = MaterialTheme.typography.headlineSmall,
+            fontWeight = FontWeight.SemiBold,
+        )
+
+        OutlinedTextField(
+            value = state.serverUrl,
+            onValueChange = { value -> viewModel.updateSettingsDraft(value, state.adminToken) },
+            label = { Text("URL сервера") },
+            modifier = Modifier.fillMaxWidth(),
+            singleLine = true,
+        )
+
+        OutlinedTextField(
+            value = state.adminToken,
+            onValueChange = { value -> viewModel.updateSettingsDraft(state.serverUrl, value) },
+            label = { Text("Admin token (LICENSE_ADMIN_TOKEN)") },
+            modifier = Modifier.fillMaxWidth(),
+            singleLine = true,
+            visualTransformation = PasswordVisualTransformation(),
+        )
+
+        if (state.savedMessage != null) {
+            Text(
+                text = state.savedMessage ?: "",
+                color = MaterialTheme.colorScheme.primary,
+            )
+        }
+
+        Button(
+            onClick = {
+                viewModel.saveSettings()
+                onBack()
+            },
+            modifier = Modifier.fillMaxWidth(),
+        ) {
+            Text("Сохранить")
+        }
+    }
+}
@@ -0,0 +1,10 @@
+<svg width="32" height="32" viewBox="0 0 32 32" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <rect width="32" height="32" rx="12" fill="#8B5CF6" />
+  <path
+    d="M9.33333 17.6667C9.01146 17.6678 8.71773 17.4834 8.57879 17.193C8.43985 16.9027 8.48055 16.5583 8.68333 16.3083L16.9333 7.80833C17.0608 7.66121 17.2731 7.62194 17.4448 7.71375C17.6164 7.80556 17.7016 8.00398 17.65 8.19167L16.05 13.2083C15.9542 13.4646 15.9904 13.7516 16.1467 13.9762C16.3031 14.2007 16.5597 14.3342 16.8333 14.3333H22.6667C22.9885 14.3322 23.2823 14.5166 23.4212 14.807C23.5601 15.0973 23.5195 15.4417 23.3167 15.6917L15.0667 24.1917C14.9392 24.3388 14.7269 24.3781 14.5552 24.2862C14.3836 24.1944 14.2984 23.996 14.35 23.8083L15.95 18.7917C16.0458 18.5354 16.0096 18.2484 15.8533 18.0238C15.6969 17.7993 15.4403 17.6658 15.1667 17.6667H9.33333"
+    stroke="white"
+    stroke-width="1.66667"
+    stroke-linecap="round"
+    stroke-linejoin="round"
+  />
+</svg>
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="32"
+    android:viewportHeight="32">
+    <path
+        android:fillColor="#8B5CF6"
+        android:pathData="M0,0h32v32h-32z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9.333,17.667c-0.322,0.002 -0.615,-0.182 -0.754,-0.474c-0.139,-0.291 -0.098,-0.635 0.104,-0.885l8.25,-8.5c0.128,-0.147 0.34,-0.186 0.512,-0.094c0.172,0.092 0.257,0.29 0.206,0.478l-1.6,5.017c-0.096,0.256 -0.06,0.543 0.097,0.768c0.156,0.225 0.413,0.358 0.687,0.357h5.833c0.322,-0.001 0.616,0.183 0.755,0.474c0.139,0.29 0.098,0.635 -0.105,0.885l-8.25,8.5c-0.127,0.147 -0.34,0.186 -0.512,0.094c-0.172,-0.092 -0.257,-0.29 -0.206,-0.478l1.6,-5.017c0.096,-0.256 0.06,-0.543 -0.097,-0.768c-0.156,-0.225 -0.413,-0.358 -0.687,-0.357z"
+        android:strokeWidth="1.667"
+        android:strokeColor="#FFFFFF"
+        android:strokeLineCap="round"
+        android:strokeLineJoin="round" />
+</vector>
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#8B5CF6"
+        android:pathData="M0,0h108v108h-108z" />
+</vector>
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="32"
+    android:viewportHeight="32">
+    <group
+        android:translateX="38"
+        android:translateY="38"
+        android:scaleX="1"
+        android:scaleY="1">
+        <path
+            android:fillColor="#00000000"
+            android:pathData="M9.333,17.667c-0.322,0.002 -0.615,-0.182 -0.754,-0.474c-0.139,-0.291 -0.098,-0.635 0.104,-0.885l8.25,-8.5c0.128,-0.147 0.34,-0.186 0.512,-0.094c0.172,0.092 0.257,0.29 0.206,0.478l-1.6,5.017c-0.096,0.256 -0.06,0.543 0.097,0.768c0.156,0.225 0.413,0.358 0.687,0.357h5.833c0.322,-0.001 0.616,0.183 0.755,0.474c0.139,0.29 0.098,0.635 -0.105,0.885l-8.25,8.5c-0.127,0.147 -0.34,0.186 -0.512,0.094c-0.172,-0.092 -0.257,-0.29 -0.206,-0.478l1.6,-5.017c0.096,-0.256 0.06,-0.543 -0.097,-0.768c-0.156,-0.225 -0.413,-0.358 -0.687,-0.357z"
+            android:strokeWidth="1.667"
+            android:strokeColor="#FFFFFF"
+            android:strokeLineCap="round"
+            android:strokeLineJoin="round" />
+    </group>
+</vector>
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">TTRPG License Manager</string>
+    <string name="tab_licenses">Лицензии</string>
+    <string name="tab_generate">Новый ключ</string>
+    <string name="settings">Настройки</string>
+</resources>
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="Theme.TTRPGLicenseManager" parent="android:Theme.Material.Light.NoActionBar" />
+</resources>
@@ -0,0 +1,5 @@
+plugins {
+    id("com.android.application") version "8.7.3" apply false
+    id("org.jetbrains.kotlin.android") version "2.0.21" apply false
+    id("org.jetbrains.kotlin.plugin.compose") version "2.0.21" apply false
+}
@@ -0,0 +1,4 @@
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+android.useAndroidX=true
+kotlin.code.style=official
+android.nonTransitiveRClass=true
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
@@ -0,0 +1,252 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
+' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='-Dfile.encoding=UTF-8 "-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
@@ -0,0 +1,94 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=-Dfile.encoding=UTF-8 "-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
@@ -0,0 +1,18 @@
+pluginManagement {
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
+dependencyResolutionManagement {
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+rootProject.name = "TTRPGLicenseManager"
+include(":app")