feat(eq): настоящий эквалайзер + улучшайзеры звука (audiofx)

Раньше пресет эквалайзера в настройках был косметикой (лежал в DataStore, к звуку
не подключён). Теперь — реальные системные эффекты на фикс. аудиосессии плеера:
- AudioEffectsController: графический Equalizer (полосы устройства), BassBoost,
  Virtualizer (объём), LoudnessEnhancer (громкость тихих, до +12 дБ). Привязка к
  generateAudioSessionId() в PlayerController, переживает смену станций. Применение
  в реальном времени, сохранение в DataStore (commit на отпускании слайдера).
- Отдельный экран EqualizerScreen (Настройки → ЗВУК → Эквалайзер): тумблер,
  системные пресеты + «Свой», слайдеры полос (±дБ), bass/virtualizer/loudness.
- Эффекты best-effort: при отсутствии поддержки блок недоступен (null), UI скрывает.
- Убран фейковый чип-пресет Flat/Rock/Pop/Jazz/Bass.

app/src/main/java/com/radiola/MainActivity.kt

@@ -177,6 +177,9 @@ class MainActivity : ComponentActivity() {
                                 },
                                 onNavigateToAlarms = {
                                     navController.navigate(NavDestinations.Alarms.route)
+                                },
+                                onNavigateToEqualizer = {
+                                    navController.navigate(NavDestinations.Equalizer.route)
                                 }
                             )
                         }
@@ -185,6 +188,11 @@ class MainActivity : ComponentActivity() {
                                 onNavigateBack = { navController.popBackStack() }
                             )
                         }
+                        composable(NavDestinations.Equalizer.route) {
+                            com.radiola.ui.equalizer.EqualizerScreen(
+                                onNavigateBack = { navController.popBackStack() }
+                            )
+                        }
                         composable(NavDestinations.Auth.route) {
                             AuthScreen(
                                 onAuthSuccess = {

app/src/main/java/com/radiola/data/repository/SettingsRepositoryImpl.kt

@@ -33,6 +33,12 @@ class SettingsRepositoryImpl @Inject constructor(
         private val COUNTRY_CODE = stringPreferencesKey("country_code")
         private val VISUALIZER_STYLE = stringPreferencesKey("visualizer_style")
         private val THEME_PALETTE = stringPreferencesKey("theme_palette")
+        private val EQ_ENABLED = booleanPreferencesKey("eq_enabled")
+        private val EQ_PRESET = intPreferencesKey("eq_preset")
+        private val EQ_BANDS = stringPreferencesKey("eq_bands")
+        private val EQ_BASS = intPreferencesKey("eq_bass")
+        private val EQ_VIRTUALIZER = intPreferencesKey("eq_virtualizer")
+        private val EQ_LOUDNESS = intPreferencesKey("eq_loudness")
     }
 
     override fun getLastStationId(): Flow<Int?> = dataStore.data.map { it[LAST_STATION_ID] }
@@ -65,4 +71,22 @@ class SettingsRepositoryImpl @Inject constructor(
 
     override fun getThemePalette(): Flow<String> = dataStore.data.map { it[THEME_PALETTE] ?: "forest" }
     override suspend fun setThemePalette(id: String) { dataStore.edit { it[THEME_PALETTE] = id } }
+
+    override fun getEqEnabled(): Flow<Boolean> = dataStore.data.map { it[EQ_ENABLED] ?: false }
+    override suspend fun setEqEnabled(enabled: Boolean) { dataStore.edit { it[EQ_ENABLED] = enabled } }
+
+    override fun getEqPreset(): Flow<Int> = dataStore.data.map { it[EQ_PRESET] ?: -1 }
+    override suspend fun setEqPreset(index: Int) { dataStore.edit { it[EQ_PRESET] = index } }
+
+    override fun getEqBands(): Flow<String> = dataStore.data.map { it[EQ_BANDS] ?: "" }
+    override suspend fun setEqBands(csv: String) { dataStore.edit { it[EQ_BANDS] = csv } }
+
+    override fun getEqBass(): Flow<Int> = dataStore.data.map { it[EQ_BASS] ?: 0 }
+    override suspend fun setEqBass(value: Int) { dataStore.edit { it[EQ_BASS] = value } }
+
+    override fun getEqVirtualizer(): Flow<Int> = dataStore.data.map { it[EQ_VIRTUALIZER] ?: 0 }
+    override suspend fun setEqVirtualizer(value: Int) { dataStore.edit { it[EQ_VIRTUALIZER] = value } }
+
+    override fun getEqLoudness(): Flow<Int> = dataStore.data.map { it[EQ_LOUDNESS] ?: 0 }
+    override suspend fun setEqLoudness(value: Int) { dataStore.edit { it[EQ_LOUDNESS] = value } }
 }

app/src/main/java/com/radiola/domain/repository/SettingsRepository.kt

@@ -26,4 +26,20 @@ interface SettingsRepository {
     // Цветовая тема приложения (id ThemePalette, напр. "forest"). По умолчанию "forest".
     fun getThemePalette(): Flow<String>
     suspend fun setThemePalette(id: String)
+
+    // ── Эквалайзер и улучшайзеры звука (android.media.audiofx) ──
+    fun getEqEnabled(): Flow<Boolean>
+    suspend fun setEqEnabled(enabled: Boolean)
+    // Индекс системного пресета эквалайзера; -1 = свой (ручные полосы).
+    fun getEqPreset(): Flow<Int>
+    suspend fun setEqPreset(index: Int)
+    // Уровни полос в миллибелах через запятую (под текущее число полос устройства).
+    fun getEqBands(): Flow<String>
+    suspend fun setEqBands(csv: String)
+    fun getEqBass(): Flow<Int>           // 0..100 %
+    suspend fun setEqBass(value: Int)
+    fun getEqVirtualizer(): Flow<Int>    // 0..100 %
+    suspend fun setEqVirtualizer(value: Int)
+    fun getEqLoudness(): Flow<Int>       // 0..100 % → 0..+12 дБ
+    suspend fun setEqLoudness(value: Int)
 }

app/src/main/java/com/radiola/service/AudioEffectsController.kt

@@ -0,0 +1,259 @@
+package com.radiola.service
+
+import android.content.Context
+import android.media.audiofx.BassBoost
+import android.media.audiofx.Equalizer
+import android.media.audiofx.LoudnessEnhancer
+import android.media.audiofx.Virtualizer
+import android.util.Log
+import com.radiola.domain.repository.SettingsRepository
+import dagger.hilt.android.qualifiers.ApplicationContext
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+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 javax.inject.Inject
+import javax.inject.Singleton
+
+/** Одна полоса эквалайзера: центральная частота и текущий/предельный уровень в мБ. */
+data class EqBand(
+    val index: Int,
+    val centerHz: Int,
+    val minMb: Int,
+    val maxMb: Int,
+    val levelMb: Int
+)
+
+/** Снимок состояния эквалайзера и улучшайзеров для UI. */
+data class EqState(
+    val available: Boolean = false,
+    val enabled: Boolean = false,
+    val bands: List<EqBand> = emptyList(),
+    val presets: List<String> = emptyList(),
+    val currentPreset: Int = -1, // -1 = свой
+    val hasBass: Boolean = false,
+    val hasVirtualizer: Boolean = false,
+    val hasLoudness: Boolean = false,
+    val bass: Int = 0,        // 0..100 %
+    val virtualizer: Int = 0, // 0..100 %
+    val loudness: Int = 0     // 0..100 % → 0..+12 дБ
+)
+
+/**
+ * Управляет системными аудиоэффектами (android.media.audiofx), привязанными к
+ * аудиосессии плеера: графический эквалайзер + Bass Boost + Virtualizer (объём) +
+ * LoudnessEnhancer (громкость тихих). Применяет в реальном времени, переживает смену
+ * станции (сессия фиксированная), сохраняет настройки в DataStore. Эффекты — best-effort:
+ * на устройствах без поддержки соответствующий блок просто недоступен (null).
+ */
+@Singleton
+class AudioEffectsController @Inject constructor(
+    @ApplicationContext private val context: Context,
+    private val settings: SettingsRepository
+) {
+    private val tag = "AudioEffects"
+    private val scope = CoroutineScope(Dispatchers.Main + SupervisorJob())
+
+    private var equalizer: Equalizer? = null
+    private var bassBoost: BassBoost? = null
+    private var virtualizer: Virtualizer? = null
+    private var loudness: LoudnessEnhancer? = null
+    private var masterEnabled = false
+
+    private val _state = MutableStateFlow(EqState())
+    val state: StateFlow<EqState> = _state.asStateFlow()
+
+    /** Привязывает эффекты к аудиосессии и применяет сохранённые настройки. */
+    fun attach(sessionId: Int) {
+        release()
+        equalizer = try {
+            Equalizer(0, sessionId)
+        } catch (e: Exception) {
+            Log.w(tag, "Equalizer недоступен: ${e.message}"); null
+        }
+        bassBoost = try {
+            BassBoost(0, sessionId).let { if (it.strengthSupported) it else { it.release(); null } }
+        } catch (e: Exception) {
+            null
+        }
+        virtualizer = try {
+            Virtualizer(0, sessionId).let { if (it.strengthSupported) it else { it.release(); null } }
+        } catch (e: Exception) {
+            null
+        }
+        loudness = try {
+            LoudnessEnhancer(sessionId)
+        } catch (e: Exception) {
+            null
+        }
+        scope.launch { loadAndApply() }
+    }
+
+    private suspend fun loadAndApply() {
+        val enabled = settings.getEqEnabled().first()
+        val preset = settings.getEqPreset().first()
+        val bandsCsv = settings.getEqBands().first()
+        val bass = settings.getEqBass().first()
+        val virt = settings.getEqVirtualizer().first()
+        val loud = settings.getEqLoudness().first()
+
+        masterEnabled = enabled
+        val eq = equalizer
+        if (eq != null) {
+            runCatching { eq.enabled = enabled }
+            val saved = bandsCsv.split(",").mapNotNull { it.trim().toShortOrNull() }
+            if (preset in 0 until eq.numberOfPresets) {
+                runCatching { eq.usePreset(preset.toShort()) }
+            } else if (saved.size == eq.numberOfBands.toInt()) {
+                saved.forEachIndexed { i, lvl -> runCatching { eq.setBandLevel(i.toShort(), lvl) } }
+            }
+        }
+        applyBassInternal(bass)
+        applyVirtualizerInternal(virt)
+        applyLoudnessInternal(loud)
+        emitState(enabled, preset, bass, virt, loud)
+    }
+
+    // ── Публичные действия (UI) ──
+
+    fun setEnabled(on: Boolean) {
+        masterEnabled = on
+        runCatching { equalizer?.enabled = on }
+        val s = _state.value
+        applyBassInternal(s.bass)
+        applyVirtualizerInternal(s.virtualizer)
+        applyLoudnessInternal(s.loudness)
+        persist { settings.setEqEnabled(on) }
+        _state.value = s.copy(enabled = on)
+    }
+
+    fun selectPreset(index: Int) {
+        val eq = equalizer ?: return
+        if (index !in 0 until eq.numberOfPresets) return
+        runCatching { eq.usePreset(index.toShort()) }
+        persist { settings.setEqPreset(index); settings.setEqBands(currentBandsCsv()) }
+        emitState(_state.value.enabled, index, _state.value.bass, _state.value.virtualizer, _state.value.loudness)
+    }
+
+    // setBand/setBass/... применяют к железу + правят in-memory состояние БЕЗ записи в
+    // DataStore (вызываются на каждое движение слайдера). Запись — один раз в commit()
+    // на onValueChangeFinished, чтобы не спамить хранилище десятками правок за драг.
+
+    fun setBand(index: Int, levelMb: Int) {
+        val eq = equalizer ?: return
+        runCatching { eq.setBandLevel(index.toShort(), levelMb.toShort()) }
+        val s = _state.value
+        _state.value = s.copy(
+            currentPreset = -1, // ручная правка → «свой»
+            bands = s.bands.map { if (it.index == index) it.copy(levelMb = levelMb) else it }
+        )
+    }
+
+    fun setBass(value: Int) {
+        applyBassInternal(value)
+        _state.value = _state.value.copy(bass = value)
+    }
+
+    fun setVirtualizer(value: Int) {
+        applyVirtualizerInternal(value)
+        _state.value = _state.value.copy(virtualizer = value)
+    }
+
+    fun setLoudness(value: Int) {
+        applyLoudnessInternal(value)
+        _state.value = _state.value.copy(loudness = value)
+    }
+
+    /** Сохраняет текущее состояние полос/улучшайзеров (вызывать при отпускании слайдера). */
+    fun commit() {
+        val s = _state.value
+        persist {
+            settings.setEqPreset(s.currentPreset)
+            settings.setEqBands(currentBandsCsv())
+            settings.setEqBass(s.bass)
+            settings.setEqVirtualizer(s.virtualizer)
+            settings.setEqLoudness(s.loudness)
+        }
+    }
+
+    // ── Внутреннее применение к железу ──
+
+    private fun applyBassInternal(value: Int) {
+        val bb = bassBoost ?: return
+        runCatching {
+            bb.enabled = masterEnabled && value > 0
+            if (masterEnabled && value > 0) bb.setStrength((value.coerceIn(0, 100) * 10).toShort())
+        }
+    }
+
+    private fun applyVirtualizerInternal(value: Int) {
+        val vz = virtualizer ?: return
+        runCatching {
+            vz.enabled = masterEnabled && value > 0
+            if (masterEnabled && value > 0) vz.setStrength((value.coerceIn(0, 100) * 10).toShort())
+        }
+    }
+
+    private fun applyLoudnessInternal(value: Int) {
+        val le = loudness ?: return
+        runCatching {
+            le.enabled = masterEnabled && value > 0
+            // 0..100 % → 0..1200 мБ (= 0..+12 дБ)
+            if (masterEnabled && value > 0) le.setTargetGain(value.coerceIn(0, 100) * 12)
+        }
+    }
+
+    private fun currentBandsCsv(): String {
+        val eq = equalizer ?: return ""
+        return (0 until eq.numberOfBands).joinToString(",") { eq.getBandLevel(it.toShort()).toString() }
+    }
+
+    private fun emitState(enabled: Boolean, preset: Int, bass: Int, virt: Int, loud: Int) {
+        val eq = equalizer
+        val bands = if (eq != null) {
+            val range = eq.bandLevelRange // [min, max] в мБ
+            (0 until eq.numberOfBands).map { i ->
+                val b = i.toShort()
+                EqBand(
+                    index = i,
+                    centerHz = eq.getCenterFreq(b) / 1000, // мГц → Гц
+                    minMb = range[0].toInt(),
+                    maxMb = range[1].toInt(),
+                    levelMb = eq.getBandLevel(b).toInt()
+                )
+            }
+        } else emptyList()
+        val presets = if (eq != null) {
+            (0 until eq.numberOfPresets).map { eq.getPresetName(it.toShort()) }
+        } else emptyList()
+        _state.value = EqState(
+            available = eq != null,
+            enabled = enabled,
+            bands = bands,
+            presets = presets,
+            currentPreset = preset,
+            hasBass = bassBoost != null,
+            hasVirtualizer = virtualizer != null,
+            hasLoudness = loudness != null,
+            bass = bass,
+            virtualizer = virt,
+            loudness = loud
+        )
+    }
+
+    private fun persist(block: suspend () -> Unit) {
+        scope.launch { runCatching { block() } }
+    }
+
+    fun release() {
+        runCatching { equalizer?.release() }
+        runCatching { bassBoost?.release() }
+        runCatching { virtualizer?.release() }
+        runCatching { loudness?.release() }
+        equalizer = null; bassBoost = null; virtualizer = null; loudness = null
+    }
+}

app/src/main/java/com/radiola/service/PlayerController.kt

@@ -42,7 +42,8 @@ import javax.inject.Singleton
 @Singleton
 class PlayerController @Inject constructor(
     @ApplicationContext context: Context,
-    private val sleepSoundPlayer: SleepSoundPlayer
+    private val sleepSoundPlayer: SleepSoundPlayer,
+    private val audioEffects: AudioEffectsController
 ) {
     // Анализатор спектра реального звука — для «живого» эквалайзера.
     private val spectrumAnalyzer = AudioSpectrumAnalyzer()
@@ -180,6 +181,11 @@ class PlayerController @Inject constructor(
                     }
                 }
             })
+            // Фиксированная аудиосессия → эффекты (эквалайзер и т.д.) держатся на ней
+            // и переживают смену станций. Привязываем их сразу после создания плеера.
+            val sessionId = audioManager.generateAudioSessionId()
+            runCatching { setAudioSessionId(sessionId) }
+            audioEffects.attach(sessionId)
         }
 
     val player: Player = object : ForwardingPlayer(exoPlayer) {

app/src/main/java/com/radiola/ui/equalizer/EqualizerScreen.kt

@@ -0,0 +1,311 @@
+package com.radiola.ui.equalizer
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.border
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.horizontalScroll
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Slider
+import androidx.compose.material3.SliderDefaults
+import androidx.compose.material3.Switch
+import androidx.compose.material3.SwitchDefaults
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.hilt.navigation.compose.hiltViewModel
+import com.composables.icons.lucide.ChevronLeft
+import com.composables.icons.lucide.Lucide
+import com.radiola.service.EqBand
+import com.radiola.ui.theme.RadiolaTheme
+
+@Composable
+fun EqualizerScreen(
+    onNavigateBack: () -> Unit,
+    viewModel: EqualizerViewModel = hiltViewModel()
+) {
+    val colors = RadiolaTheme.colors
+    val state by viewModel.state.collectAsState()
+    val on = state.enabled
+
+    Column(modifier = Modifier.fillMaxSize()) {
+        // Шапка с кнопкой «назад»
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(horizontal = 12.dp, vertical = 12.dp),
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Icon(
+                Lucide.ChevronLeft,
+                contentDescription = "Назад",
+                tint = colors.textPrimary,
+                modifier = Modifier
+                    .clip(RoundedCornerShape(12.dp))
+                    .clickable { onNavigateBack() }
+                    .padding(8.dp)
+                    .size(24.dp)
+            )
+            Spacer(Modifier.width(4.dp))
+            Text(
+                text = "Эквалайзер",
+                style = MaterialTheme.typography.headlineSmall,
+                color = colors.textPrimary,
+                fontWeight = FontWeight.Bold
+            )
+        }
+
+        if (!state.available) {
+            Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
+                Text(
+                    "Эквалайзер недоступен на этом устройстве",
+                    color = colors.textSecondary,
+                    style = MaterialTheme.typography.bodyMedium,
+                    modifier = Modifier.padding(32.dp)
+                )
+            }
+            return
+        }
+
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .verticalScroll(rememberScrollState())
+                .padding(horizontal = 20.dp)
+                .padding(bottom = 32.dp),
+            verticalArrangement = Arrangement.spacedBy(20.dp)
+        ) {
+            // Главный тумблер
+            Card(colors) {
+                Row(
+                    modifier = Modifier.fillMaxWidth().padding(16.dp),
+                    horizontalArrangement = Arrangement.SpaceBetween,
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
+                    Column(Modifier.weight(1f)) {
+                        Text(
+                            "Эквалайзер",
+                            style = MaterialTheme.typography.titleMedium,
+                            color = colors.textPrimary
+                        )
+                        Text(
+                            "Тонкая настройка звука и улучшайзеры",
+                            style = MaterialTheme.typography.labelMedium,
+                            color = colors.textSecondary
+                        )
+                    }
+                    Switch(
+                        checked = on,
+                        onCheckedChange = { viewModel.setEnabled(it) },
+                        colors = SwitchDefaults.colors(
+                            checkedThumbColor = colors.bgBase,
+                            checkedTrackColor = colors.accent,
+                            uncheckedThumbColor = colors.textMuted,
+                            uncheckedTrackColor = colors.surface2
+                        )
+                    )
+                }
+            }
+
+            // Пресеты
+            if (state.presets.isNotEmpty()) {
+                Label("ПРЕСЕТЫ")
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .horizontalScroll(rememberScrollState()),
+                    horizontalArrangement = Arrangement.spacedBy(8.dp)
+                ) {
+                    state.presets.forEachIndexed { index, name ->
+                        val selected = state.currentPreset == index
+                        Box(
+                            modifier = Modifier
+                                .clip(RoundedCornerShape(10.dp))
+                                .background(if (selected) colors.accent else colors.surface2)
+                                .clickable(enabled = on) { viewModel.selectPreset(index) }
+                                .padding(horizontal = 14.dp, vertical = 8.dp)
+                        ) {
+                            Text(
+                                text = name,
+                                style = MaterialTheme.typography.labelLarge,
+                                color = if (selected) colors.bgBase else colors.textSecondary,
+                                fontWeight = if (selected) FontWeight.SemiBold else FontWeight.Normal
+                            )
+                        }
+                    }
+                    // «Свой» — активен, когда полосы правились вручную
+                    val custom = state.currentPreset == -1
+                    Box(
+                        modifier = Modifier
+                            .clip(RoundedCornerShape(10.dp))
+                            .background(if (custom) colors.accent else colors.surface2)
+                            .padding(horizontal = 14.dp, vertical = 8.dp)
+                    ) {
+                        Text(
+                            "Свой",
+                            style = MaterialTheme.typography.labelLarge,
+                            color = if (custom) colors.bgBase else colors.textSecondary,
+                            fontWeight = if (custom) FontWeight.SemiBold else FontWeight.Normal
+                        )
+                    }
+                }
+            }
+
+            // Полосы эквалайзера
+            Label("ЧАСТОТЫ")
+            Card(colors) {
+                Column(
+                    modifier = Modifier.fillMaxWidth().padding(16.dp),
+                    verticalArrangement = Arrangement.spacedBy(6.dp)
+                ) {
+                    state.bands.forEach { band ->
+                        BandRow(
+                            band = band,
+                            enabled = on,
+                            colors = colors,
+                            onChange = { viewModel.setBand(band.index, it) },
+                            onCommit = { viewModel.commit() }
+                        )
+                    }
+                }
+            }
+
+            // Улучшайзеры
+            Label("УЛУЧШАЙЗЕРЫ")
+            Card(colors) {
+                Column(
+                    modifier = Modifier.fillMaxWidth().padding(16.dp),
+                    verticalArrangement = Arrangement.spacedBy(16.dp)
+                ) {
+                    if (state.hasBass) {
+                        EnhancerSlider("Bass Boost", "Усиление баса", state.bass, on, colors,
+                            { viewModel.setBass(it) }, { viewModel.commit() })
+                    }
+                    if (state.hasVirtualizer) {
+                        EnhancerSlider("Virtualizer", "Объём / ширина стерео", state.virtualizer, on, colors,
+                            { viewModel.setVirtualizer(it) }, { viewModel.commit() })
+                    }
+                    if (state.hasLoudness) {
+                        EnhancerSlider("Громкость", "Подъём тихих станций (до +12 дБ)", state.loudness, on, colors,
+                            { viewModel.setLoudness(it) }, { viewModel.commit() })
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun Card(colors: com.radiola.ui.theme.RadiolaColors, content: @Composable () -> Unit) {
+    Box(
+        modifier = Modifier
+            .fillMaxWidth()
+            .clip(RoundedCornerShape(16.dp))
+            .background(colors.surface)
+            .border(1.dp, colors.border, RoundedCornerShape(16.dp))
+    ) { content() }
+}
+
+@Composable
+private fun Label(text: String) {
+    Text(
+        text = text,
+        style = MaterialTheme.typography.labelSmall,
+        color = RadiolaTheme.colors.textMuted,
+        letterSpacing = 1.sp
+    )
+}
+
+@Composable
+private fun BandRow(
+    band: EqBand,
+    enabled: Boolean,
+    colors: com.radiola.ui.theme.RadiolaColors,
+    onChange: (Int) -> Unit,
+    onCommit: () -> Unit
+) {
+    Row(verticalAlignment = Alignment.CenterVertically) {
+        Text(
+            text = freqLabel(band.centerHz),
+            style = MaterialTheme.typography.labelMedium,
+            color = colors.textSecondary,
+            modifier = Modifier.width(60.dp)
+        )
+        Slider(
+            value = band.levelMb.toFloat(),
+            onValueChange = { onChange(it.toInt()) },
+            onValueChangeFinished = onCommit,
+            valueRange = band.minMb.toFloat()..band.maxMb.toFloat(),
+            enabled = enabled,
+            colors = SliderDefaults.colors(
+                thumbColor = colors.accent,
+                activeTrackColor = colors.accent,
+                inactiveTrackColor = colors.surface2
+            ),
+            modifier = Modifier.weight(1f)
+        )
+        Text(
+            text = "%+d dB".format(band.levelMb / 100),
+            style = MaterialTheme.typography.labelMedium,
+            color = colors.accent,
+            modifier = Modifier.width(52.dp),
+            fontWeight = FontWeight.SemiBold
+        )
+    }
+}
+
+@Composable
+private fun EnhancerSlider(
+    title: String,
+    subtitle: String,
+    value: Int,
+    enabled: Boolean,
+    colors: com.radiola.ui.theme.RadiolaColors,
+    onChange: (Int) -> Unit,
+    onCommit: () -> Unit
+) {
+    Column {
+        Row(
+            modifier = Modifier.fillMaxWidth(),
+            horizontalArrangement = Arrangement.SpaceBetween,
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Column(Modifier.weight(1f)) {
+                Text(title, style = MaterialTheme.typography.titleMedium, color = colors.textPrimary)
+                Text(subtitle, style = MaterialTheme.typography.labelSmall, color = colors.textSecondary)
+            }
+            Text(
+                "$value%",
+                style = MaterialTheme.typography.titleMedium,
+                color = colors.accent,
+                fontWeight = FontWeight.SemiBold
+            )
+        }
+        Slider(
+            value = value.toFloat(),
+            onValueChange = { onChange(it.toInt()) },
+            onValueChangeFinished = onCommit,
+            valueRange = 0f..100f,
+            enabled = enabled,
+            colors = SliderDefaults.colors(
+                thumbColor = colors.accent,
+                activeTrackColor = colors.accent,
+                inactiveTrackColor = colors.surface2
+            )
+        )
+    }
+}
+
+private fun freqLabel(hz: Int): String =
+    if (hz >= 1000) "%.1f kHz".format(hz / 1000f) else "$hz Hz"

app/src/main/java/com/radiola/ui/equalizer/EqualizerViewModel.kt

@@ -0,0 +1,24 @@
+package com.radiola.ui.equalizer
+
+import androidx.lifecycle.ViewModel
+import com.radiola.service.AudioEffectsController
+import com.radiola.service.EqState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.StateFlow
+import javax.inject.Inject
+
+@HiltViewModel
+class EqualizerViewModel @Inject constructor(
+    private val audioEffects: AudioEffectsController
+) : ViewModel() {
+
+    val state: StateFlow<EqState> = audioEffects.state
+
+    fun setEnabled(on: Boolean) = audioEffects.setEnabled(on)
+    fun selectPreset(index: Int) = audioEffects.selectPreset(index)
+    fun setBand(index: Int, levelMb: Int) = audioEffects.setBand(index, levelMb)
+    fun setBass(value: Int) = audioEffects.setBass(value)
+    fun setVirtualizer(value: Int) = audioEffects.setVirtualizer(value)
+    fun setLoudness(value: Int) = audioEffects.setLoudness(value)
+    fun commit() = audioEffects.commit()
+}

app/src/main/java/com/radiola/ui/navigation/NavDestinations.kt

@@ -24,6 +24,7 @@ sealed class NavDestinations(
     data object Settings : NavDestinations("settings", "Настройки", Lucide.Settings)
     data object Auth : NavDestinations("auth", "Вход", Lucide.Settings, showInBottomBar = false)
     data object Alarms : NavDestinations("alarms", "Будильник", Lucide.AlarmClock, showInBottomBar = false)
+    data object Equalizer : NavDestinations("equalizer", "Эквалайзер", Lucide.Settings, showInBottomBar = false)
 
     companion object {
         val items = listOf(Stations, Charts, Favorites, History, Recordings, Settings)

app/src/main/java/com/radiola/ui/settings/SettingsScreen.kt

@@ -29,6 +29,7 @@ import androidx.hilt.navigation.compose.hiltViewModel
 import com.composables.icons.lucide.AlarmClock
 import com.composables.icons.lucide.ChevronRight
 import com.composables.icons.lucide.Lucide
+import com.composables.icons.lucide.SlidersHorizontal
 import com.composables.icons.lucide.User
 import com.radiola.domain.model.DeeplinkService
 import com.radiola.domain.model.StationTestStatus
@@ -41,12 +42,12 @@ import com.radiola.ui.theme.ThemePalette
 fun SettingsScreen(
     onNavigateToAuth: () -> Unit,
     onNavigateToAlarms: () -> Unit = {},
+    onNavigateToEqualizer: () -> Unit = {},
     modifier: Modifier = Modifier,
     viewModel: SettingsViewModel = hiltViewModel()
 ) {
     val sleepTimer by viewModel.sleepTimerMinutes.collectAsState()
     val enabledServices by viewModel.enabledServices.collectAsState()
-    val equalizerPreset by viewModel.equalizerPreset.collectAsState()
     val visualizerStyle by viewModel.visualizerStyle.collectAsState()
     val themePalette by viewModel.themePalette.collectAsState()
     val isRecordingEnabled by viewModel.isRecordingEnabled.collectAsState()
@@ -57,7 +58,6 @@ fun SettingsScreen(
     val testResults by viewModel.testResults.collectAsState()
     val isLoggedIn by viewModel.isLoggedIn.collectAsState()
     val currentUser by viewModel.currentUser.collectAsState()
-    val presets = listOf("Flat", "Rock", "Pop", "Jazz", "Bass")
     var showReport by remember { mutableStateOf(false) }
     val colors = RadiolaTheme.colors
 
@@ -309,9 +309,9 @@ fun SettingsScreen(
             )
         }
 
-        // --- Эквалайзер ---
+        // --- Эквалайзер (отдельный детальный экран) ---
         item {
-            SectionLabel("ЭКВАЛАЙЗЕР")
+            SectionLabel("ЗВУК")
             Spacer(Modifier.height(8.dp))
             Row(
                 modifier = Modifier
@@ -319,38 +319,35 @@ fun SettingsScreen(
                     .clip(RoundedCornerShape(16.dp))
                     .background(colors.surface)
                     .border(1.dp, colors.border, RoundedCornerShape(16.dp))
-                    .padding(12.dp),
-                horizontalArrangement = Arrangement.spacedBy(6.dp)
+                    .clickable { onNavigateToEqualizer() }
+                    .padding(horizontal = 16.dp, vertical = 16.dp),
+                verticalAlignment = Alignment.CenterVertically,
+                horizontalArrangement = Arrangement.spacedBy(14.dp)
             ) {
-                presets.forEach { preset ->
-                    val selected = equalizerPreset == preset
-                    val bgColor by animateColorAsState(
-                        targetValue = if (selected) colors.accent else colors.surface2,
-                        animationSpec = tween(Motion.Medium),
-                        label = "eqSegment"
+                Icon(
+                    Lucide.SlidersHorizontal,
+                    contentDescription = null,
+                    tint = colors.accent,
+                    modifier = Modifier.size(22.dp)
+                )
+                Column(modifier = Modifier.weight(1f)) {
+                    Text(
+                        text = "Эквалайзер",
+                        style = MaterialTheme.typography.titleMedium,
+                        color = colors.textPrimary
                     )
-                    val textColor by animateColorAsState(
-                        targetValue = if (selected) colors.bgBase else colors.textSecondary,
-                        animationSpec = tween(Motion.Medium),
-                        label = "eqText"
+                    Text(
+                        text = "Полосы, пресеты, бас, объём, громкость",
+                        style = MaterialTheme.typography.labelMedium,
+                        color = colors.textSecondary
                     )
-                    Box(
-                        modifier = Modifier
-                            .weight(1f)
-                            .clip(RoundedCornerShape(8.dp))
-                            .background(bgColor)
-                            .clickable { viewModel.setEqualizerPreset(preset) }
-                            .padding(vertical = 8.dp),
-                        contentAlignment = Alignment.Center
-                    ) {
-                        Text(
-                            text = preset,
-                            style = MaterialTheme.typography.labelLarge,
-                            color = textColor,
-                            fontWeight = if (selected) FontWeight.SemiBold else FontWeight.Normal
-                        )
-                    }
                 }
+                Icon(
+                    Lucide.ChevronRight,
+                    contentDescription = null,
+                    tint = colors.textMuted,
+                    modifier = Modifier.size(18.dp)
+                )
             }
         }